Patent Publication Number: US-2012046796-A1

Title: Energy management apparatus, method, and system

Description:
TECHNICAL FIELD 
     The present invention relates to a technique for controlling energy consumption among a plurality of buildings, on the basis of information from utilities. 
     BACKGROUND ART 
     Energy consumption control is executed in houses (detached and condominium) and buildings such as an office building. Controlling methods currently employed include setting a permissible value of energy consumption with respect to each type of apparatuses, and automatically controlling the operation of each single apparatus on the basis of sensing information. These methods contribute to suppressing the peak power consumption in the building, and to improving the energy utilization efficiency of each single apparatus. 
     For example, PTL 1 discloses a technique of collecting power consumption information of apparatuses and learning and classifying the power consumption of each energy system. In the case where the power consumption exceeds a permissible threshold, the power consumption of each classified rank is aggregated with respect to the respective energy systems. Then the power consumption of the apparatus the aggregated amount of which is greater than the learned power consumption is suppressed. 
     In addition, PTL 2 discloses a technique of collecting power consumption of a specific type of apparatuses, and creating a control method that makes the power consumption of the specific apparatuses minimal, on the basis of the collected power consumption. At the same time as creating the control method that makes the power consumption minimal, a forecast of the energy saving effect is made that would be attained by controlling the specific apparatuses in accordance with the generated method. Then the forecast thus made up is applied to all the apparatuses of that specific type, as a proposal of energy-saving measures. 
     CITATION LIST 
     Patent Literature 
     [PTL 1] Japanese Unexamined Patent Application Publication No. 11-178247 
     [PTL 2] Japanese Unexamined Patent Application Publication No. 2003-158823 
     SUMMARY OF INVENTION 
     Technical Problem 
     The above-cited techniques allow the peak power consumption in the building to be suppressed, and the energy utilization efficiency of each single apparatus to be improved. However, an optimum control of the energy-related apparatuses (apparatuses that supply or consume an energy, energy storage apparatuses, and so forth) in the entire building cannot be executed, and the control experience (control experience information) obtained through the adopted control method cannot be diffused. 
     In addition, the cost and structure of powers are expected to dynamically fluctuate with the expansion of utilization of renewable energies. Accordingly, a technique has to be established that suppresses the energy consumption of the entire building, in accordance with such a fluctuation. 
     On the other hand, the energy consumption and the cost therefor are often largely different among a plurality of similar buildings depending on the attitude of users of the building, despite that those buildings are located in the same district of the same weather and having the same utilization contracts with electricity companies and gas companies. Such a difference is produced primarily by the style of use of the users, the way of using the apparatuses, and different settings for the operation. In the case of an independent single apparatus, a proper energy-saving using mode can be instructed to the user through a manual. However, when a plurality of apparatuses is used in combination it is difficult to instruct a proper energy-saving using mode to the user, and hence the user can only depend on his/her own knowledge and experience. 
     The present invention has been accomplished in view of the foregoing situation, with an object to provide a method of transmitting a proper energy-saving control experience (energy-saving control experience information) with respect to a combination of apparatuses among a plurality of buildings, and an instruction method of energy-saving control experience information (energy management apparatus) that enables the energy-saving control method for the district to be automatically and rapidly diffused. 
     Solution to Problem 
     Accordingly, an aspect of the present invention provides an energy management apparatus that manages supply and demand of an energy in a building, the apparatus including an apparatus information processing unit connected to an energy-related apparatus used in the building through an internal communication network, and configured to collect in advance information (for identification) of a function and performance spec of the energy-related apparatus through the internal communication network and to store the information as (information of) an apparatus profile ; an apparatus operation processing unit configured to collect an energy consumption history including an operation history of the energy-related apparatus and the energy consumed through a first time unit by operating the energy-related apparatus (for example, information indicating the amount of consumed energy); an energy consumption history management unit configured to store the energy consumption history as an energy consumption history profile; a control history processing unit configured to extract the energy consumption history that contains an amount evaluated (identified) as optimum on the basis of predetermined criteria, from among a plurality of the energy consumption history profiles representing substantially the same total amount of energy consumption through a second time unit, and to generate an optimum energy consumption pattern including the extracted energy consumption history; and a control history transmission unit configured to transmit the generated optimum energy consumption pattern through a first external communication network to a second energy management apparatus that controls supply and demand of an energy outside the building and in a building adjacent thereto. 
     In another aspect, the present invention provides an energy management apparatus (a second energy management apparatus) that manage&#39;s supply and demand of an energy in a building, the apparatus including a control history transmission unit configured to receive an optimum energy consumption pattern from a first energy management apparatus that controls supply and demand of an energy outside the building of the second energy management apparatus and in a building adjacent thereto; and an apparatus control application unit configured to accept the received optimum energy consumption pattern as a reference plan for operating energy-related apparatuses in the building of the second energy management apparatus and to execute the optimum energy consumption pattern, in the case where similarity of an apparatus profile contained in the received optimum energy consumption pattern in comparison with an apparatus profile of the second energy management apparatus is not lower than a predetermined threshold, and the received optimum energy consumption pattern is superior to an optimum energy consumption pattern of the second energy management apparatus on the basis of predetermined criteria. 
     Here, managing the supply and demand of an energy includes, for example, controlling an inputting or outputting operation of an energy using energy-related apparatuses. The apparatus profile corresponds, for example, to information by which the type of the energy-related apparatus can be identified. The situation where the two amounts are equivalent may include the case where one is within a predetermined range with respect to the other, or the same as the other. The expression “evaluated as optimum” refers, for example, to the case where the calculated amount is the most appropriate value. The term “adjacent” refers, for example, to not being separated by more than a predetermined distance, but being within that distance. 
     Advantageous Effects of Invention 
     The energy management apparatus configured as above enables users of a plurality of buildings in the same district, who are not acquainted with one another, to share energy-saving control experience information (for example,  FIG. 16 ). This leads to suppression of energy consumption cost and reduction of CO 2  emission, not only in individual buildings but over the entire district. 
     While an appropriate control can be easily executed, the executed control can be sufficiently appropriate. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a block diagram showing an outline of processing. 
         FIG. 2  is a block diagram showing a configuration of an energy management apparatus. 
         FIG. 3  is a block diagram showing a system configuration. 
         FIG. 4  is a block diagram showing a system configuration including a management server. 
         FIG. 5  includes tables showing an apparatus profile. 
         FIG. 6  includes tables showing an energy consumption history profile. 
         FIG. 7  is a table showing utility information. 
         FIG. 8  is a table showing an optimum energy consumption pattern. 
         FIG. 9  includes tables showing a use environment profile. 
         FIG. 10  is a block diagram showing energy management apparatuses on a transmitting side and a receiving side, respectively. 
         FIG. 11  is a block diagram showing the energy management apparatuses on the transmitting side and the receiving side respectively, and another energy management apparatus. 
         FIG. 12  is another block diagram showing the energy management apparatuses on the transmitting side and the receiving side respectively, and another energy management apparatus: 
         FIG. 13  is a block diagram showing a utility company and the energy management apparatus. 
         FIG. 14  is another block diagram showing energy management apparatuses on the transmitting side and the receiving side, respectively. 
         FIG. 15  is a block diagram showing a system including four energy management apparatuses. 
         FIG. 16  is a block diagram showing an example of the system. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereafter, an embodiment of the present invention will be described referring to the drawings. 
     An energy management apparatus A (for example, a first energy management apparatus  101   a  in  FIG. 11 ,  FIG. 10 , and  FIG. 1 , and an energy management apparatus  101  in  FIG. 2 ) according to the embodiment serves to manage the supply and demand of energy in a building (for example, first building  11   a  in  FIG. 1 ). The energy management apparatus A is connected to energy-related apparatuses (apparatus  12   a ) used in the building through an internal communication network (internal communication network  102   a  in  FIG. 3 ). The energy management apparatus A includes an apparatus information processing unit (apparatus information processing unit  301 ), an apparatus operation processing unit (apparatus operation processing unit  302 ), an energy consumption history management unit (energy consumption history management unit  305 ), a control history processing unit (control history processing unit  306 ), and a control history transmission unit (control history transmission unit  303 ). The apparatus information processing unit (apparatus information processing unit  301 ) collects in advance information for identifying the function of the energy-related apparatuses and performance spec information thereof through the internal communication network, and stores such information as an apparatus profile (apparatus profile  510 , apparatus information  512  in  FIG. 5 ). The apparatus operation processing unit (apparatus operation processing unit  302 ) collects the operation history of the energy-related apparatuses and the consumption history of energy consumed by the operation through a first time unit. The energy consumption history management unit (energy consumption history management unit  305 ) stores the energy consumption history as an energy consumption history profile (energy consumption history profile  610  and operation history information  615  in  FIG. 6 ). The control history processing unit (control history processing unit  306 ) extracts the energy consumption history, an amount of which to be evaluated on the basis of predetermined criteria is evaluated as optimum on the basis of the predetermined criteria, from among a plurality of the energy consumption history profiles representing an equivalent total amount of energy consumption (total energy consumption  612  in  FIG. 6 ) through a second time unit. Here, the second time unit corresponds to the time unit for a second time section  611 . The predetermined criteria includes, for example, criteria [1] to [4] to be subsequently described, and the amounts evaluated on the basis of the predetermined criteria include energy consumption amount  6153 , an amount calculated from a CO 2  emission equivalent  6155 , and an amount calculated from these amounts. The control history processing unit (control history processing unit  306 ) then generates an optimum energy consumption pattern (optimum energy consumption pattern  810  in  FIG. 8 ) including the energy consumption history thus extracted. The control history transmission unit (control history transmission unit  303 ) transmits the generated optimum energy consumption pattern through a first external communication network (external communication network  103  in  FIG. 3 ) to a second energy management apparatus (second energy management apparatus  101   b ) that manages the supply and demand of energy outside the building (first building  11   a ) and in another building (second building  11   b ) adjacent thereto. 
     Here, for example an apparatus profile containing the function information and the performance spec information collected in advance as above may be generated and stored. Also, for example an energy consumption history evaluated to be relatively appropriate on the basis of the predetermined criteria as above may be extracted. 
     Now, an energy management apparatus B (for example, a second energy management apparatus  101   b  in  FIG. 11  and an energy management apparatus  101  in  FIG. 10  and  FIG. 2 ) according to the embodiment serves to manage the supply and demand of energy in a building (second building  11   b ). The energy management apparatus B includes a control history transmission unit (control history transmission unit  303 ), and an apparatus control application unit (apparatus control application unit  307 ). The control history transmission unit (control history transmission unit  303 ) receives an optimum energy consumption pattern (optimum energy consumption pattern  810   h ) from the first energy management apparatus (first energy management apparatus  101   a ) that controls the supply and demand of energy outside the building (second building  11   b ) of the second energy management apparatus and in another building (first building  11   a ) adjacent thereto. The apparatus control application unit (apparatus control application unit  307 ) accepts the received optimum energy consumption pattern as a reference plan for operating the energy-related apparatuses in the building of the second energy management apparatus and executes the optimum energy consumption pattern, in the case where similarity of the apparatus profile (apparatus profile  510 ) contained in the received optimum energy consumption pattern in comparison with the apparatus profile of the second energy management apparatus (second energy management apparatus  101   b ) is not lower than a predetermined threshold (to be subsequently described), and the received optimum energy consumption pattern is (decided to be) superior to the optimum energy consumption pattern of the second energy management apparatus (generated in the second energy management apparatus), on the basis of predetermined criteria (for example, superior or inferior in the criteria [1] to [4]). 
     The amount to be evaluated on the basis of the predetermined criteria may be a total amount of the energy consumption through the first time unit shorter than the second time unit which is relatively long, or a total CO 2  emission equivalent through the second time unit. Alternatively, an amount calculated from these amounts may be evaluated. The term “evaluate” refers to, for example, calculating from a certain amount (calculated amount) an evaluated value of this amount, the evaluated value indicating an amount of another evaluated value and superiority or inferiority with respect to the amount of the another evaluated value, on the basis of a difference from the another evaluated value. 
     Also, “evaluated to be optimum” refers to obtaining the highest evaluation among the plurality of energy consumption history profiles, for example being evaluated that the total energy consumption is the lowest. 
     Further, the expression “similarity of an apparatus profile with respect to another apparatus profile is higher than a predetermined threshold” may include the case where, for example, the apparatus profile is the first apparatus profile between a first apparatus profile and a second apparatus profile to be subsequently described. Here, the first apparatus profile refers to an apparatus profile that enables a control based on the optimum energy consumption pattern containing the first apparatus profile to be executed with respect to the second energy management apparatus that includes the another apparatus profile. The second apparatus profile refers to an apparatus profile that does not allow a control based on the optimum energy consumption pattern containing the first apparatus profile to be executed with respect to the second energy management apparatus that includes the another apparatus profile. 
     More specifically, the expression “similarity higher than a predetermined threshold” refers to the case where, for example, an apparatus profile is the same as another apparatus profile. 
     Thus, for example, while it is possible to execute the control based on the optimum energy consumption pattern containing the same apparatus profiles can be executed, it does not have to be possible to execute the control based on the optimum energy consumption pattern containing the apparatus profiles that are not the same. 
     Further details will be described here below. 
       FIG. 1  is a block diagram showing an outline of the process in which an optimum energy-saving control experience (optimum energy-saving control experience information) is instructed from a building A (first building  11   a ) to the other building B (second building  11   b ), in the case where the plurality of buildings according to the embodiment is exemplified by any given two buildings (for example, two houses). Hereunder, the configuration of the energy management apparatus  101  and a system  1 , as well as operations of the constituents will be disclosed. In the subsequent passages, the optimum energy-saving control experience information may be abbreviated as control experience as the case may be, and other types of experience information may also be abbreviated. 
     Configuration of Energy Management Apparatus 
       FIG. 2  is a block diagram showing an internal configuration of the energy management apparatus  101 . 
     The system  1  includes two energy management apparatuses  101 , namely the first energy management apparatus  101   a  and the second energy management apparatus  101   b  (for example,  FIGS. 1 ,  11 ). 
     The energy management apparatus  101  ( FIG. 2 ) essentially includes a CPU  201 , a storage unit  202 , and a communication I/F (interface)  203 . 
     The CPU  201  includes the apparatus information processing unit  301 , the apparatus operation processing unit  302 , the control history transmission unit  303 , a utility information processing unit  304 , the energy consumption history management unit  305 , the control history processing unit  306 , and the apparatus control application unit  307 . Accordingly, the functions of the respective functional block such as the apparatus information processing unit  301  are realized by the CPU  201 . 
     The storage unit  202  includes an apparatus energy consumption information storage unit  311 . 
     The communication I/F  203  includes a first communication unit  321 , a second communication unit  322 , and a third communication unit  323 . 
     Here, a part or whole of the energy management apparatus  101  may be, for example, a computer including the CPU  201 , the storage unit  202 , and so forth. In this case, the functions of the functional blocks such as the apparatus information processing unit  301  may be realized in the energy management apparatus  101  by execution of programs by the computer. The apparatus information processing unit  301  may be realized in the energy management apparatus  101  by allocating the function of the CPU  201  and other functions such as the storage unit  202  to the apparatus information processing unit  301 . This also applies to the functional blocks other than the apparatus information processing unit  301 . 
     The apparatus information processing unit  301  collects specific information (apparatus information) of the apparatus (object apparatus  12   x  in  FIG. 15  (apparatus  12   a  or apparatus  12   b  in  FIG. 1 )) in the building (object building  11   x  in  FIG. 15  (building A or building B in  FIG. 1 )) in which the energy management apparatus  101  is provided, through the first communication unit  321 . The apparatus information processing unit  301  then stores the collected specific information in the apparatus energy consumption information storage unit  311 . These operations are performed, for example, when the system of the energy management apparatus  101  is initialized, or when a new apparatus is added. 
     The apparatus operation processing unit  302  primarily performs the following two functions. 
     First, the apparatus operation processing unit  302  collects operation information of the apparatus (object apparatus  12   x ) in the building (object building  11   x ) of the energy management apparatus  101 . 
     Second, the apparatus operation processing unit  302  executes an optimum control with respect to the apparatus (object apparatus  12   x ). 
     The control history transmission unit  303  delivers an optimum energy consumption pattern  810  shown in  FIG. 8 , transmitted to the energy management apparatus  101  from another energy management apparatus  153  ( FIG. 15 ) different from the energy management apparatus  101 , to the control history processing unit  306 . 
     The above transmission may be made through a communication unit of the energy management apparatus  153  that is similar to the second communication unit  322  of the energy management apparatus  101 . 
     The control history transmission unit  303  also transfers the optimum energy consumption pattern  810  transmitted to the energy management apparatus  101 , upon receipt of a transfer instruction from the control history processing unit  306 , to still another energy management apparatus  154  ( FIG. 15 ) different from the energy management apparatus  153 . 
     The utility information processing unit  304  receives, from a utility company  11 U (server  11 U s  of utility company  11 U in  FIG. 3 ), utility information  710  shown in  FIG. 7  transmitted to the energy management apparatus  101  through the third communication unit  323 . The utility information processing unit  304  then provides the received utility information  710  to the energy consumption history management unit  305 . 
     The energy consumption history management unit  305  generates an energy consumption history profile (energy consumption history)  610  shown in  FIG. 6 , on the basis of the apparatus operation history from the apparatus operation processing unit  302  and the utility information from the utility information processing unit  304 . Then the energy consumption history management unit  305  stores the generated energy consumption history profile  610  in the apparatus energy consumption information storage unit  311 . 
     The control history processing unit  306  primarily has two functions. 
     First, the control history processing unit  306  handles an optimum energy consumption pattern  810  similar to the foregoing optimum energy consumption pattern  810  from another energy management apparatus  153  delivered from the control history transmission unit  303 . More specifically, the control history processing unit  306  decides whether an optimum energy consumption pattern  810  similar to the received one is present in the apparatus energy consumption information storage unit  311  of the energy management apparatus  101 . The control history processing unit  306  also decides whether the received optimum energy consumption pattern  810  is superior, in the case where the similar optimum energy consumption pattern  810  is present. Then the control history processing unit  306  additionally stores the received optimum energy consumption pattern  810  in the case where the similar optimum energy consumption pattern  810  has been decided not to be present, or updates the current one to the received one in the case where the latter has been decided to be superior. In this case, where it has been decided that the similar optimum energy consumption pattern  810  is not present or that the received optimum energy consumption pattern  810  is superior, the control history processing unit  306  instructs the control history transmission unit  303  of the energy management apparatus  101  to transfer the received optimum energy consumption pattern  810  to still another energy management apparatus  154 . Here, the term “similar optimum energy consumption pattern  810 ” refers to the case where, for example, the apparatus profile  510  contained therein is the same. 
     Second, the control history processing unit  306  performs a processing for the case where the energy consumption history profile  610  of the apparatus (object apparatus  12   x ) in the building (object building  11   x ) of the energy management apparatus  101  has been updated in the apparatus energy consumption information storage unit  311 . Specifically, the control history processing unit  306  decides, when such an update is made, whether the updated energy consumption history profile  610  is optimum among the energy consumption history profiles  610  generated in the energy management apparatus  101 . Then the control history processing unit  306  stores, in the case where the updated energy consumption history profile  610  is decided to be optimum, the optimum energy consumption pattern  810  containing the energy consumption history profile  610  decided to be optimum in the apparatus energy consumption information storage unit  311 . 
     The apparatus control application unit  307  performs a processing based on the optimum energy consumption pattern  810  stored in the apparatus energy consumption information storage unit  311 . Specifically, the apparatus control application unit  307  operates as follows when the optimum energy consumption pattern  810  thus far stored is updated to the new optimum energy consumption pattern  810  received from another energy management apparatus  153 . The apparatus control application unit  307  decides whether the updated optimum energy consumption pattern  810  is applicable to the apparatus (object apparatus  12   x ) in the building (object building  11   x ) to which the apparatus control application unit  307  belongs. In the affirmative case, the apparatus control application unit  307  executes the control based on the updated (received) optimum energy consumption pattern  810  with respect to the apparatus (object apparatus  12   x ), through the apparatus operation processing unit  302 . Thus, the apparatus control application unit  307  executes the control referring to the received optimum energy consumption pattern  810 . 
       FIG. 5  includes tables showing the apparatus profiles. 
     The apparatus energy consumption information storage unit  311  stores such apparatus profiles  510  as those shown in  FIG. 5 . 
     The apparatus profile  510  includes specific information (information  512   a  of a first apparatus to information  512   z  of an Nth apparatus) of the apparatuses, such as the number of apparatuses  511 , information  512   a  of the first apparatus, information  512   b  of the second apparatus, and so forth. 
     The information  512   a  of the first apparatus to the information  512   z  of the Nth apparatus each include, for example, specific apparatus information  512  shown in the right column of  FIG. 5 . 
     The specific apparatus information  512  includes, for example, the type of the apparatus  5121  (air conditioner, refrigerator, washing and drying machine, dish washer, TV, illumination, and so forth), static energy consumption characteristics  5122  (rated power consumption, minimum power consumption, peak power consumption, and so on), and energy-saving control characteristics  5123  (availability of energy-saving mode, reduction range of power consumption, and so on). 
       FIG. 6  includes tables showing the energy consumption history profile  610 . 
     The apparatus energy consumption information storage unit  311  also stores the energy consumption history profile  610  as those shown in  FIG. 6 . 
     The energy consumption history profile  610  includes, for example, the second time section  611 , total energy consumption  612  through the second time section  611 , an energy consumption cost  613 , and a CO 2  emission equivalent  614 . The second time section  611  corresponds to the second time unit which is relatively long, for example a day (24 hours). 
     The energy consumption history profile  610  also includes operation history information group (operation history information group  615   a  of the first apparatus to operation history information group  615   z  of the Nth apparatus) of the apparatuses, such as the operation history information (operation history information group)  615   a  of the first apparatus, the operation history information  615   b  of the second apparatus, and so forth. 
     Here, the energy consumption history profile  610  may contain the above cited information corresponding to the second time section  611 , with respect to each of a plurality of second time sections  611 . 
     Each of the operation history information groups (for example, operation history information group  615   a  of the first apparatus) includes one or more pieces of operation history information  615  (right column of  FIG. 6 ) of the apparatus of that operation history information group. 
     Specific operation history information  615  (right column of  FIG. 6 ) of the apparatus includes, for example, a time section of operation (first time section)  6151 , an operation mode  6152 , an energy consumption amount  6153 , a CO 2  emission equivalent  6155 , and energy utilization efficiency  6156  of the apparatus. 
     Here, the first time section  6151  is a time section of a time unit shorter than the time unit of the above mentioned second time section  611  (left column of  FIG. 6 ). The first time section  6151  constitutes a part of the second time section  611  included in the energy consumption history profile  610  containing the operation history information group that includes the operation history information  615  corresponding to the first time section  6151 . 
     Also, the first time section  6151  is a period different from first time sections  6151  included in all other operation history information  615  included in the operation history information group that includes the operation history information  615  corresponding to the first time section  6151 . 
     The energy utilization efficiency  6156  (right column of  FIG. 6 ) may be what is known as coefficient of performance (COP). 
       FIG. 7  is a table showing the utility information. 
     The utility information  710  is received from the utility company  11 U ( FIG. 3 ), and stored in the energy consumption history management unit  305  as mentioned earlier. 
     The utility information  710  includes, for example, a power unit price by time zone  711  and a CO 2  emission equivalent of unit power  712 , as shown in  FIG. 7 . 
       FIG. 8  is a table showing the optimum energy consumption pattern  810 . 
     The apparatus energy consumption information storage unit  311  also stores the optimum energy consumption pattern  810  shown in  FIG. 8 . 
     The optimum energy consumption pattern  810  includes, for example, criteria for optimum decision  811 , the apparatus profile  510 , and the energy consumption history profile  610 . 
     The optimum energy consumption pattern  810  may also include the apparatus profile  510  ( FIG. 5 ) and the energy consumption history profile  610  ( FIG. 6 ) corresponding to (the apparatus of) the apparatus profile  510 , as a set. 
     The optimum energy consumption pattern  810  may include a plurality of data sets, not only one data set. 
     Thus, the optimum energy consumption pattern  810  may include a plurality of apparatus profiles  510  different from each other, and a plurality of data sets each corresponding to each of the plurality of apparatus profiles  510 . 
     In addition, the criteria for optimum decision  811  may also include a plurality of criteria for optimum decision  811  each corresponding to each of the plurality of data sets. 
       FIG. 9  includes tables showing the use environment profile  910 . 
     The use environment profile  910  may be included, for example, in the apparatus profile  510  ( FIG. 5 ). 
     As shown in  FIG. 9 , the use environment profile  910  includes a building profile  911 , a user profile  912 , and a weather information  913 , for example. 
     The building profile  911  includes, for example, location of building  9111 , structure of building  9112 , and size of building  9113 , as shown in the right column of  FIGS. 9 . 
     The user profile  912  includes, for example, number of users  9121 , time zone of use  9122 , and feature of users  9123 . 
     The weather information  913  includes, for example, temperature  9131  and humidity  9132 . 
     The first communication unit  321  makes wired or wireless communication with the apparatus (object apparatus  12   x  in  FIG. 15 ) in the object building  11   x  ( FIG. 15 ) in which the energy management apparatus  101  is provided. The first communication unit  321  collects the specific information and operation information of the apparatus with which the communication is being made, and executes a control of that apparatus. 
     The second communication unit  322  makes communication with other energy management apparatuses (another energy management apparatus  152  to another energy management apparatus  154  in  FIG. 15 ) in the buildings other than the object building  11   x  in which the energy management apparatus  101  is provided. Through the communication, the second communication unit  322  exchanges information about the optimum energy consumption pattern. 
     Each of the first communication unit  321  to the third communication unit  323  executes communication upon being instructed by other functional blocks (apparatus information processing unit  301  and so forth) that employ the communication unit. Other functional blocks issue such an instruction when making communication through the communication unit. 
     In the case where a management server (for example, management server  11 M in  FIG. 4 ) is available, the second communication unit  322  makes communication with the management server, so as to exchange information about the optimum energy consumption pattern. 
     The third communication unit  323  makes communication with the apparatus (for example, server  11 U s  in  FIGS. 3 and 4 ) of the utility company (for example, utility company  11 U in  FIGS. 3 and 4 ), and acquires information such as the power unit price. 
     Both of the first energy management apparatus  101   a  and the second energy management apparatus  101   b  ( FIG. 1 ,  FIG. 10 ,  FIG. 11 ) are the energy management apparatus  101  described above, and have all the above mentioned functions of the energy management apparatus  101  (see  FIG. 10 ). 
     Each of the first energy management apparatus  101   a  and the second energy management apparatus  101   b  may have just a part of the mentioned functions of the energy management apparatus  101 . Further details on this respect will be subsequently described ( FIG. 11  to  FIG. 14 ). 
     System Configuration 
       FIG. 3  illustrates a general configuration of the system  1  for executing the processes shown in  FIG. 1 . 
     For example, in the building A the first energy management apparatus  101   a  ( FIG. 1 ) and the apparatus (apparatus  12   a ) are connected through the internal communication network  102   a . As described above, the first energy management apparatus  101   a  makes communication with the apparatus (apparatus  12   a ) connected to the internal communication network  102   a  in the building A, utilizing the first communication unit  321  of the first energy management apparatus  101   a.    
     Some types of apparatuses do not have to have a communication unit as the first communication unit  321  of the first energy management apparatus  101   a . Such a type of apparatus may be connected to the internal communication network  102   a  through an agent (not shown) of that apparatus. 
     In the case where a sensor or a meter (not shown) is employed to collect the operation information of the apparatus, the collected information may be transmitted from the sensor or the meter to the first energy management apparatus  101   a  through the internal communication network  102   a.    
     Regarding the foregoing aspects, the same also applies to the building B (see second energy management apparatus  101   b , apparatus  12   b , internal communication network  102   b  in  FIG. 3 ). 
     Between the building A and the building B, the first energy management apparatus  101   a  and the second energy management apparatus  101   b  are connected to each other through the external communication network  103 . Under such a circumstance, the mating energy management apparatuses, namely the first energy management apparatus  101   a  and the second energy management apparatus  101   b  execute the following processes. Specifically, the energy management apparatuses execute instruction and diffusion of the optimum energy consumption pattern  810 , more precisely the optimum energy-saving control experience (energy consumption history profile  610 ) contained in the optimum energy consumption pattern  810 , through the second communication unit  322  ( FIG. 2 ) of the respective energy management apparatuses. 
     The buildings (energy management apparatuses) are each connected to the utility company  11 U (server  11 U s ) through an external communication network  104 . 
     Through the external communication network  104 , information from the utility company  11 U such as the power unit price is distributed by the server  11 U s  at a predetermined time interval. Specifically, the information such as the power unit price may be transmitted to a Smart Meter (not shown) provided in the respective buildings. In the case where the information such as the power unit price is transmitted to the Smart Meter, each energy management apparatus can receive the information such as the power unit price from the Smart Meter of the building (object building  11   x  in  FIG. 15 ) in which the energy management apparatus is provided. 
     The information may thus be distributed to the respective energy management apparatuses by the server  11 U s.    
     More specifically, the external communication network  103  may be a Neighbor Area Network (NAN). The Neighbor Area Network may be based on IEEE802.15.4 or Zigbee standard, for example. The internal communication network such as the internal communication network  102   a  may be a Home Area Network (HAN) or a Local Area Network (LAN). 
       FIG. 4  illustrates a general configuration of the system  1  (system l a ) in which the management server  11 M is available. 
     In the system shown in  FIG. 4 , the instruction and diffusion of the optimum energy consumption pattern  810 , specifically the optimum energy-saving control experience can be rapidly and efficiently performed between a plurality of buildings distant from each other, through the management server  11 M and the external communication network  105 . Here, the building A and the building B may be far away from each other or relatively close to each other. In other words, it suffices that one of the buildings be located within a predetermined neighborhood area of the other building. The management server  11 M stores the apparatus profiles  510 , the energy consumption history profiles  610 , and the optimum energy consumption patterns  810  composed of an equal or greater number of types than those stored in the energy management apparatus  101 . The management server  11 M storing such data can proper instruct an initial energy-saving control experience to an energy management apparatus (second energy management apparatus  101   b ) of a newly added building (for example building B). Further, the management server  11 M may have, for example, a part of the functional blocks included in the CPU  201  of the energy management apparatus  101  ( FIG. 2 ). In other words, the management server  11 M may execute a part of the functions of the energy management apparatus  101 , for example those of the energy consumption history management unit and the control history processing unit, on behalf of the energy management apparatus  101 . 
     The system  1  may be configured as the system  1   a ′ described above. Management of apparatus information 
     In the energy management apparatus  101 , the management of the apparatus information is performed in the form of the apparatus profile  510  shown in  FIG. 5 . In the case of adding or removing an apparatus (object apparatus  12   x  in  FIG. 15 ), the apparatus information processing unit  301  adds or deletes the information entry (for example, information of the first apparatus  512   a  in  FIG. 5 ) of the added or removed apparatus, with respect to the apparatus profile  510  ( FIG. 5 ). 
     The apparatuses (object apparatus  12   x  in  FIG. 15 ) controlled by the energy management apparatus  101  may include an energy storage apparatus, in addition to the apparatuses that supply or consume energy. For example, a battery may be included as one of the plurality of apparatuses. In this case, the battery may be charged when the power unit price is low or the CO 2  emission equivalent of unit power is low, and discharged in the contrary cases. Also, the plurality of apparatuses that supply or consume energy provided in the building may include a gas appliance, in addition to electrical appliances. In this case, the information of both electricity and gas may be included as the energy consumption information to be controlled in the management of the apparatus information, so as to manage the information of the both. 
     Here, the emission equivalent refers to an amount of CO 2  that would be regarded as emitted by the operation of the apparatus, including, for example, an amount of CO 2  that would be emitted from a power plant by generating the power required for the operation of the apparatus. 
     Extraction of Optimum Energy-Saving Control Experience 
     To extract the optimum energy-saving control experience (optimum energy consumption history profile  610 ) from the plurality of energy consumption histories (energy consumption history profiles)  610  in the building (object building  11   x ) in which the energy management apparatus  101  is provided, for example one of the following four criteria [1] to [4] may be employed. 
     The plurality of energy consumption history profiles  610  for extraction may include the following. For example, the second time section  611  ( FIG. 6 ) in each of the energy consumption history profiles  610  for extracting the optimum one therefrom may be the same as one of the second time sections selected as an index for extraction. Also, the total energy consumption  612  of those energy consumption history profiles  610  may be the same as one of the total energy consumption amounts selected as an index for extraction. Thus, the plurality of energy consumption history profiles  610  from which the optimum one is to be extracted corresponds to one or more of such energy consumption history profiles  610 . 
     For example, with respect to a set including the second time section selected as an index for extraction and the total energy consumption selected as an index for extraction, the optimum energy consumption history profile  610  may be extracted from one or more energy consumption history profiles  610  containing that set of the second time section and the total energy consumption. 
     Each of the criteria [1] to criteria [4] employed for extracting the energy consumption history profile  610  is as follows. 
     According to the criteria [ 1 ], the energy consumption history profile  610  is extracted from among one or more energy consumption history profiles  610  containing the second time section  611  that is the same as the second time section selected as the index for extraction. Also, the total energy consumption  612  of the extracted energy consumption history profile  610  is the same as the total energy consumption selected as the index for extraction. Further, the peak energy consumption (subsequently described) in the extracted energy consumption history profile  610  through the first time section which is shorter is of a minimum level. The second time section  611  is the second time unit which is relatively long, for example one day (24 hours). The first time section is the first time unit shorter than the second time unit, for example one minute. 
     More specifically, for example the following calculation may be made with respect to each energy consumption history profile  610 . In other words, the following calculation may be made with respect to each first time section included in the second time section  611  contained in the energy consumption history profile  610  that is the object of the calculation. Thus, with respect to each first time section, the total of the energy consumption amount  6153  of the plurality of pieces of operation history information  615  through that first time section may be calculated. Among the total energy consumption amounts of the first time section thus calculated, the greatest amount may be identified as the peak energy consumption of the energy consumption history profile  610 . Then the energy consumption history profile  610  in which the peak energy consumption thus identified is at the minimum level may be extracted. 
     The criteria [2] may be defined as follows. One or more energy consumption history profiles  610  having the second time section  611  (for example, one day—24 hours) that is the same as the second time section selected as the index for extraction can be assumed to exist. The one or more energy consumption history profiles  610  include, as a part thereof, one or more energy consumption history profiles  610  (mentioned above) in which the total energy consumption  612  is the same as the total energy consumption selected as the index for extraction. Thus, from among such one or more energy consumption history profiles  610  containing the same total energy consumption  612 , the energy consumption history profile  610  in which the energy consumption cost  613  ( FIG. 6 ) is at the minimum level may be extracted. 
     The criteria [3] may be defined as follows. One or more energy consumption history profiles  610  (mentioned above) containing the same total energy consumption  612  through the same second time section can be assumed to exist. Among such one or more energy consumption history profiles  610 , the energy consumption history profile  610  in which the CO 2  emission equivalent  614  ( FIG. 6 ) is at the minimum level may be extracted. 
     The criteria [4] may be defined as follows. One or more energy consumption history profiles  610  (above mentioned) containing the same total energy consumption  612  through the same second time section can be assumed to exist. Among such one or more energy consumption history profiles  610 , the energy consumption history profile  610  in which a mean energy utilization efficiency (subsequently described) of all the apparatuses associated with the total energy consumption  612  is highest may be extracted. The mean energy utilization efficiency may be calculated as follows, for example. The items for the calculation include the total energy consumption  612 , and the energy consumption amount (see energy consumption amount  6153 ) and the energy utilization efficiency (see energy utilization efficiency  6156 ) of each apparatus (operation history information  615  of each operation history information group) in the energy consumption history profile  610  shown in  FIG. 6 . With these items, the following formula may be employed: (energy consumption amount of apparatus  1 ×energy consumption utilization efficiency of apparatus  1 +energy consumption amount of apparatus  2 ×energy consumption utilization efficiency of apparatus  2 + . . . )/total energy consumption. 
     In practical use, which of the criteria [1] to [4] is to be employed may be determined through the setting of the system or selection by the user. 
     In the case of the system  1   a  including the management server  11 M ( FIG. 4 ), the management server  11 M may perform a simulation so as to calculate an optimum energy-saving control method on the basis of one of the criteria specified above. The optimum energy-saving control method thus calculated may be employed as a reference of the optimum energy-saving control experience. 
     The control history processing unit  306  thus extracts the optimum energy consumption history profile  610  (optimum energy-saving control experience), to thereby generate the optimum energy consumption pattern  810  that contains the extracted optimum energy-saving control experience. 
     Transference of Optimum Energy-Saving Control Experience 
     In the first energy management apparatus  101   a , the following process is performed after extracting the optimum energy-saving control experience (energy consumption history profile  610 ) (Sa 1 , Sa 3   x  (Sa 2 , Sa 3 ), Sa 4  in  FIG. 1 ). The process includes storing the extracted energy consumption history profile  610  in the storage unit  202  ( FIG. 2 ,  FIG. 10 ) of the first energy management apparatus  101   a . Then the first energy management apparatus  101   a  transmits the optimum energy consumption pattern  810  containing the stored energy consumption history profile  610  to the second energy management apparatus  101   b  (another energy management apparatus  152  in  FIG. 15 ) in the neighborhood (Sa 5 ). Specifically, the data to be transmitted is the optimum energy consumption pattern  810  generated from the extracted energy consumption history profile  610  and containing that energy consumption history profile  610 , shown in  FIG. 8 . 
     The second energy management apparatus  101   b  in the neighborhood performs the following process. First, the second energy management apparatus  101   b  confirms whether the following optimum energy consumption pattern  810  is stored in the storage unit  202  ( FIG. 2 ,  FIG. 10 ). To be more detailed, the apparatus profile  510  of the optimum energy consumption pattern  810  transmitted from the first energy management apparatus  101   a  (another energy management apparatus  153 ) is stored. Then in this process the second energy management apparatus  101   b  confirms whether an optimum energy consumption pattern  810  having an apparatus profile  510  that is the same as the apparatus profile  510  is stored (Sb 2  (Sb 1  and Sb 2 )). In the affirmative case, the second energy management apparatus  101   b  decides, for example on the basis of the criteria for optimum decision, whether the received optimum energy consumption pattern  810  is superior to the optimum energy consumption pattern  810  stored in the second energy management apparatus  101   b  (Sb 3  in Sb 4   x ). In the case where the received optimum energy consumption pattern  810  is decided to be superior, the second energy management apparatus  101   b  replaces the optimum energy consumption pattern currently stored therein with the received optimum energy consumption pattern (Sb 4  in Sb 4   x ). Such replacement allows the apparatus  12   b  to be controlled in accordance with the received optimum energy consumption pattern. 
     Upon deciding that the received optimum energy consumption pattern is superior, the second energy management apparatus  101   b  transfers, at the same time as the replacing the optimum energy consumption pattern, the received optimum energy consumption pattern  810  to another energy management apparatus  101   e  (energy management apparatus  154  in  FIG. 11 ,  FIG. 15 ) in the neighborhood, other than the first and the second energy management apparatus  101   a ,  101   b.    
     In contrast, in the case where the second energy management apparatus  101   b  has decided that the optimum energy consumption pattern thus far stored in the second energy management apparatus  101   b  is superior, the second energy management apparatus  101   b  does not replace the optimum energy consumption pattern, nor transfer the optimum energy consumption pattern to the energy management apparatus in the neighborhood. 
     Application of Optimum Energy-Saving Control Experience 
     The first energy management apparatus  101   a  performs, upon extracting the optimum energy-saving control experience (energy consumption history profile  610 ), the following process on the basis of the extracted optimum energy-saving control experience. The process includes controlling the apparatus (object apparatus  12   x  in  FIG. 15 ) in the building A (object building  11   x  of the first energy management apparatus  101   a ). 
     Meanwhile, the second energy management apparatus  101   b  in the neighborhood receives the optimum energy consumption pattern  810  containing the apparatus profile  510  similar to the apparatus profile  510  of the second energy management apparatus  101   b . In the case where the second energy management apparatus  101   b  has decided that the received optimum energy consumption pattern  810  is superior to the optimum energy consumption pattern  810  thus far stored in the second energy management apparatus  101   b  on the basis of the criteria for optimum decision, the second energy management apparatus  101   b  performs a process with reference to (the energy consumption history profile  610  contained in) the received optimum energy consumption pattern  810 . This process includes controlling the apparatus (apparatus  12   b , object apparatus  12   x  of the second energy management apparatus  101   b ) of the second energy management apparatus  101   b  referring to the received optimum energy consumption pattern  810  (Sb 4  in Sb 4   x ). 
     Here, the second energy management apparatus  101   b  may obtain the approval of the user of the apparatus (apparatus  12   b ) to be controlled through a predetermined user interface, before executing the control of the apparatus referring to the received optimum energy consumption pattern  810 . 
       FIG. 10  is a block diagram showing the first energy management apparatus  101   a  and the second energy management apparatus  101   b.    
     As shown in  FIG. 10 , the first energy management apparatus  101   a  may include all the functional blocks of, for example, the first energy management apparatus  101  shown in  FIG. 2 . Likewise, the second energy management apparatus  101   b  may also include all the functional blocks of the first energy management apparatus  101  shown in  FIG. 2 , as already mentioned. 
       FIG. 11  is another block diagram showing the first energy management apparatus  101   a  and the second energy management apparatus  101   b.    
       FIGS. 12 and 13  are block diagrams each showing the first energy management apparatus  101   a  ( 101   a   1 ,  101   a   2 ). 
     On the other hand, as shown in  FIGS. 11 to 13 , it is not mandatory that the first energy management apparatus  101   a  include all the functional blocks in the first energy management apparatus  101   a  shown in  FIG. 10 . In other words, the first energy management apparatus  101   a  may only include a part of the functional blocks. 
       FIG. 14  is a block diagram showing the second energy management apparatus  101   b.    
     Likewise, the second energy management&#39;apparatus  101   b  may also include only a part of the functional blocks in the second energy management apparatus  101   b  shown in  FIG. 10 , as shown in  FIG. 14 . 
     Here, the second energy management apparatus  101   b  (energy management apparatus  101 ) according to the embodiment may operate as follows. For example, the control history transmission unit (control history transmission unit  303 ) receives the optimum energy consumption pattern transmitted to the second energy management apparatus  101   b  through the first external communication network (external communication network  103 ), from the first energy management apparatus  101   a  (another energy management apparatus  153  in  FIG. 15 ) that manages the supply and demand of energy outside the building of the second energy management apparatus  101   b  (second building  11   b , object building  11   x ) and in another building (first building  11   a ) adjacent thereto. The control history processing unit (control history processing unit  306 ) compares the received optimum energy consumption pattern with the optimum energy consumption pattern currently stored in the second energy management apparatus  101   b , to thereby decide whether the received optimum energy consumption pattern is superior on the basis of the predetermined criteria. In the affirmative case, the control history transmission unit (control history transmission unit  303 ) transfers the received optimum energy consumption pattern to other energy management apparatuses (energy management apparatus  101   e  in  FIG. 11 , another energy management apparatus  154  in  FIG. 15 ) in other buildings (not shown) adjacent to the building of the second energy management apparatus  101   b  (second building  11   b  in  FIG. 3 ). 
     Further, the following process may be performed. For example, the second energy management apparatus  101   b  includes the apparatus control application unit (apparatus control application unit  307 ), as shown in  FIG. 14 . The control history transmission unit receives the optimum energy consumption pattern containing the apparatus profile from the first energy management apparatus  101   a  (another energy management apparatus  153 ). The control history processing unit makes a second decision, in the case where similarity of the apparatus profile contained in the received optimum energy consumption pattern in comparison with the apparatus profile of the second energy management apparatus  101   b  is not lower than a predetermined threshold, and the received optimum energy consumption pattern is superior to the optimum energy consumption pattern of the second energy management apparatus  101   b  on the basis of predetermined criteria. The apparatus control application unit accepts the received optimum energy consumption pattern as a reference plan for operating the energy-related apparatus (apparatus  12   b  in  FIG. 3 ) in the building of the second energy management apparatus  101   b  (second building  11   b ), when the second decision is made. 
     The second energy management apparatus  101   b  may include the apparatus information processing unit (apparatus information processing unit  301  in  FIG. 14 ) that generates the use environment profile (use environment profile  910  in  FIG. 9 ) on the basis of the building information (building profile  911  in  FIG. 9 ) containing the structure, size, and location of the building of the second energy management apparatus  101   b  (second building  11   b ), the weather information (weather information  913  in  FIG. 9 ) containing the temperature and humidity, and the user information (user profile  912  in  FIG. 9 ) containing the number and feature of users of the energy-related apparatus (apparatus  12   b ) used in the building, and adds the generated use environment profile to the apparatus profile of (the apparatus  12   b  controlled by) the second energy management apparatus  101   b , which is different from the apparatus profile in the received optimum energy consumption pattern. The control history processing unit may also compare, when comparing the apparatus profile in the optimum energy consumption pattern received from the first energy management apparatus  101   a  with the apparatus profile of the second energy management apparatus  101   b , the similarity of the use environment profiles between these two apparatus profiles, and decide to accept the received optimum energy consumption pattern only in the case where the similarity of the use environment profile is not lower than the predetermined threshold. 
     The foregoing process performed by the second energy management apparatus  101   b  may also be performed by the first energy management apparatus  101   a . Specifically, the first energy management apparatus  101   a  ( FIG. 12 ) may transfer the optimum energy consumption pattern  810  received from a first other energy management apparatus  101   c  (another energy management apparatus  153  in  FIG. 12 ) to a second other energy management apparatus  101   d  (another energy management apparatus  154 ). Also, the first energy management apparatus  101   a  ( FIG. 12 ) may perform the control of the apparatus  12   a  of the first building  11   a  based on the optimum energy consumption pattern  810  received from the first other energy management apparatus  101   c  ( FIG. 12 ), or execute the processing of the use environment profile  910 . 
     As described above, a plurality of criteria (for example, criteria [1] to [4]) may be employed. Accordingly, the first energy management apparatus  101   a  may generate the optimum energy consumption pattern  810  through extraction on the basis of a first criteria which is different from a second criteria adopted by the second energy management apparatus  101   b . The optimum energy consumption pattern  810  thus generated may be transmitted to the second energy management apparatus  101   b . Further, the second energy management apparatus  101   b  may perform the control in accordance with the optimum energy consumption pattern  810  generated by the first energy management apparatus  101   a  on the basis of the first criteria. 
     In this case, the second energy management apparatus  101   b  can perform not only the control according to the optimum energy consumption pattern  810  based on the second criteria but also according to the optimum energy consumption pattern  810  generated by the first energy management apparatus  101   a  on the basis of the first criteria. Such an arrangement further ensures that the second energy management apparatus  101   b  can perform an appropriate control. 
     The first energy management apparatus  101   a  may extract the energy consumption history profile  610  on the basis of each of the plurality of criteria. Then the first energy management apparatus  101   a  may transmit a plurality of optimum energy consumption patterns  810  generated from the extraction based on the plurality of criteria to the second energy management apparatus  101   b . The second energy management apparatus  101   b  may select one out of the plurality of optimum energy consumption patterns  810 , and perform the control in accordance with the selected optimum energy consumption pattern  810 . 
     Such an arrangement allows the optimum energy consumption pattern  810  based on the appropriate criteria to be selected even though the first energy management apparatus  101   a  has not adopted the appropriate criteria, thereby enabling the control in accordance with the optimum energy consumption pattern  810  based on the appropriate criteria to be performed. 
     Now, an energy-related apparatus (object apparatus  12   x ) is provided, for example, in the building (object building  11   x  in  FIG. 15 ) in which the energy management apparatus  101  is provided. 
     Examples of the energy-related apparatus provided as above include a photovoltaic power generation system that generates electricity, a power storage system that stores electric power, a hot water tank that stores heat, a heat pump that generates heat, and a fuel cell that generates power and heat. Thus, the energy-related apparatuses that may be provided handle the energy in various manners such as supplying, receiving, consuming, or storing. 
     Normally a plurality of such energy-related apparatuses is provided in the object building  11   x.    
     The energy management apparatus  101  controls each of the plurality of energy-related apparatuses provided in the object building  11   x . Accordingly, the energy management apparatus  101  may constitute a part or whole of, for example, control equipment for a Home Energy Management System (HEMS). 
     The apparatuses (for example, apparatus  12   a , apparatus  12   b  in  FIG. 3 ) may be provided in each of the plurality of buildings (first building  11   a , second building  11   b ). The apparatus thus provided may be controlled by the energy management apparatus  101  (first energy management apparatus  101   a , second energy management apparatus  101   b ) of the building in which the apparatus is provided. 
     In a certain situation, the first energy management apparatus  101   a  may perform the following process. 
     For example, the control history processing unit  306  (see  FIG. 11 ) may generate the optimum energy consumption pattern  810  ( FIG. 8 ). The optimum energy consumption pattern  810  thus generated may indicate the type of the energy-related apparatus (type of apparatus  5121  in  FIG. 5 ) and a first control detail (operation history information  615 ) for that energy-related apparatus more appropriate than a second control detail. 
     Then the control history transmission unit  303  may transmit the generated optimum energy consumption pattern  810  to the second energy management apparatus  101   b  (see  FIG. 11 ). 
     On the part of the second energy management apparatus  101   b , the following process may be performed in a certain situation. 
     The control history transmission unit  303  may receive the optimum energy consumption pattern  810  transmitted by the control history transmission unit  303  of the first energy management apparatus  101   a.    
     The apparatus control application unit  307  may control, upon receipt of the optimum energy consumption pattern  810 , the apparatus  12   b  in accordance with the first control detail indicated by the optimum energy consumption pattern  810 , without performing the control in accordance with the second control detail. 
     To be more detailed, when the optimum energy consumption pattern  810  is received, the type of apparatus indicated by the received optimum energy consumption pattern  810  may or may not agree with the type of the apparatus  12   b . The apparatus control application unit  307  may be kept from controlling the apparatus  12   b  in accordance with the first control detail in the case where the type of apparatus indicated by the received optimum energy consumption pattern  810  is not that of the apparatus  12   b , but may perform the control in the case where the type of apparatus is the same. 
     Also, when the optimum energy consumption pattern  810  is received, for example the location of the first building  11   a  of the first energy management apparatus  101   a  indicated by the received optimum energy consumption pattern  810  may not be in the neighborhood area of the second building  11   b . The apparatus control application unit  307  may be kept from performing the control in accordance with the first control detail, but may perform the control in accordance with the second control detail. 
     Alternatively, the control history processing unit  306  may decide whether the location of the first building  11   a  indicated by the received optimum energy consumption pattern  810  is within the neighborhood area. 
     In the case where the apparatus control application unit  307  has not decided that the location of the first building  11   a  is within the neighborhood area, the control in accordance with the second control detail may be performed, not in accordance with the first control detail. 
     Thus, managing the (supply and demand of the) energy may be construed as controlling the operation of the energy-related apparatuses that handle the energy. 
     The term “adjacent” includes the case where the region of a building abuts the region of another building, and where the region of a building is within a predetermined vicinity of the region of another building. 
     The “energy consumption history” about the consumed energy may be, for example, information indicating the consumed energy (energy consumption history). 
     The “total CO 2  emission equivalent” of the second time unit refers to, for example, a total amount of the CO 2  emission equivalent of each hour of the second time unit. 
     The optimum energy consumption pattern stored in the energy management apparatus refers to, for example, the optimum energy consumption pattern of the energy management apparatus generated through the operation of the object apparatus  12   x  under the control of the energy management apparatus. 
     The management server  11 M may receive, for example, the data to be transmitted by the first energy management apparatus  101   a  to the second energy management apparatus  101   b  (for example, optimum energy consumption pattern). The management server  11 M may also store the received data. The data thus stored may be received by the second energy management apparatus  101   b.    
     The expression “accept and execute the optimum energy consumption pattern” refers to, for example, performing the control utilizing the optimum energy consumption pattern as reference, in other words performing the control in accordance with the control detail indicated by the optimum energy consumption pattern. 
     The details about the similarity of the use environment profile are similar to the example described about the similarity of the apparatus profile. 
       FIG. 16  is a block diagram showing an example of the system  1 . 
     The control history transmission unit of the second energy management apparatus  101   b  (energy management apparatus  101 ) may identify, among the plurality of energy management apparatuses  101  (for example, energy management apparatuses  101   h ,  101   i  in  FIG. 16 ), the energy management apparatus  101  ( 101   h ) in the neighborhood area  101   b R ( FIG. 16 ) of the second energy management apparatus  101   b  as the first energy management apparatus  101   a  from which the optimum energy consumption pattern  810  is received. Then the optimum energy consumption pattern  810   h  ( FIG. 16 ) may be received from the first energy management apparatus  101   a  thus identified. 
     The second building  11   b  may be located, for example, in a downtown commercial area where many stores are open at night or midnight and hence the power consumption at night is higher (see  FIG. 16 ). 
     The first building  11   a  may be a building (building  11   h ) other than the second building  11   b , located within the neighborhood area  101   b R (commercial area) of the second building  11   b.    
     Under such a setting, the first energy management apparatus  101   a  in the first building  11   a  may transmit the optimum energy consumption pattern  810  ( 810   h  in  FIG. 16 ) indicating the first control detail which is more appropriate than the second control detail in the case of controlling the building that consumes more energy at night, in other words the building in the downtown area (first building  11   a , second building  11   b ). 
     The first energy management apparatus  101   a  may identify the control detail relatively more frequently employed in the first building  11   a  as the first control detail. The control detail frequently employed may be, for example, those frequently adopted in the first building  11   a  through the instruction of the habitants in the first building  11   a.    
     The term “control detail” refers to, for example, information that specifies the type of operation of the energy-related apparatus, such as an operation mode or operation hour. Thus, the control detail may be such information utilized in known techniques. 
     In the second energy management apparatus  101   b , the control history processing unit  306  may detect that the second energy management apparatus  101   b  has been installed in the second building  11   b . More specifically, for example, the user may input the information of the installation. 
     Upon detecting the installation, the control history processing unit  306  may identify the location of the second building lib (see  FIG. 16 ) in which the second energy management apparatus  101   b  has been installed. This identification may be performed by an input of the user indicating the location. 
     Then the control history processing unit  306  may identify the neighborhood area of the identified location as the neighborhood area  101   b R ( FIG. 16 ) of the second building  11   b . This identification may be performed by acquiring data of neighborhood area associated with the identified location, from a server (for example, server  11   b S in  FIG. 16 ) containing data of locations and the corresponding neighborhood area thereof. Here, the server  11   b S may be the server  11 U s  shown in  FIG. 3 . 
     The data for identifying the neighborhood area (location of the second building  11   b ) may be inputted by the user. By such inputting, the neighborhood area identified on the basis of the inputted data may be identified as the neighborhood area  101   b R of (the second building lib including) the second energy management apparatus  101   b.    
     Then the control history processing unit  306  may identify the energy management apparatus  101  ( 101   h ) of the building  11   a  in the identified neighborhood area  101   b R (downtown are a ) as the first energy management apparatus  101   a , from among the plurality of energy management apparatus  101  (for example, energy management apparatus  101   h  and energy management apparatus  101   i  in  FIG. 16 ) connected to the second energy management apparatus  101   b  through the external communication network  103 . In other words, the energy management apparatus  101  ( 101   i ) of the building  11   i  in an outside area  101   i R relatively far from the neighborhood area  101   b R does not have to be identified as the first energy management apparatus  101   a.    
     For example, the control history processing unit  306  of the second energy management apparatus  101   b  may receive the location of the energy management apparatus  101  connected thereto, from each of one or more energy management apparatuses  101  ( 101   h ,  101   i ) connected thereto. The control history processing unit  306  may then decide whether the received location is within the identified neighborhood area  101   b R. In the affirmative case, the energy management apparatus  101  ( 101   h ) connected to the second energy management apparatus  101   b  and decided to be located within the neighborhood area  101   b R may be identified as the first energy management apparatus  101   a . The location received from the energy management apparatus  101  ( 101   h ,  101   i ) may be the location transmitted thereto from the server  11   b S. 
     The apparatus control application unit  307  may perform the control in accordance with the first control detail indicated by the optimum energy consumption pattern  810  ( 810   h  in  FIG. 16 ) received from the identified first energy management apparatus  101   a  ( 101   h ), without performing the control in accordance with the second control detail which is different from the first control detail. More precisely, for example, the control in accordance with the first control detail may be relatively frequently performed, and the control in accordance with the second control detail may be less frequently performed. Here, the second control detail is for example the control detail indicated by the optimum energy consumption pattern  810  ( 810   i  in  FIG. 16 ) generated by the energy management apparatus  101   i  in the outside area  101   i R, which has not been identified as the first energy management apparatus  101   a  in the foregoing process. 
     The above mentioned process may be performed as follows. 
     In the neighborhood area  101   b R, the optimum energy consumption pattern  810   h  generated by the energy management apparatus  101   h  located therein is sufficiently appropriate. 
     On the other hand, in the neighborhood area  101   b R the optimum energy consumption pattern  810   i  generated by the energy management apparatus  101   i  located in the outside area  101   i R is not sufficiently appropriate. 
     The term “sufficiently appropriate” refers to the case where, for example, the optimum energy consumption pattern is sufficiently appropriate for being utilized by the second energy management apparatus  101   b.    
     When the system  1  is to be set up, an experiment may be performed. The neighborhood area  101   b R may be the area proven to be appropriate through the experiment. 
     The arrangement thus far described allows the second energy management apparatus  101   b  to perform the control in accordance with the appropriate energy consumption pattern  810  (energy consumption pattern  810   h  in  FIG. 16 ), without the need for the user of the second energy management apparatus  101   b  to perform complicated settings. Thus, appropriate controls can be easily performed. 
     Furthermore, the optimum energy consumption pattern  810   h  is generated by the apparatus in the neighborhood area  101   b R (downtown are a ) and different from the optimum energy consumption pattern  810   i  generated in the outside area  101   i R (outside the downtown are a ), and is hence sufficiently appropriate. Thus, the appropriateness can be enhanced. 
     Consequently, while an appropriate control can be easily executed, the executed control can be sufficiently appropriate. 
     Further, the appropriate operation can be performed not only in the first building  11   a  but also in the second building  11   b , and therefore the appropriate operation can be performed in a greater number of buildings. This leads to more efficient reduction of CO 2  emission. 
     Thus, as already described, the energy-saving control experience information (optimum energy consumption pattern  810   h ) can be shared by the plurality of buildings (two buildings  11   b ,  11   h ) in the same area (neighborhood area  101   b R). 
     Therefore, the control in accordance with the appropriate control detail can be rapidly, easily, and surely performed, also in the second building  11   b.    
     In each of the first energy management apparatus  101   a  and the second energy management apparatus  101   b , a plurality of combinations of the control history transmission unit  303  and so forth can be established. Such combinations can create synergistic effects. In contrast, the conventional techniques lack in one or more of the foregoing configurations, and hence the synergistic effect cannot be expected. In this aspect, the first energy management apparatus  101   a  and the second energy management apparatus  101   b  are distinct from the conventional techniques. 
     To realize one or more of the foregoing functions, a computer program may be developed; a storage medium containing the computer program may be made up; and an integrated circuit for performing the functions may be made up. 
     Minor details of the system  1  may be realized in any form among numerous appropriate forms. For example, a form that can be easily reached by those skilled in the art may be adopted for those details, or a form that cannot be easily conceived such as an improvement invention may be adopted. In either case, a system to which the present invention is applied is included in the scope of the system  1 . 
     Further, the present invention provides an instruction method that allows an optimum energy-saving control experience with respect to a plurality of apparatuses in a building to be automatically and rapidly shared in a certain area. 
     Although the present invention has been described with reference to the foregoing embodiment, it is to be understood that the present invention is in no way limited to the embodiment, but various modifications may be made within the scope and spirit of the present invention. 
     INDUSTRIAL APPLICABILITY 
     The energy management apparatus, and the instruction method of the energy-saving control experience of the energy management apparatus according to the present invention provide the advantage that the energy-saving control experience can be shared (first and second energy management apparatus  101   a ,  101   b  in  FIG. 16 ) in a certain area (for example, neighborhood area  101   b R in  FIG. 16 ), and is useful as both apparatus and method for suppressing energy consumption and reduction of CO 2  emission. The method disclosed above is applicable not only to an area but also to a larger range where sufficient similarity is secured, and to office buildings in addition to houses. 
     REFERENCE SIGNS LIST 
       101  Energy management apparatus 
       201  CPU 
       202  Storage unit 
       203  Communication I/F 
       301  Apparatus information processing unit 
       302  Apparatus operation processing unit 
       303  Control history transmission unit 
       304  Utility information processing unit 
       305  Energy consumption history management unit 
       306  Control history processing unit 
       307  Apparatus control application unit 
       311  Apparatus energy consumption information storage unit 
       11 U Utility company 
       11 M Management server