Arithmetic operation device, plant, arithmetic operation method and program

An arithmetic operation device includes a performance calculation unit that is configured to calculate performance of a plant before introduction of a part and the performance of the plant after the introduction of the part for each of combinations of a plurality of loads in the plant and a plurality of atmospheric temperatures around the plant, a storage unit that is configured to store a data table indicating a percentage of an operating time of the plant for each of the combinations, and a performance improvement calculation unit that is configured to calculate, on the basis of a calculation result in the performance calculation unit and the data table, how much the performance of the plant is improved compared with the performance before the introduction of the part in a case where the part is introduced and the plant is operated at the percentage indicated by the data table.

TECHNICAL FIELD

The present invention relates to an arithmetic operation device, a plant, an arithmetic operation method, and a program.

Priority is claimed on Japanese Patent Application No. 2019-119584, filed Jun. 27, 2019, the content of which is incorporated herein by reference.

BACKGROUND ART

In plants that generate electric power (hereinafter referred to as “power plants”), parts (including devices) may be replaced or added.

Patent Literature 1 discloses a technique related to plant upgrade as a related technique.

CITATION LIST

Patent Literature

SUMMARY OF INVENTION

Technical Problem

Incidentally, as parts to be replaced or added in a power plant, there are often a plurality of types differing in performances and prices even though they have the same function. Therefore, there is a need for a technique that makes it possible to quantitatively and easily ascertain how much the performance of a plant will be improved when new parts are introduced compared with the performance before the introduction of the new parts.

An object of the present invention is to provide an arithmetic operation device, a plant, an arithmetic operation method and a program capable of solving the above problems.

Solution to Problem

According to a first aspect of the present invention. an arithmetic operation device is provided, including a performance calculation unit that is configured to calculate performance of a plant before introduction of a part and the performance of the plant after the introduction of the part for each of combinations of a plurality of loads in the plant and a plurality of atmospheric temperatures around the plant; a storage unit that is configured to store a data table indicating a percentage of an operating time of the plant for each of the combinations; and a performance improvement calculation unit that is configured to calculate, on the basis of a calculation result in the performance calculation unit and the data table, how much the performance of the plant is improved compared with the performance before the introduction of the part in a case where the part is introduced and the plant is operated at the percentage indicated by the data table.

In a second aspect of the present invention, the arithmetic operation device according to the first aspect may further include a performance improvement result output unit that is configured to output the calculation result in the performance improvement calculation unit.

According to a third aspect of the present invention, in the arithmetic operation device of the first aspect or the second aspect, the performance of the plant may include at least one of heat rate of the plant, remaining life of the plant, and a reduction amount of gas emitted by the plant.

According to a fourth aspect of the present invention, in the arithmetic operation device of any one of the first aspect to the third aspect, in a case where a plurality of the parts are introduced, the performance calculation unit may calculate the performance of the plant by using a coefficient indicating a degree of influence of a combination of the parts on the performance of the plant.

According to a fifth aspect of the present invention, a plant is provided, including the arithmetic operation device of any one of the first aspect to the fourth aspect; and a power generation device that is configured to supply electric power according to the load.

According to a sixth aspect of the present invention, an arithmetic operation method is provided, including calculating performance of a plant before introduction of a part and the performance of the plant after the introduction of the part for each of combinations of a plurality of loads in the plant and a plurality of atmospheric temperatures around the plant; storing a data table indicating a percentage of an operating time of the plant for each of the combinations; and calculating, on the basis of a calculation result of the performance of the plant and the data table, how much the performance of the plant is improved compared with the performance before the introduction of the part in a case where the part is introduced and the plant is operated at the percentage indicated by the data table.

According to a seventh aspect of the present invention, a program is provided causing a computer to execute calculating performance of a plant before introduction of a part and the performance of the plant after the introduction of the pail for each of combinations of a plurality of loads in the plant and a plurality of atmospheric temperatures around the plant; storing a data table indicating a percentage of an operating time of the plant for each of the combinations; and calculating, on the basis of a calculation result of the performance of the plant and the data table, how much the performance of the plant is improved compared with the performance before the introduction of the part in a case where the part is introduced and the plant is operated at the percentage indicated by the data table.

Advantageous Effects of invention

According to the arithmetic operation device, the plant, the arithmetic operation method, and the program according to the embodiment of the present invention, it is possible to quantitatively and easily ascertain how much the performance of a plant is improved when a new part is introduced compared with the performance before the introduction of the new part.

DESCRIPTION OF EMBODIMENTS

Embodiments

A configuration of a plant1according to an embodiment of the present invention will be described.

The plant1is a power plant that generates electric power with, for example, a gas turbine combined cycle (GTCC), that is, generates electric power a first time with a gas turbine by using natural gas or the like as a raw material, uses exhaust heat to generate steam, and generates electric power a second time with a steam turbine by using the steam.

As illustrated inFIG.1. the plant1includes a power generation device10, a temperature sensor20, and an arithmetic operation device30.

The power generation device10generates electric power with a gas turbine and a steam turbine.

The temperature sensor20is provided around the plant1and detects the temperature around the plant1.

The arithmetic operation device30is a device that, in a case where the plant1is upgraded, that is, a new part (such as a device) is introduced into the plant1(in a case where a part is replaced, a new part is added, or the like), calculates how much the performance of the plant1is improved compared with the performance before the introduction of the new part. The number of parts to be introduced may be one or a plurality.

As illustrated inFIG.2, the arithmetic operation device30includes a storage unit301, a performance calculation unit302. a performance improvement calculation unit303, and a performance improvement result output unit304.

The storage unit301stores various types of information necessary for a process performed by the arithmetic operation device30.

For example, the storage unit301stores a data table TBL1illustrated inFIG.3. The data table TBL1indicates a percentage of an operating time of the plant1for each of combinations of a plurality of representative loads in the plant1and a plurality of representative atmospheric temperatures around the plant1during an operation in a predetermined period (for example, an operation schedule for the past year or the next month).

For example, the storage unit301stores a data table TBL2illustrated inFIG.4. Details of the data table TBI2will be described later.

For example, the data table TBL I illustrated inFIG.3indicates operation results of the plant1for the past year. This data table TBL1indicates that, in the total operating time in the past year, a percentage of the time for which the plant1was operated under the conditions that the atmospheric temperature was 5° C. or higher and lower than 10° C. and the load was 50% or higher and lower than 60% of the maximum load was 5%. the percentage of the time for which the plant1was operated under the conditions that the atmospheric temperature was 5° C.′ or higher and lower than 10° C. and the load was 90% or higher and lower than 100% of the maximum load was 12%, the percentage of the time for which the plant1was operated under the conditions that the atmospheric temperature was 5° C. or higher and lower than 10° C. and the load was 100% of the maximum load was 20%, the percentage of the time for which the plant1was operated under the conditions that the atmospheric temperature was 10° C. or higher and lower than 15° C. and the load was 50% or higher and lower than 60% of the maximum load was 13%. the percentage of the time for which the plant1was operated under the conditions that the atmospheric temperature was 10° C. or higher and lower than 15° C. and the load was 100% of the maximum load was 15%, the percentage of the time for which the plant1was operated under the conditions that the atmospheric temperature was 35° C. or higher and 40° C. or lower and the load was 50% or higher and lower than 60% of the maximum load was 15%, and the percentage of the time for which the plant1was operated under the conditions that the atmospheric temperature was 35° C. or higher and 40° C. or lower and the load was 100% of the maximum load was 20%.

Representative values may be used for each of the above atmospheric temperatures and loads. For example, as a representative value, 2.5° C. may be used in a case where the atmospheric temperature is 0° C. or higher and lower than 5° C., 7.5° C. may be used in a case where the atmospheric temperature is 5° C. or higher and lower than 10° C. 12.5° C. may he used in a case where the atmospheric temperature is 10° C. or higher and lower than 15° C., and 37.5° C. may be used in a case where the atmospheric temperature is 35° C. or higher and 40° C. or lower. In addition, as a representative value, 45% may be used in a case where the load is 40% or higher and lower than 50% of the maximum load, 55% may be used in a case where the load is 50% or higher and lower than 60% of the maximum load, 65% may be used in a case where the load is 60% or higher and lower than 70% of the maximum load, 75% may be used in a case where the load is 70% or higher and lower than 80% of the maximum load, 85% may be used in a case where the load is 80% or higher and lower than 90% of the maximum load, and 95% may be used in a case where the load is 90% or higher and lower than 100% of the maximum load.

The performance calculation unit302calculates the performance of the plant1before the introduction of a part and the performance of the plant1after the introduction of the part for the same combination as each of the combinations of the plurality of representative loads and the plurality of representative atmospheric temperatures in the data table TBL1illustrated inFIG.3. The performance of the plant1here is the heat rate of the plant1(including an output power amount and a power generation efficiency), the remaining life of the plant1, a reduction amount of a gas such as NOx emitted by the plant1, or the like.

For example, the performance calculation unit302prepares a model parameter for each part configuring the plant1. The performance calculation unit302executes a simulation of the performance of the plant1for the same combinations as those of the loads and the atmospheric temperatures in the data table TBL1by using parameters for each part before the introduction of the new part. The performance calculation unit302executes simulation of the performance of the plant1for the same combinations as those of the loads and the atmospheric temperatures in the data table TBL1by using parameters for each part after the introduction of the new part.

The performance calculation unit302executes simulation of the performance of the plant1by using, for example, an application for simulating the performance of the plant1(for example, EBSILON (registered trademark) capable of evaluating the performance of various power plants).

The performance improvement calculation unit303acquires a simulation result in the performance calculation unit302. The performance improvement calculation unit303calculates a percentage of a simulation result of the performance of the plant1using the parameter for each part after the introduction of the new part when a simulation result of the performance of the plant1using the parameter for each part before the introduction of the new part is set to 100%. The performance improvement calculation unit303records the calculated result in the storage unit301as, for example. the data table TBL2illustrated inFIG.4. The data table TBL2indicates how much the performance of the plant1is improved compared with the performance before the introduction of a new part in a case where the new part is introduced into the plant1for each of combinations of a plurality of representative loads and a plurality of representative atmospheric temperatures around the plant1during an operation for a predetermined period (for example, an operation schedule for the past year or the next month).

For example, the data table TBL2illustrated inFIG.4indicates that: in a case where a new part was introduced and the plant1was operated under the conditions that the atmospheric temperature was 5° C. or higher and lower than 10° C. and the load was 50% or higher and lower than 60% of the maximum load. the performance of the plant1was improved by 1% compared with the performance before the introduction of the part; in a case where the plant1was operated under the conditions that the atmospheric temperature was 5° C. or higher and lower than 10° C. and the load was 90% or higher and lower than 100% of the maximum load, the performance of the plant1was the same as the performance before the introduction of the part; in a case where the plant1was operated under the conditions that the atmospheric temperature was 5° C. or higher and lower than 10° C. and the load was 100% of the maximum load, the performance of the plant1was improved by 3% compared with the performance before the introduction of the part; in a case where the plant1was operated under the conditions that the atmospheric temperature was 10° C. or higher and lower than 15° C. and the load was 50% or higher and lower than 60% of the maximum load, the performance of the plant1was improved by 1% compared with the performance before the introduction of the part; in a case where the plant1was operated under the conditions that the atmospheric temperature was 10° C. or higher and lower than 15° C. and the load was 100% of the maximum load, the performance of the plant1was improved by 1% compared with the performance before the introduction of the part; in a case where the plant1was operated under the conditions that the atmospheric temperature was 35° C. or higher and 40° C. or lower and the load was 50% or higher and lower than 60% of the maximum load, the performance of the plant1was reduced by 1% compared with the performance before the introduction of the part; and in a ease where the plant1was operated under the conditions that the atmospheric temperature was 35° C. or higher and 40° C. or lower and the load was 100% of the maximum load, the performance of the plant1was the same as the performance before the introduction of the part.

The performance improvement calculation unit303multiplies the value in the data table TBL1and the value in the data table TBL2for each combination of the load and the atmospheric temperature. The performance improvement calculation unit303calculates a total sum of the multiplication results.

For example, in the ease of the data table TBL1illustrated inFIG.3and the data table TBL2illustrated inFIG.4, the performance improvement calculation unit303calculates 0.05·1.01=0.0505 with respect to the conditions that the atmospheric temperature is 5° C. or higher and lower than 10° C. and the load is 50% or higher and lower than 60% of the maximum load. The performance improvement calculation unit303calculates 0.12·1.00=0.12 with respect to the conditions that the atmospheric temperature is 5° C. or higher and lower than 10° C. and the load is 90% or higher and lower than 100% of the maximum load. The performance improvement calculation unit303calculates 0.20·1.03=0.2060 with respect to the conditions that the atmospheric temperature is 5° C. or higher and lower than 10° C. and the load is 100% of the maximum load. The performance improvement calculation unit303calculates 0.13·1.01=0.1313 with respect to the conditions that the atmospheric temperature is 10° C. or higher and lower than 15° C. and the load is 50% or higher and lower than 60% of the maximum load. The performance improvement calculation unit303calculates 0.15·1.01=0.1515 with respect to the conditions that the atmospheric temperature is 10° C. or higher and lower than 15° C. and the load is 100% of the maximum load. The performance improvement calculation unit303calculates 0.15·0.99=0.1485 with respect to the conditions that the atmospheric temperature is 35° C. or higher and 40° C. or lower and the load is 50% or higher and lower than 60% of the maximum load. The performance improvement calculation unit303calculates 0.20·1.00=0.20 with respect to the conditions that the atmospheric temperature is 35° C. or higher and 40° C. or lower and the load is 100% of the maximum load. The performance improvement calculation unit303calculates a total sum of these products as 0.0505+0.12+0.2060+0.1313+0.1515+0.1485+0.20=1.0078. That is, in a case where a new part is introduced and the same operation as in the past year is performed, the performance improvement calculation unit303calculates the result indicating that the performance of the plant1is expected to be able to be improved by 0.78% from the data table TBL1and the data table TBL2.

The performance improvement result output unit304outputs the calculation result in the performance improvement calculation unit303.

For example, the performance improvement result output unit304displays the calculation result in the performance improvement calculation unit303on a display device.

The output of the calculation result in the performance improvement calculation unit303performed by the performance improvement result output unit304is not limited to displaying the calculation result on the display device. For example, the performance improvement result output unit304may print out the calculation result in the performance improvement calculation unit303as printed matter from a printer. For example. the performance improvement result output unit304may output the calculation result in the performance improvement calculation unit303by voice from a speaker.

As described above, the performance improvement result output unit304notifies a customer of the calculation result in the performance improvement calculation unit303. In this way, the customer can use the calculation result in the performance improvement calculation unit303as a judgment material for introducing a new part. such as judging that it is more profitable to introduce a new part in a case where the profit obtained through the improvement in the performance of the plant1is larger than a difference between a case of introducing a new part and a case of introducing the same pail as before the introduction of the new part on the basis of the calculation result in the performance improvement calculation unit303.

Next, the process of the plant1will be described with reference toFIG.5.

It is assumed that the storage unit301stores the data table TBL1.

The performance calculation unit302calculates the performance of the plant1before the introduction of a part and the performance of the plant1after the introduction of the part for the same combination as each of the combinations of the plurality of representative loads and the plurality of representative atmospheric temperatures in the data table TBL1(step S1).

For example, the performance calculation unit302prepares a model parameter for each part configuring the plant1. The performance calculation unit302executes simulation of the performance of the plant1for the same combinations as those of the loads and the atmospheric temperatures in the data table TBL1by using parameters for each new part before the introduction of the part. The performance calculation unit302executes simulation of the performance of the plant1for the same combinations as those of the loads and the atmospheric temperatures in the data table TBL1by using parameters for each part after the introduction of the new part.

The performance calculation unit302executes simulation of the performance of the plant1by using, for example, an application for simulating the performance of the plant1.

The performance improvement calculation unit303acquires a simulation result in the performance calculation unit302. The performance improvement calculation unit303calculates a percentage of a simulation result of the performance of the plant1using the parameter for each new part after the introduction of the part with a simulation result of the performance of the plant1using the parameter for each part before the introduction of the new part as 100% (step S2). The performance improvement calculation unit303records the calculated result in the storage unit301as the data table TBL2(step S3).

The performance improvement calculation unit303multiplies the value in the data table TBL1and the value in the data table113L2for each combination of the load and the atmospheric temperature (step S4). The performance improvement calculation unit303calculates a total sum of these products (step S5).

The performance improvement result output unit304outputs the calculation result in the performance improvement calculation unit303(step S6).

For example, the performance improvement result output unit304displays the calculation result in the performance improvement calculation unit303on a display device.

The plant1according to the embodiment of the present invention has been described above.

In the arithmetic operation device30of the plant1, the performance calculation unit302calculates the performance of the plant1before the introduction of a part and the performance of the plant1after the introduction of the part for each of combinations of a plurality of loads in the plant1and a plurality of atmospheric temperatures in the plant1. The storage unit301stores a data table indicating an operating percentage of the plant1for each of the combinations. The performance improvement calculation unit303calculates, on the basis of the calculation result in the performance calculation unit302and the data table, how much the performance of the plant1is improved compared with the performance before the introduction of a part in a case where the part is introduced and the plant1is operated at the percentage indicated by the data table.

In general, the performance improvement in a case of introducing a new part may be obtained by setting actual conditions of the plant, which change from moment to moment, in detail in simulation and performing simulation of transient analysis. Thus, the simulation takes time, and in a case of a large-scale plant. there are many difficulties such as the simulation not converging.

However, in the plant1described in the embodiment of the present invention, the arithmetic operation device30performs simulation on a plurality of combinations of loads and atmospheric temperatures, and thus it is possible to quantitatively and easily ascertain how much the performance of the plant when a new part is introduced is improved compared with the performance before the introduction of the new part.

It has been described that the plant1according to the embodiment of the present invention includes the temperature sensor20, the temperature sensor20detects the temperature around the plant1, and the arithmetic operation device30acquires the temperature detected by the temperature sensor20. However, there may be a configuration in which the plant1according to another embodiment of the present invention does not include the temperature sensor20. and the arithmetic operation device30acquires temperature information around the plant1via the Internet such as a weather forecast website.

In the plant1according to the embodiment of the present invention, it has been described that the atmospheric temperature has a range of 5° C. and the load has a range of 10% of the maximum load in the data table TBL1and the data table TBL2. However, ranges in the data table TBL1and the data table TBL2are not limited thereto.

In the plant1according to the embodiment of the present invention, it has been described that the number of new parts may be one or a plurality, and the arithmetic operation device30changes the parameters for all the new parts and calculates the performance of the plant1.

Regarding the processes according to the embodiment of the present invention, the order of the processes may be changed as long as an appropriate process is performed.

Each of the storage unit301and the other storage devices in the embodiment of the present invention may be provided anywhere as long as appropriate information is transmitted and received. Each of the storage unit301and the other storage devices may be provided in a plurality of areas and store data in a distributed manner as long as appropriate information is transmitted and received.

Although the embodiment of the present invention has been described. the above-described arithmetic operation device30and other control devices may have a computer system inside. The processing procedure is stored in a computer-readable recording medium in the form of a program. and the above process is performed by the computer reading and executing this program. A specific example of a computer will be described below.

FIG.6is a schematic block diagram illustrating a configuration of a computer according to at least one embodiment.

As illustrated inFIG.6. a computer5includes a CPU6, a main memory7, a storage8, and an interface9.

For example, each of the above arithmetic operation device30and other control devices is mounted on the computer5. The operation of each processing unit described above is stored in the storage8in the form of a program. The CPU6reads a program from the storage8, loads the program to the main memory7, and executes the above process according to the program. The CPU6secures a storage area corresponding to each of the above storage units in the main memory7according to the program.

Examples of the storage8include a hard disk drive (HDD), a solid-state drive (SSD), a magnetic disk, a magnetooptical disk, a compact disc read-only memory (CD-ROM), a digital versatile disc read-only memory (DVD-ROM), and a semiconductor memory. The storage8may be an internal medium directly connected to a bus of the computer5, or an external medium connected to the computer5via the interface9or a communication line. In a case where this program is distributed to the computer5via the communication line, the computer5that receives the distributed program may load the program to the main memory7and execute the above process. In at least one embodiment, the storage8is a non-transitory tangible storage medium.

The above program may realize some of the above functions. The program may be a tile that can realize the above functions in combination with a program already recorded in the computer system, that is, a so-called difference file (difference program).

Although some embodiments of the present invention have been described, these embodiments are examples and do not limit the scope of the invention. Various additions, omissions, replacements, and changes may be made to these embodiments without departing from the concept of the invention.

INDUSTRIAL APPLICABILITY

According to the arithmetic operation device, the plant. the arithmetic operation method, and the program of the embodiment of the present invention, it is possible to quantitatively and easily ascertain how much the performance of a plant when a new part is introduced is improved compared with the performance before the introduction of the new part.

REFERENCE SIGNS LIST