Patent Publication Number: US-2017370349-A1

Title: System and Method for Adjusting Environmental Operating Conditions Associated with Heat Generating Components of a Wind Turbine

Description:
FIELD OF THE INVENTION 
     The present subject matter relates generally to systems and methods for adjusting environmental operating conditions associated with heat generating components of a wind turbine and, more particularly, to a split heat exchange system for controlling the operating temperature associated with the heat generating components and/or for controlling the dew point temperature of the air surrounding such components. 
     BACKGROUND OF THE INVENTION 
     Wind power is considered one of the cleanest, most environmentally friendly energy sources presently available, and wind turbines have gained increased attention in this regard. A modern wind turbine typically includes a tower, a nacelle rotatably supported on the tower, a generator housed in the nacelle, and one or more rotor blades. The rotor blades capture kinetic energy from wind using known airfoil principles, and transmit the kinetic energy through rotational energy to turn a shaft that couples the rotor blades to a gearbox, or if a gearbox is not used, directly to the generator. The generator then converts the mechanical energy to electrical energy that may be deployed to a utility grid. With the growing interest in wind generated electricity, considerable efforts have been made to develop wind turbines that are reliable and efficient. 
     A wind turbine typically includes numerous mechanical and electrical components that generate heat energy losses during their operation. These components include, for example, the gearbox (if provided) and generator that are typically housed in the nacelle. Other heat generating components may be housed within the tower. For example, power conversion equipment, such as a converter, a transformer and/or other power conversion components, are typically located in the tower and are utilized to feed electrical energy converted from the mechanical energy of the rotor via the generator to the grid. In addition, one or more controllers for controlling operation of the wind turbine are typically arranged within the tower. 
     Due to the increased performance and size of modern wind turbines, effective cooling of the above-mentioned components is becoming increasingly difficult, particularly with respect to the heat generating components within the tower. For example, it has been estimated that for a converter control system operating in a 1.5 MW turbine, about 60 kW is dissipated in heat by the converter. As such, placement of the converter within the turbine tower without adequate cooling can result in a significant temperature rise within the tower, which may be detrimental to the power conversion components, the control system components and/or other components located within the tower. 
     Typically, the heat generating components in the tower are arranged within a cooling airstream generated by fans. The components may include a heat sink that collects the generated heat, with the heat sink placed directly in the airstream. The heated air rises in the tower and is typically exhausted through vents near the top of the tower. The tower may include additional vents, for example in the tower entry door, to allow the passage of outside air into the lower portion of the tower. However, even with this type of arrangement, it is often difficult to feed enough external air into the tower for sufficient cooling of the tower-based components. 
     In addition to the issues associated with cooling the heat generating components within the tower to avoid overheating, humidity levels within the tower may often be problematic. For example, in some instances, power conversion equipment is shut down during the night due to a lack of wind. In such instances, if the wind turbine is located in an environment that has high humidity levels and/or that exhibits large swings in temperature from hot-to-cold during the daytime/nighttime hours, there is often a significant risk of condensation forming on the power conversion components. To avoid electrical short circuits and other associated issues, the power conversion components must be dry or otherwise free from condensation upon start-up of the power conversion equipment. 
     Accordingly, an improved system and method for adjusting environmental operating conditions associated with heat generating components of a wind turbine to address issues of overheating and/or condensation formation would be welcomed in the technology. 
     BRIEF DESCRIPTION OF THE INVENTION 
     Aspects and advantages of the invention will be set forth in part in the following description, or may be obvious from the description, or may be learned through practice of the invention. 
     In one aspect, the present subject matter is directed to a system for adjusting environmental operating conditions associated with heat generating components located within a tower of a wind turbine. The system may include a heat generating component located within an interior of the tower, a sensor configured to monitor a heat exchange parameter associated with the wind turbine and a split heat exchange system provided relative to the tower. The split heat exchange system may include a first heat exchanger located within the interior of the tower and a second heat exchanger located exterior to the tower, with the first and second heat exchangers being fluidly coupled to one another by fluid lines to allow a heat exchange fluid to be cycled between the first and second heat exchangers. The system may also include a controller communicatively coupled to the sensor and the split heat exchange system. The controller may be configured to control the operation of the split heat exchange system based at least in part on the monitored heat exchange parameter to adjust an environmental operating condition associated with the heat generating component. 
     In another aspect, the present subject matter is directed to a method for adjusting environmental operating conditions associated with a heat generating component located within a tower of a wind turbine. The method may include monitoring, with a computing device, a heat exchange parameter associated with the wind turbine and transmitting, with the computing device, control signals to a split heat exchange system provided relative to the tower. The split heat exchange system may include a first heat exchanger located within an interior of the tower and a second heat exchanger located exterior to the tower, with the first and second heat exchangers being fluidly coupled to one another by fluid lines to allow a heat exchange fluid to be cycled between the first and second heat exchangers. In addition, the method may include controlling the operation of the split heat exchange system via the control signals based at least in part on the monitored heat exchange parameter to adjust an environmental operating condition associated with the heat generating component. 
     In a further aspect, the present subject matter is directed to a method for initiating operation of a power conversion component located within a tower of a wind turbine. The method may generally include monitoring, with a computing device, a component temperature of the power conversion component and determining, with the computing device, a dew point temperature of air contained within the tower. The method may also include controlling, with the computing device, the operation of a split heat exchange system provided relative to the tower to adjust a temperature differential between the component temperature and the dew point temperature such that the component temperature is maintained above the dew point temperature. The split heat exchange system may include a first heat exchanger located within an interior of the tower and a second heat exchanger located exterior to the tower. In addition, the method may include initiating, with the computing device, the operation of the power conversion component. 
     These and other features, aspects and advantages of the present invention will become better understood with reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A full and enabling disclosure of the present invention, including the best mode thereof, directed to one of ordinary skill in the art, is set forth in the specification, which makes reference to the appended figures, in which: 
         FIG. 1  illustrates a side view of one embodiment of a wind turbine in accordance with aspects of the present subject matter; 
         FIG. 2  illustrates a schematic view of one embodiment of a system for adjusting environmental operating conditions associated with heat generating components located within a tower of a wind turbine, particularly illustrating a split heat exchange system provided relative to the tower such that a first heat exchanger of the system is located within the tower and a second heat exchanger of the system is located exterior to the tower; 
         FIG. 3  illustrates a schematic view of one embodiment of a suitable controller that may be utilized in accordance with aspects of the present subject matter to control the operation of one or more components of the disclosed system; and 
         FIG. 4  illustrates a flow diagram of one embodiment of a method for adjusting environmental operating conditions associated with heat generating components located within a tower of a wind turbine in accordance with aspects of the present subject matter. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents. 
     In general, the present subject matter is directed to systems and methods for adjusting environmental operating conditions associated with heat generating components located within a tower of a wind turbine. Specifically, in several embodiments, a split heat exchange system may be installed relative to the tower such that a first heat exchanger of the system is located within the tower and a second heat exchanger of the system is located exterior to the tower. The heat exchangers may be fluidly coupled to one another via fluid lines to allow a suitable heat exchange fluid to be cycled between the heat exchanger. As such, the split heat exchange system may implement a thermodynamic refrigeration or heat pump cycle to draw heat out of the air contained within the tower or to release heat into the tower. For example, the split heat exchange system may be operated in a cooling or first operational mode in which the interior or first heat exchanger serves an evaporator to draw heat out of the air contained within the tower, thereby allowing the tower air to be cooled. In addition, the split heat exchange system may be operated in a heating or second operational mode in which the interior or first heat exchanger serves a condenser to release heat into the air contained within the tower, thereby allowing the tower air to be heated. 
     By controlling the operation of the split heat exchange system, the disclosed system may adjust one or more environmental operating conditions associated with the tower-based, heat generating components of the wind turbine. For instance, in one embodiment, a component temperature(s) of one or more of the heat generating components may be monitored and compared to a predetermined temperature threshold. In the event that the component temperature(s) exceeds the predetermined temperature threshold, the operation of the split heat exchange system may be controlled such that the system is operated in its cooling or first operational mode, thereby reducing the internal air temperature within the tower and providing a cooling effect to the heat generating components. 
     In another embodiment, the component temperature(s) of one or more of the heat generating components may be monitored and compared to a dew point temperature of the air contained within the tower. For example, the dew point temperature may be determined based on sensor measurements provided by one or more temperature sensors, humidity sensors and/or pressure sensors. In the event that the component temperature(s) is less than the dew point temperature (or if the component temperature(s) only exceeds the dew point temperature by a given temperature differential, such as 5 degree Celsius (° C.)), the operation of the split heat exchange system may be controlled such that the system is operated in a manner that adjusts the temperature differential between the component temperature(s) and the dew point temperature, thereby reducing the likelihood of condensation forming on the heat generating components. For example, if the ambient air temperature is relatively high, the split heat exchange system may be operated in its cooling or first operational mode to cool the internal tower air and, thus, reduce the relative humidity with the tower, thereby decreasing the dew point temperature relative to the component temperature(s). Alternatively, if the ambient air temperature is relatively low, the split heat exchange system may be operated in its heating or second operational mode to heat the internal tower air, thereby providing a means to increase the component temperature(s) relative to the dew point temperature. 
     Referring now to the drawings,  FIG. 1  illustrates a side view of one embodiment of a wind turbine  10 . As shown, the wind turbine  10  generally includes a tower  12  extending from a support surface  14  (e.g., the ground, a concrete pad or any other suitable support surface). In addition, the wind turbine  10  may also include a nacelle  16  mounted on the tower  12  and a rotor  18  coupled to the nacelle  16 . The rotor  18  includes a rotatable hub  20  and at least one rotor blade  22  coupled to and extending outwardly from the hub  20 . For example, in the illustrated embodiment, the rotor  18  includes three rotor blades  22 . However, in an alternative embodiment, the rotor  18  may include more or less than three rotor blades  22 . Each rotor blade  22  may be spaced about the hub  20  to facilitate rotating the rotor  18  to enable kinetic energy to be transferred from the wind into usable mechanical energy, and subsequently, electrical energy. For instance, the hub  20  may be rotatably coupled to an electric generator  24  positioned within the nacelle  16  to permit electrical energy to be produced. 
     In several embodiments, one or more heat generating components  26  of the wind turbine  10  may be located within the tower  12 . For instance, as shown in  FIG. 1 , suitable power conversion equipment  28  may be positioned within the interior of the tower  12 , such as at a lower level of the tower  12  proximal to the support surface  14 . In such an embodiment, tower cables  30  may be electrically coupled between the generator  24  and the power conversion equipment  28  to allow power to be transferred between the components. As is generally understood, various other heating generating components  26  may also be located within the tower  12 , such as one or more components of the wind turbine control system. 
     Referring now to  FIG. 2 , a schematic view of one embodiment of a system  100  for adjusting an environmental operating condition(s) associated with heat generating components of a wind turbine is illustrated in accordance with aspects of the present subject matter. Specifically,  FIG. 2  illustrates an interior view of a lower portion of the tower  12  of the wind turbine  10  shown in  FIG. 1 , particularly illustrating examples of power conversion equipment  28  that may be positioned within the interior of the tower  12 . However, as indicated above, any other suitable heat generating components  26  may also be located within the interior of the tower  12 . 
     In general, the power conversion equipment  28  of the wind turbine  10  may include any number of power conversion components located within the interior of the tower  12 . For example, as shown in  FIG. 2 , a power converter  102  and a main control cabinet (MCC)  104  may be located within an enclosure or cabinet  106  disposed within the interior of the tower  12 . In one embodiment, the power converter  102  may include both a rotor side converter (not shown) and a line side converter (not shown), with the rotor and line side converters being coupled via DC link (not shown). In such an embodiment, the power converter  102  may be configured for normal operating mode in a three-phase, pulse width modulation (PWM) arrangement using suitable switching elements, such as one or more IGBTs. It should be appreciated that, although not shown, the power conversion equipment  28  of the wind turbine  10  may include any other suitable power conversion components located within the tower  12 , such as switch cabinets, power distribution panels, bridge cabinets, control cabinets, converter threads and/or the like. 
     As indicated above, the disclosed system  100  may include suitable components for adjusting an environmental operating condition(s) associated with the tower-based, heat generating components  26  of the wind turbine  10 , such as a component temperature of one or more of the power conversion components of the power conversion equipment  28  and/or a dew point temperature of the air contained within the tower. Specifically, in several embodiments, the system  100  may incorporate aspects of a split heat exchange system  110  that allows the power conversion components and other heat generating components  26  located within the tower  12  to be cooled so as maintain such components within their temperature capabilities. In addition, the split heat exchange system  110  may be controlled in a manner so as to reduce the likelihood of condensation forming on the heat generating components  26 , such as prior to start-up or initiating operation of the power conversion equipment  28 . 
     As shown in  FIG. 2 , the split heat exchange system  110  may include a first heat exchanger  112 , a second heat exchanger  114  and one or more related system components (e.g., an expansion valve  116  and a compressor  118 ) to allow the split heat exchange system  110  to implement a thermodynamic refrigeration or heat pump cycle. In several embodiments, the first heat exchanger  112  may be located within the interior of the wind turbine  12 , such as at a location directly above the power conversion equipment  28 , while the second heat exchanger  114  may be located exterior to the tower  12 , such as by being mounted to the exterior of the tower  12  or by being positioned on the support surface  14  for the wind turbine  10  or on a frame (not shown) disposed on the support surface  14 . Additionally, as shown in  FIG. 2 , the heat exchangers  112 ,  114  may be coupled in a fluid circulation loop (e.g., via fluid lines  120 ) to allow a suitable heat exchange fluid (e.g., a refrigerant) to be circulated between the heat exchangers  110 ,  112  from the interior of the tower  12  to the exterior of the tower  12 . 
     It should be appreciated that the various components of the split heat exchange system  110  may have any suitable configuration. For example, in one embodiment, the compressor  118  may correspond to a variable speed compressor. In such an embodiment, the operating speed of the compressor  118  may be adjusted, as necessary or desired, based on the requirements of the system  110 . Such control may allow for the split heat exchange system  110  to be operated more efficiently, such as by reducing the energy draw of the system  110  and by facilitating enhanced control of the thermal gradient across the heat generating components  26 . 
     In several embodiments, the split heat exchange system  110  may be configured similar to a reversible heat pump, thereby allowing the split heat exchange system  110  to be operated in both a cooling or first operational mode and a heating or second operational mode. When operating in the first operational mode, the first heat exchanger  112  may serve as an interior evaporator whereas the second heat exchanger  114  may serve as an exterior condenser, with the heat exchange fluid being cycled between the heat exchangers  112 ,  114  in a first cycle direction (indicated by arrows  122  in  FIG. 2 ). In such operating mode, the heat exchange fluid may be directed into the first heat exchanger  112  (e.g., serving as the evaporator) as a cold, low pressure liquid, within which the heat exchange fluid is gasified or vaporized. As a result, the first heat exchanger  112  may serve as a source of cold air for the split heat exchange system  110 . For example, as shown in  FIG. 2 , an interior blower or fan  124  may be positioned adjacent to the first heat exchanger  112  (e.g., directly above the heat exchanger  112 ) to direct or draw an airflow (indicated by arrows  126 ) across the coils (not shown) of the first heat exchanger  112  such that heat contained within the air  126  is absorbed by the heat exchange fluid, thereby cooling the internal tower air  126 . The low pressure, gaseous heat exchange fluid exiting the first heat exchanger  112  may then be directed into the compressor  118  (e.g., located exterior of the tower  12 ), which is generally configured to increase the pressure of the heat exchange fluid. The high pressure, gaseous heat exchange fluid may then flow into the second heat exchanger  114  (e.g., serving as the condenser), within which the heat exchange fluid is liquefied. For example, as shown in  FIG. 2 , an external blower or fan  128  may be configured to direct an airflow (indicated by arrow  130  in  FIG. 2 ) from the exterior of the tower  12  across the coils (not shown) of the second heat exchanger  114  that absorbs heat from the heat exchange fluid, thereby liquefying the heat exchange fluid within the second heat exchanger  114 . The liquefied, high pressure heat exchange fluid may then be directed into the expansion valve  116  (e.g., located within the tower  12 ) to reduce both the pressure and the temperature of the heat exchange fluid. The cold, low pressure heat exchange fluid is then cycled back to the first heat exchanger  112  and the process is repeated. 
     Similarly, when operating in the second operational mode, the cycle may be reversed, with the first heat exchanger  112  serving as an interior condenser and the second heat exchanger  114  serving as an exterior evaporator and the heat exchange fluid being cycled between the heat exchangers  112 ,  114 , in a second cycle direction (indicated by arrows  132  in  FIG. 2 ). As such, the first heat exchanger  112  may be configured to release heat into the interior of the tower  12  as the heat exchange fluid is liquefied within the first heat exchanger  112 . The cold, liquefied heat exchange fluid may then be subsequently gasified or vaporized within the second heat exchanger  114  as heat is withdrawn from the air located outside the tower  12 . 
     By providing the split heat exchange system  110 , the temperature of the air contained within the tower  12  may be adjusted, as desired, thereby providing a means for regulating the component temperatures of the heat generating components  26  located within the tower  12 . For example, when the split heat exchange system  110  is operated in its first operational mode, the air  126  within the tower  12  may be drawn across the coils of the first heat exchanger  112  to reduce its air temperature. This cooled tower air  126  may then be circulated back across the heat generating components  26  to reduce their corresponding component temperatures. In addition, such cooling of the tower air  126  may serve to reduce the relative humidity within the tower  12 , thereby lowering the dew point temperature of the tower air  126 . Similarly, when operating in the second operational mode, the air  126  within the tower  12  may be drawn across the coils of the first heat exchanger  112  to increase its air temperature. This heated tower air  126  may then be circulated back across the heat generating components  26  to increase their corresponding component temperatures, which may be desirable in certain instances in which there is a risk of condensation forming on the heat generating components  26 . 
     It should be appreciated that, in several embodiments, the heat generating components  26  of the wind turbine  10  may include one or more separate cooling circuits configured to provide an additional means for cooling such components. For instance, an internal cooling circuit (indicated by dashed line  134 ) may be provided between one or more components of the power conversion equipment  28 , such as between the converter  102  and the MCC  104  for circulating air or any other fluid across such components. As shown in  FIG. 2 , the internal cooling circuit  134  may include a fan  136  and an air-to-air heat exchanger  138  positioned between the converter  102  and the MCC  104 , with the fan  136  being configured to draw an airflow through the converter  102  and across the air-to-air heat exchanger  138  prior to such airflow being directed through the MCC  104 . In such an embodiment, the tower air  126  drawn through the cabinet(s)  106  housing the power conversion components  102 ,  104  may be directed through the air-to-air heat exchanger  138  to provide a means for cooling the air being circulated through the internal cooling circuit  134 . 
     As shown in  FIG. 2 , the system  100  may also include a controller  150  configured to automatically control the operation of the split heat exchange system  110 , including the operation of one or more of the individual components of the system  110 . For example, the controller  150  may be configured to turn the split heat exchange system  110  on and off. In addition, the controller  150  may be configured to select or adjust the current operational mode for the split heat exchange system  110 , such as by selecting that the split heat exchange system  110  be operated in its first operational mode or its second operational mode. 
     In general, the controller  150  may correspond to any suitable processor-based device, such as any suitable computing device. Thus, in several embodiments, the controller  150  may include computer-readable instructions that, when executed by one or more processors, cause the processor(s) to implement various control routines or algorithms. For instance, as will be described below, the computer-readable instructions may allow the controller  150  to control the operation of the split heat exchange system  110  based on one or more monitored heat exchange parameters, such as a temperature measurement and/or a humidity measurement provided by one or more sensors. 
     In several embodiments, the controller may be coupled to one or more temperature sensors  152 ,  154 ,  156  configured to monitor a temperature associated with the wind turbine  10 . For example, in one embodiment, the controller may be coupled to one or more first air temperature sensors  152  configured to monitor a dry bulb temperature of the air located relative tower  12 . Specifically, as shown in  FIG. 2 , one or more first air temperature sensors  152  may be positioned on or exterior to the tower  12  to monitor the dry bulb temperature of the air located exterior to the tower  12  and/or one or more first air temperature sensors  152  may be positioned on or within the tower  12  to monitor the dry bulb temperature of the internal tower air  126 . Additionally, in one embodiment, the controller  150  may be coupled to one or more second air temperature sensors  154  configured to monitor a wet bulb temperature of the air  126  located within the tower  12 . For example, as shown in  FIG. 2 , one or more second air temperature sensors  154  may be located proximal to and/or within the first heat exchanger  112  to allow the sensor(s)  154  to monitor the wet bulb temperature of the air  126  passing across the coils of the first heat exchanger  112  using the condensation from the coils of the first heat exchanger  112  as a water source. Moreover, the controller  150  may also be coupled to one or more component temperature sensors  156  configured to monitor the component temperature(s) of one or more of the heat generating components  26  of the wind turbine  10 . For example, as shown in  FIG. 2 , one or more component temperature sensors  156  may be located on or within the power converter  102  to monitor the component temperature(s) of any number of components of the power converter  102 . Similarly, one or more component temperature sensors  156  may also be located on or within the MCC  104  to monitor the component temperature(s) of any components located therein. 
     Further, the controller  150  may also be coupled to any other suitable sensors for monitoring one or more other operating conditions of the wind turbine  10  and/or its components. For example, in one embodiment, the controller  150  may be coupled to a humidity sensor  158  configured to monitor the relative humidity of the air  126  within the tower  12 . Additionally, in one embodiment, the controller  150  may be coupled to an atmospheric pressure sensor  160  configured to monitor the atmospheric air pressure. As is generally understood, the dew point temperature of air may vary based on the atmospheric air pressure. As such, the pressure sensor  160  may be used to increase the accuracy of any dew point temperature calculations made by the controller  150  based on variations in the altitude of differing wind turbine sites. 
     As indicated above, the controller  150  may, in several embodiments, be configured to control the operation of the split heat exchange system  110  based on the sensor measurements provided by one or more of the sensors  152 ,  154 ,  156 ,  158 ,  160 . For example, in one embodiment, the controller  150  may be configured to control the operation of the split heat exchange system  110  so as to prevent overheating of the heat generating components  26 . Specifically, the controller  150  may be configured to monitor a temperature associated with the heat generating components  26  (e.g., the air temperature within the tower  12  and/or the component temperature(s) of one or more of the heat generating components  26 ). In such an embodiment, if the monitored temperature exceeds a predetermined temperature threshold (e.g., a temperature threshold selected based on the known temperature ratings of the heat generating components), the controller  150  may activate the split heat exchange system  110  such that the system  110  is operated in its first operational mode, thereby reducing the air temperature within the tower  12  and providing a cooling effect for the heat generating components  26 . 
     As indicated above, in addition to controlling the operation of the split heat exchange system  10  so as to prevent overheating of the heat generating components  26 , the controller  150  may also be configured to control the operation of the split heat exchange system  110  to prevent condensation from forming on the heat generating components  26  (e.g., when the power conversion equipment  28  has been shut down). Specifically, in several embodiments, the controller  150  may be configured to determine the dew point temperature of the air  126  contained within the tower  12  based on the sensor measurements provided by one or more of the sensors  152 ,  154 ,  156 ,  158 ,  160 . For instance, the controller  150  may determine the dew point temperature based on the wet and dry bulb temperature measurements provided by the first and second air temperature sensors  152 ,  154 . Alternatively, the controller  150  may determine the dew point temperature based on the relative humidity measurements provided by the humidity sensor(s)  158  along with the temperature measurements provided by one or both of the air temperature sensors  152 ,  154 . Additionally, as indicated above, the controller  150  may also take into account the atmospheric air pressure measurements provided by the pressure sensor  160  when determining the dew point temperature of the tower air  126 . 
     Upon calculating the dew point temperature, the controller  150  may be configured to compare the dew point temperature to the component temperature(s) monitored via the component temperature sensor(s)  156 . In the event that the component temperature(s) is below the dew point temperature (or is only above the dew point temperature by a predetermined temperature differential), the controller  150  may be configured to control the operation of the split heat exchange system  110  in a manner that adjusts the temperature differential between the dew point temperature and the component temperature(s) to ensure that condensation does not form on the heat generating components  26 . It should be appreciated that the predetermined temperature differential may generally correspond to any suitable temperature value. However, in one embodiment, the predetermined temperature differential may correspond to a temperature value of less than 5 degrees Celsius (° C.), such as a temperature value of less than 2° C. or less than 1° C. and/or any other subranges therebetween. 
     In several embodiments, the manner in which the controller  150  is configured to control the operation of the split heat exchange system  110  to prevent the formation of condensation on the heat generating components  26  may vary depending on the ambient air temperature within and/or exterior to the tower  12 . For instance, if the ambient air temperature is relatively low, the controller  150  may control the operation of the split heat exchange system  110  such that the system  110  is operated in its second operational mode, thereby increasing the ambient air temperature within the tower  12  and providing a heating effect for the heat generating components  26 . Such internal heating may increase the component temperature(s) of the heat generating components  26  relative to the dew point temperature, thereby inhibiting the formation of condensation on such components  26 . For instance, the split heat exchange system  110  may be operated in its second operational mode until the component temperature(s) initially exceeds the dew point temperature or until the component temperature(s) exceeds the dew point temperature by the predetermined temperature differential. 
     Alternatively, if the ambient air temperature is relatively high, the controller  150  may control the operation of the split heat exchange system  110  such that the system  110  is operated in its first operational mode, thereby reducing the ambient air temperature within the tower  12  and providing a cooling effect for the heat generating components  26 . Such internal cooling may also serve to reduce the relative humidity within the tower  12  and, thus, may decrease the dew point temperature relative to the component temperature(s) of the heat generating components  26 , thereby inhibiting the formation of condensation on such component  26 . For instance, the split heat exchange system  110  may be operated in its first operational mode until the dew point temperature initially drops below the component temperature(s) or until the dew point temperature falls below the component temperature(s) by the predetermined temperature differential. 
     Referring now to  FIG. 3 , a block diagram of one embodiment of suitable components that may be included within the controller  150  of the disclosed system  100  is illustrated in accordance with aspects of the present subject matter. As shown, the controller  150  may include one or more processor(s)  170  and associated memory device(s)  172  configured to perform a variety of computer-implemented functions (e.g., performing the methods, steps, calculations and the like disclosed herein). 
     As used herein, the term “processor” refers not only to integrated circuits referred to in the art as being included in a computer, but also refers to a controller, a microcontroller, a microcomputer, a programmable logic controller (PLC), an application specific integrated circuit, and other programmable circuits. Additionally, the memory device(s)  172  may generally comprise memory element(s) including, but not limited to, computer readable medium (e.g., random access memory (RAM)), computer readable non-volatile medium (e.g., a flash memory), a floppy disk, a compact disc-read only memory (CD-ROM), a magneto-optical disk (MOD), a digital versatile disc (DVD) and/or other suitable memory elements. 
     Such memory device(s)  172  may generally be configured to store suitable computer-readable instructions that, when implemented by the processor(s)  170 , configure the controller  150  to perform various functions including, but not limited to, receiving measurement signals from one or more sensors  152 ,  154 ,  156 ,  158 ,  160  and/or controlling the operation of the split heat exchange system  110 . For example, the controller  150  may be configured to transmit suitable control signals (indicated by arrow  174  in  FIG. 3 ) for controlling the operation of the split heat exchange system  110 . 
     Additionally, the controller  150  may also include a communications interface  176  to facilitate communications between the controller  150  and the various components of the wind turbine  10 , including the split heat exchange system  110 . An interface can include one or more circuits, terminals, pins, contacts, conductors, or other components for sending and receiving control signals. Moreover, the controller  150  may also include a sensor interface  178  (e.g., one or more analog-to-digital converters) to permit signals transmitted from the sensors (e.g. sensors  152 ,  154 ,  156 ,  158 ,  160 ) to be converted into signals that may be understood and processed by the processor(s)  170 . 
     Referring now to  FIG. 4 , a flow diagram of one embodiment of a method  200  for adjusting an environmental operating condition(s) associated with heat generating components of a wind turbine is illustrated in accordance with aspects of the present subject matter. In general, the method  200  will be described herein with reference to the system  100  described above with reference to  FIG. 2 . However, it should be appreciated that aspects of the disclosed method  200  may be utilized with any other suitable system for adjusting environmental operating conditions associated with heat generating components of a wind turbine. In addition, although  FIG. 4  depicts steps performed in a particular order for purposes of illustration and discussion, the methods discussed herein are not limited to any particular order or arrangement. One skilled in the art, using the disclosures provided herein, will appreciate that various steps of the methods disclosed herein can be omitted, rearranged, combined, and/or adapted in various ways without deviating from the scope of the present disclosure. 
     As shown in  FIG. 4 , at ( 202 ), the method  200  includes monitoring a heat exchange parameter associated with the wind turbine. For example, as indicated above, the controller  150  may be configured to monitor one or more heat exchange parameters, such as a temperature value and/or a humidity value associated with the wind turbine. Specifically, the controller  150  may be coupled to one or more temperature sensors  152 ,  154 ,  156  configured to detect one or more temperatures associated with the wind turbine, such as the dry bulb temperature of the air within or exterior to the tower  12 , the wet bulb temperature of the air within the tower  12  and/or the component temperature(s) of one or more of heat generating components  26 . Similarly, the controller  150  may be coupled to one or more humidity sensors  158  configured to monitor the relative humidity of the air  126  within the tower  12 . As such, by receiving measurement signals from the sensors  152 ,  154 ,  156 ,  158 , the controller  150  may be configured to monitor one or more heat exchange parameters associated with the wind turbine. 
     Additionally, at ( 204 ), the method  200  may include transmitting control signals to a split heat exchange system provided relative to the tower. For example, as indicated above, the split heat exchange system  110  may include a first heat exchanger  112  located within the interior of the tower  12  and a second heat exchanger  114  located exterior to the tower  112 , with the first and second heat exchangers  112 ,  114  being fluidly coupled to one another via fluid lines  120  to allow a heat exchange fluid to be cycled between the heat exchangers  112 ,  114 . As described above with reference to  FIGS. 2 and 3 , the controller  150  may be communicatively coupled to the split heat exchange system  110  to allow control signals  174  ( FIG. 3 ) to be transmitted from the controller  150  to the split heat exchange system  110  to control its operation. 
     Moreover, at ( 206 ), the method  200  may include controlling the operation of the split heat exchange system via the control signals based at least in part on the monitored heat exchange parameter to adjust an environmental operating condition associated with the heat generating component. For example, as indicated above, the controller  150  may, in one embodiment, control the operation of the split heat exchange system  110  so as to prevent overheating of the tower-based, heat generating components  26  of the wind turbine  10 . In such an embodiment, the controller  150  may be configured to compare a monitored temperature associated with the wind turbine (e.g., the air temperature within the tower  12  and/or the component temperature(s) of the heat generating component(s)) to a predetermined temperature threshold. In the event that the monitored temperature exceeds the predetermined temperature threshold, the controller  150  may transmit suitable control signals  174  to the split heat exchange system  110  such that the system  110  is operated in its first operational mode, thereby reducing the internal air temperature within the tower  12  and providing a cooling effect for the heat generating components  26 . 
     In another embodiment, the controller  150  may control the operation of the split heat exchange system  110  so as to prevent the formation of condensation on the heat generating components  26  of the wind turbine  10 . For example, as indicated above, the controller  150  may be configured to determine the dew point temperature of the air within the tower based at least in part on one or more monitored heat exchange parameters (e.g., based on the dry bulb temperature and/or the wet bulb temperature of the air and/or based on the relative humidity of the air). In such an embodiment, the controller  150  may be configured to compare the component temperature(s) of the heat generating component(s) to the dew point temperature. In the event that the component temperature(s) is less than the dew point temperature (or only exceeds the dew point temperature by a predetermined temperature differential), the controller  150  may transmit suitable control signals  174  to the split heat exchange system  110  for controlling its operation in a manner that reduces the likelihood of condensation forming on the heat generating component(s)  26 . For instance, as indicated above, if the ambient air temperature is relatively low, the controller  150  may control the operation of the split heat exchange system  110  such that the system  110  is operated in its second operational mode, thereby increasing the ambient air temperature within the tower  12  and, thus, increasing the component temperature(s) of the heat generating components  26  relative to the dew point temperature. Alternatively, if the ambient air temperature is relatively high, the controller  150  may control the operation of the split heat exchange system  110  such that the system  110  is operated in its first operational mode, thereby reducing the relative humidity within the tower  12  and, thus, decreasing the dew point temperature relative to the component temperature(s) of the heat generating components  26 . 
     This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.