CN113090478A - Wind generating set, environment control system and environment control method - Google Patents
Wind generating set, environment control system and environment control method Download PDFInfo
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- CN113090478A CN113090478A CN201911338430.3A CN201911338430A CN113090478A CN 113090478 A CN113090478 A CN 113090478A CN 201911338430 A CN201911338430 A CN 201911338430A CN 113090478 A CN113090478 A CN 113090478A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 78
- 238000005057 refrigeration Methods 0.000 claims abstract description 45
- 238000001816 cooling Methods 0.000 claims abstract description 41
- 230000007613 environmental effect Effects 0.000 claims description 36
- 230000017525 heat dissipation Effects 0.000 claims description 22
- 239000003507 refrigerant Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 9
- 230000005494 condensation Effects 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 4
- 238000007791 dehumidification Methods 0.000 abstract description 15
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000005457 optimization Methods 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 48
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
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- 150000003839 salts Chemical class 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/60—Cooling or heating of wind motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses a wind generating set, an environment control system and an environment control method, wherein the system comprises a condensing device positioned outside a cabin, an air-liquid heat exchanger positioned inside the cabin, a refrigeration cycle device and an induced draft fan; the environment control system comprises two sets of heat exchange devices including an air-liquid heat exchanger and a refrigeration cycle device, one or two sets of the two sets of heat exchange devices can be reasonably selected to cool and dehumidify the gas in the engine room according to the environment of the engine room and the working conditions of all components such as the main bearing and the like, so that single-stage cooling and dehumidification can be realized, two-stage cooling and dehumidification can also be realized, the use flexibility is greatly improved due to the two cold sources, the main heat exchange components in the environment control system are located in the engine room, the refrigerating capacity is higher, all or most of the heating components of the wind generating set located in the tower top can be intensively installed in the engine room, and the optimization of the internal structural.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a wind generating set, an environment control system and an environment control method.
Background
Wind generating sets are devices for converting wind energy into electric energy, and the role of the wind generating sets in economic life is more and more important.
The wind turbine generator system generally includes a tower, and an equipment assembly located at the top of the tower, where the equipment assembly includes a nacelle and a hub, the hub is rotatably mounted on a base of the nacelle through a main bearing, the hub is provided with blades, and an installation cavity is formed inside the nacelle. For a high-power offshore wind generating set, after considering the design that power components such as a converter and a box transformer which are traditionally arranged at the bottom of a tower barrel are arranged in a cabin, a plurality of heating components such as a generator, a gear box and a converter controller are arranged in an installation cavity of the cabin. Wherein, wind generating set during operation, each spare part all can produce the heat, and generator, gear box (to the setting of double-fed unit), converter controller, base bearing especially can produce a large amount of heats at the during operation, and these heats need in time release to external environment, otherwise the heat condenses can lead to each spare part high temperature, influences the normal work of spare part, reduces wind generating set's work efficiency.
How to make the cooling effect of the tower top equipment of the wind driven generator better and further make the work of the wind driven generator set maintain a high-efficiency state is a goal pursued by the technicians in the field.
Disclosure of Invention
The invention provides an environment control system of a wind generating set, which comprises a condensing device positioned outside a cabin, an air-liquid heat exchanger positioned inside the cabin and a refrigeration circulating device forming a refrigerant loop, wherein the refrigeration circulating device at least comprises a compressor, a condenser and an evaporator which are sequentially connected; the condensing device can form a first cooling loop with the air-to-liquid heat exchanger to cool a heat exchange medium in the air-to-liquid heat exchanger, and the condensing device can form a second cooling loop with the condenser to cool a refrigerant flowing through the condenser;
the air-liquid heat exchanger also comprises an induced draft fan which is used for providing power for the air flow in the engine room to circulate through the air-liquid heat exchanger and the evaporator.
The environment control system comprises two sets of heat exchange devices including an air-liquid heat exchanger and a refrigeration cycle device, one or two sets of heat exchange devices can be reasonably selected to cool and dehumidify the engine room gas according to the working conditions of the engine room environment, the main bearing and other parts, so that single-stage cooling and dehumidification can be realized, two-stage cooling and dehumidification can be realized, the use flexibility is greatly improved due to the two cold sources, the main heat exchange components in the environment control system are positioned in the engine room, the refrigeration capacity is higher, all or most of the heating components positioned on the top of the tower of the wind generating set can be intensively installed in the engine room, namely, the environment control system with high refrigeration capacity provided by the environment control system is used for intensively cooling all the heating components, and optimization of the internal structural arrangement of the engine room is facilitated.
That is to say, according to different working conditions of the wind generating set, the environmental control system provided by the invention can be provided with a first cooling mode, a second cooling mode and a dehumidification mode, wherein the first cooling mode can be only an air-liquid heat exchanger or a refrigeration cycle device to work, the working condition is suitable for the situation that the environmental temperature in the engine room is not too high, and the normal work of the wind driven generator can be maintained by modifying to provide less cold energy; the second cooling mode is the first cooling mode, only the air-liquid heat exchanger and the refrigeration cycle device work simultaneously, and the mode is suitable for the working condition that the cabin temperature is higher and large cooling capacity needs to be provided; the dehumidification mode is suitable for the situation that the environment humidity in the cabin is relatively high, and dehumidification is carried out while refrigeration is needed, at the moment, the air-liquid heat exchanger is maintained to carry out primary cooling on the gas, and then the refrigeration cycle device is started to dehumidify the cooled gas, so that part of water in the gas is analyzed.
Optionally, the air-liquid heat exchanger and the refrigeration cycle device are integrated inside the box body.
Optionally, the air-liquid heat exchanger and the evaporator are sequentially arranged along the airflow direction, so that the airflow sequentially passes through the air-liquid heat exchanger and the evaporator to exchange heat.
Optionally, the wind power generation system further comprises a first pipeline and a main bearing heat dissipation assembly, wherein the first pipeline is used for communicating an air outlet of the box body with a hub space of the wind power generation unit; the main bearing heat dissipation assembly is used for forming a heat dissipation channel of the main bearing; the first duct, the hub space, the heat dissipation channel, the cabin interior, and the box body form an air circulation flow channel.
Optionally, the main bearing heat dissipation assembly comprises a plurality of heat dissipation fins, each of the heat dissipation fins is arranged along the circumferential direction of the main bearing, and the outer edge of each of the heat dissipation fins is installed in contact with the main bearing.
Optionally, the air-cooling box further comprises a sealing element, the outer edge of the sealing element is connected with the inner edge of the cooling fin, a ventilation opening is formed in the sealing element, and the first pipeline is connected between the air outlet of the box body and the ventilation opening.
Optionally, the air-liquid heat exchanger comprises a plate-fin heat exchanger; or/and the condensing device is an air-liquid condensing device and is positioned on the outer side of the top wall of the cabin.
Optionally, the induced draft fan is integrated inside the box body and is close to the air outlet.
Optionally, the main bearing further comprises a temperature sensor, wherein the temperature sensor is used for detecting the working temperature of the main bearing; when the working temperature of the main bearing is higher than a preset value, starting the air-liquid heat exchanger and the refrigeration cycle device to cool air simultaneously; and when the working temperature of the main bearing is lower than or equal to a preset value, only starting the air-liquid heat exchanger to cool the air.
Optionally, the system further comprises a humidity sensor for detecting the humidity of the environment inside the nacelle or inside the hub; and when the working temperature of the main bearing is not higher than the preset value and the ambient humidity is higher than a preset value, simultaneously starting the air-liquid heat exchanger and the refrigeration cycle device, and controlling the temperature of the air flow passing through the evaporator to be lower than the dew point.
In addition, the invention also provides a wind generating set, which comprises a tower barrel, a cabin positioned at the top of the tower barrel and an environment control system of the wind generating set, wherein the air-liquid heat exchanger and the refrigeration cycle device are positioned in the cabin, and the condensing device is positioned outside the cabin.
Optionally, the heat generating components in the nacelle include a converter and a box transformer.
Furthermore, the invention also provides an environment control method of the wind generating set, the environment control system comprises a condensing device positioned outside the engine room, an air-liquid heat exchanger positioned inside the engine room and a refrigeration circulating device forming a refrigerant loop, and the refrigeration circulating device at least comprises a compressor, a condenser and an evaporator which are connected in sequence; the environmental control method comprises the following specific steps:
detecting the working temperature of a main bearing of the hub;
when the working temperature of the main bearing is higher than a preset value, starting the air-liquid heat exchanger and the refrigeration cycle device to cool air simultaneously; and when the working temperature of the main bearing is lower than or equal to a preset value, only starting the air-liquid heat exchanger to cool the air.
Optionally, the environmental humidity of the cabin interior space or the hub interior space is further detected;
and when the working temperature of the main bearing is not higher than the preset value and the ambient humidity is higher than a preset value, simultaneously starting the air-liquid heat exchanger and the refrigeration cycle device, and controlling the temperature of the air flow passing through the evaporator to be lower than the dew point so as to dehumidify the wind generating set.
The wind generating set provided by the invention comprises the environment control system and the environment control method, which are implemented by depending on the environment control system, so that the environment control system and the environment control method also have the technical effect of the environment control system.
Drawings
FIG. 1 is a schematic structural diagram of an environmental control system applied to a wind turbine generator system according to an embodiment of the present invention;
FIG. 2 is a flowchart of an environmental control method of a wind turbine generator system according to an embodiment of the present invention.
Wherein, the corresponding relation between the reference numbers and the part names in fig. 1 is:
1, a hub inner space; 2, radiating fins; 3 a cabin interior space; 4 a condensing unit; 5 a first conduit; 7 a seal member; 8, a main bearing; 9, a box body;
6-1 induced draft fan; 6-2 condenser; 6-3 evaporator; 6-4 second cooling circuit; 6-5 air-liquid heat exchanger; 6-6 three-way valve.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an environmental control system applied to a wind turbine generator system according to an embodiment of the present invention.
The wind generating set provided by the invention comprises a tower, a cabin and an impeller. The bottom of the tower barrel is supported on a ground foundation, the top of the tower barrel is provided with a cabin, and the cabin can rotate relative to the tower barrel to realize yawing. For a direct-drive unit, the generator is generally arranged outside the engine room and between the impeller and the engine room, as shown in fig. 1, the impeller, the generator and the engine room are arranged in sequence from left to right; particularly for a high-power offshore unit, an impeller, a generator and a cabin on the top of the tower form an organic environment-controlled whole, and the organic whole needs to be subjected to related environment-controlled operations such as cooling, dehumidification and desalination, so that the normal and stable operation of the unit is effectively guaranteed.
In addition, the invention provides an improved environment control system of a wind generating set, the improved wind generating set can be a high-power or ultra-high-power set, particularly an offshore set, in the set, because the tower bottom is seawater instead of land, power components such as a current transformer and a box transformer which are traditionally placed at the bottom of a tower are placed in an engine room, and the placement of important components at the bottom of the tower is cancelled, so that the improved environment control system is favorable for the offshore wind generating set, and the current transformer, the box transformer and the like can be prevented from being influenced by the erosion of the seawater. However, power components such as the converter and the box transformer are large heat-generating components and are intensively arranged in the engine room, and higher requirements are provided for cooling the engine room, so that the environment control system provided by the invention based on the background is a system circulating in the internal space of the engine room, the hub and the generator, air which is moist and contains salt mist and dust particles in the external environment is not introduced, and a double-cold-source coupled heat dissipation system is used, so that the heat dissipation requirement of the engine room with large heat generation is met, and the applicability of the fan is higher. Of course, the environmental control system can also be applied to a general machine set arranged in the engine room.
Specifically, the invention provides an environment control system which is mainly used for dehumidifying the environment of the inner space 4 of the engine room and the environment of the inner space 1 of the hub and cooling parts in the engine room, a main bearing 8 and the like. The environment control system comprises a condensing device 4, an air-liquid heat exchanger 6-5 and a refrigeration cycle device, wherein the condensing device 4 is installed outside the cabin, and for a wind generating set installed on land, the condensing device 4 can be installed on the outer wall of the cabin and cools heat exchange media such as water and the like inside the condensing device 4 through outside environment air. For an offshore wind turbine generator system, the condensing unit 4 may be installed in the sea, or may be installed on the outer wall of the nacelle to exchange heat with ambient air.
It should be noted that, the air-liquid heat exchanger 6-5 described herein refers to a heat exchanger in which two heat exchange media are air and liquid, respectively. The air-liquid heat exchanger 6-5 can form a first cooling loop with the condensing device 4 to cool the air flow passing through the air-liquid heat exchanger 6-5, that is, the liquid in the first cooling loop is cooled in the condensing device 4, enters the air-liquid heat exchanger 6-5, exchanges heat with the air flow passing through the surface of the air-liquid heat exchanger 6-5 in the process of flowing through the air-liquid heat exchanger 6-5, the air flow is cooled, the liquid in the air-liquid heat exchanger is heated, and the heated liquid flows into the condensing device 4 again to exchange heat with the external environment for cooling.
The refrigeration cycle device at least comprises a compressor, a condenser 6-2 and an evaporator 6-3 which are sequentially connected through pipelines. The refrigerant can flow in a refrigeration loop formed by the compressor, the condenser 6-2 and the evaporator 6-3, when the refrigeration system works, the refrigerant is compressed in the compressor to be heated, then flows into the condenser 6-2 from an outlet of the compressor, and exchanges heat with cold water (flowing into the condenser 6-2 from the condensing device 4) in the condenser 6-2 to be cooled, the cooled refrigerant flows out of the condenser 6-2 and enters the evaporator 6-3, and exchanges heat with air flow flowing over the surface of the evaporator 6-3 in the process of flowing through the evaporator 6-3, so that the air flow is cooled, the refrigerant is heated, and the heated refrigerant flows into the compressor again.
The above-mentioned condensation device 4 can also form with the condenser 6-2 a second cooling circuit 6-4, which second cooling circuit 6-4 is intended to cool the refrigerant in the condenser 6-2. The condensing device 4 can be one, and the air-liquid heat exchanger 6-5 and the condenser 6-2 form a loop together with the same condensing device 4, and as shown in fig. 1, the condensing device 4 is communicated with the air-liquid heat exchanger 6-5 and the condenser 6-2 through a three-way valve 6-6. Of course, the condensing units 4 may be provided in two or more, and one or more condensing units 4 are respectively in a loop with the air-liquid heat exchanger 6-5 and the condenser 6-2.
In order to enable the air flow in the engine room to effectively and quickly pass through the air-liquid heat exchanger 6-5 and the evaporator 6-3, the environment control system also comprises an induced draft fan 6-1, wherein the induced draft fan 6-1 can provide power for the air flow in the engine room to circularly pass through the air-liquid heat exchanger 6-5 and the evaporator 6-3, and the uniform heat exchange of the air in the engine room is favorably realized.
From the above description, it can be seen that the environmental control system of the present invention includes two sets of heat exchangers 6-5 of air-liquid heat exchangers and refrigeration cycle devices, one or two of the two sets of heat exchangers can be reasonably selected to cool and dehumidify the engine room gas according to the engine room environment and the working conditions of each component of the main bearing 8, so as to achieve single-stage cooling and dehumidification, and two cold sources have greatly improved flexibility of use, and the main heat exchange components in the environmental control system are located in the engine room inner space 4, so that the large heating components including the converter and the box transformer, which are located at the tower top of the wind turbine generator set, can be centrally installed in the engine room inner space 4, i.e. the environmental control system with high refrigeration capacity provided herein can centrally cool the large heating components including the converter and the box transformer in the engine room, the stable operation of the large-megawatt offshore wind generating set is facilitated.
That is to say, according to different working conditions of the wind generating set, the environmental control system provided by the invention can be provided with a first cooling mode, a second cooling mode and a dehumidification mode, wherein the first cooling mode can be only the air-liquid heat exchanger 6-5 or a refrigeration cycle device to work, the working condition is suitable for the situation that the ambient temperature in the engine room is not too high, and the normal work of the wind generating set can be maintained only by providing less cold energy; the second cooling mode is that the air-liquid heat exchanger 6-5 and the refrigeration cycle device work simultaneously on the basis of the first cooling mode, and the second cooling mode is suitable for the working condition that the cabin temperature is higher and large cooling capacity needs to be provided; the dehumidification mode is suitable for the situation that the environment humidity in the cabin is relatively high, and dehumidification is needed while refrigeration is carried out, at the moment, the air-liquid heat exchanger 6-5 is maintained to carry out primary cooling on gas, then the refrigeration cycle device is started to carry out secondary cooling on the gas, so that the temperature of the gas is reduced to be below a dew point, and water vapor in the air can be separated out in a liquid state, and the dehumidification function is realized.
In a specific embodiment, the environmental control system of the invention further comprises a box body 9, the box body 9 is provided with an air outlet and an air inlet, and the air-liquid heat exchanger 6-5 and the refrigeration cycle device are integrated in the box body 9, so that all main components of the environmental control system can be prefabricated in the box body 9 and then are installed in a cabin, thereby being beneficial to modularized assembly and operation and improving the assembly efficiency and quality stability. When the air-cooled air conditioner works, air in a cabin enters the box body 9 from the air inlet of the box body 9, and the position of the air inlet can be located at a proper position of the box body 9, specifically can be located at an upstream position of air flow of the induced draft fan 6-1, and is not limited. After entering the box body 9, the airflow is subjected to heat exchange, temperature reduction or/and dehumidification with the air-liquid heat exchanger 6-5 and the refrigeration cycle device which are positioned inside the box body 9, so that the box body 9 can also perform the function of concentrating the airflow.
In a preferred embodiment, the air-liquid heat exchanger 6-5 and the evaporator 6-3 are arranged in series in the direction of the air flow, so that the air flow is heat exchanged in series through the air-liquid heat exchanger 6-5 and the evaporator 6-3.
In the embodiment, the airflow is cooled by the air-liquid heat exchanger 6-5 and then cooled and dehumidified by the evaporator 6-3, which is beneficial to improving the overall cooling and dehumidifying efficiency of the system.
In each of the above embodiments, the environmental control system may further include a first pipeline 5 and a main bearing heat dissipation assembly, where the first pipeline 5 is used to communicate an air outlet of the box 9 with a hub space of the wind turbine generator set; the main bearing heat dissipation assembly is used for forming a heat dissipation channel of the main bearing; the first duct 5, the hub space, the heat dissipation channel, the cabin interior space 4, and the box 9 form an air circulation flow channel.
That is to say, cabin inner space 4 and wheel hub inner space 1 both communicate and form circulation circuit through the heat dissipation passageway of box 9 inner space, first pipeline 5 and main bearing, like this under the power effect of draught fan 6-1, gas can the circulation flow in cabin and wheel hub space inside, can cool down the cooling to the main bearing simultaneously.
It should be noted that the main bearing referred to herein is a bearing in which the hub is rotatably mounted to the nacelle. I.e. the hub is rotatably mounted to the nacelle via a main bearing.
In the embodiment, the environmental control system provided by the invention can cool and dehumidify the engine room and the internal parts thereof, the internal space 1 of the hub and the main bearing at the same time, further simplifies the system structure, improves the system utilization rate and is beneficial to optimizing the structure of the wind generating set.
Specifically, the main bearing heat dissipation assembly may include a plurality of heat dissipation fins 2, each heat dissipation fin 2 is arranged along the circumferential direction of the main bearing, and the outer edge of each heat dissipation fin is installed in contact with the main bearing; still include sealing member 7, its outer fringe is connected with the inner edge of fin 2, has seted up the vent on the sealing member 7, and first pipeline 5 is connected between box 9 air outlet and vent.
The seal 7 separates the hub interior 1 from the nacelle interior, and the air flow can only circulate between the two spaces via the first duct 5 or the cooling fins 2. The sealing element 7 may be a plate element with a certain stiffness or a flexible element with a gas flow barrier.
The main bearing is of annular configuration, the fins 2 are arranged in an inner ring of the main bearing, and the seal 7, which is also of substantially circular shape, is located in the inner ring enclosed by each fin 2 so that the air flow can only pass through the flow passage formed by the fin 2 and the inner ring of the bearing.
In the above embodiment, the air firstly enters the hub space through the first pipe 5, then flows into the heat exchange channel formed by the heat sink 2 through the hub space, returns to the cabin interior space 4, and finally enters the interior of the box body 9.
The air-liquid heat exchanger 6-5 in each of the above embodiments may comprise a plate fin heat exchanger.
The above-mentioned condensation device 4 may be an air-liquid condensation device 4, located outside the top wall of the nacelle. The air-liquid condensing device 4 relies on the outside air as a heat exchange medium, and the outside air cools the liquid circulating in the condensing device 4.
The induced draft fan 6-1 in the above embodiments can also be integrated inside the box 9, and is preferably close to the air outlet. Of course, the induced draft fan 6-1 is disposed in the manner described herein, and may also be disposed outside the box 9 or near the air inlet.
In each of the above embodiments, in order to realize accurate operation of the system, the environmental control system may further include a temperature sensor, where the temperature sensor is used to detect the operating temperature of the main bearing; when the working temperature of the main bearing is higher than a preset value, starting the air-liquid heat exchanger 6-5 and the refrigeration cycle device to cool the air simultaneously; and when the working temperature of the main bearing is lower than or equal to a preset value, only starting the air-liquid heat exchanger 6-5 to cool the air.
The preset value can be reasonably set according to specific application of the wind generating set, and the fact that the preset value is not disclosed herein does not hinder understanding and implementation of the technical scheme in the present document for a person skilled in the art.
Further, the above embodiment may further include a humidity sensor for detecting the environmental humidity of the nacelle inner space 4 or the hub inner space 1; when the working temperature of the main bearing is not higher than the preset value and the ambient humidity is higher than the preset value, the air-liquid heat exchanger 6-5 and the refrigeration cycle device are started simultaneously, and the temperature of the air flow passing through the evaporator 6-3 is controlled to be lower than the dew point. I.e. the dehumidification mode described hereinbefore.
Referring to fig. 2, fig. 2 is a flowchart of an environmental control method of a wind turbine generator system according to an embodiment of the present invention.
On the basis of the environment control system, the invention also provides an environment control method of the wind generating set, the environment control system of the wind generating set comprises a condensing device 4 positioned outside the engine room, an air-liquid heat exchanger 6-5 positioned inside the engine room and a refrigeration circulating device forming a refrigerant loop, and the refrigeration circulating device at least comprises a compressor, a condenser 6-2 and an evaporator 6-3 which are sequentially connected; the environmental control method comprises the following specific steps:
s1, detecting the working temperature of the main bearing of the hub;
s2, when the working temperature of the main bearing is higher than a preset value, starting the air-liquid heat exchanger 6-5 and the refrigeration cycle device to cool the air simultaneously; and when the working temperature of the main bearing is lower than or equal to a preset value, only starting the air-liquid heat exchanger 6-5 to cool the air.
In S1, the environmental humidity of the nacelle interior 3 or the hub interior 1 is further detected;
in step S2, the following determination is further made: when the working temperature of the main bearing is not higher than a preset value and the ambient humidity is higher than a preset value, the air-liquid heat exchanger 6-5 and the refrigeration cycle device are started simultaneously, and the temperature of the air flow passing through the evaporator 6-3 is controlled to be lower than the dew point so as to dehumidify the wind generating set.
Because the wind generating set provided by the invention is provided with the environment control system and the environment control method, the wind generating set and the environment control method both have the technical effects of the environment control system.
The wind generating set, the environmental control system and the environmental control method provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (12)
1. The environmental control system of the wind generating set is characterized by comprising a condensing device (4) positioned outside a cabin, an air-liquid heat exchanger (6-5) positioned inside the cabin and a refrigeration circulating device forming a refrigerant loop, wherein the refrigeration circulating device at least comprises a compressor, a condenser (6-2) and an evaporator (6-3) which are sequentially connected; the condensing device (4) is capable of forming a first cooling circuit with the air-liquid heat exchanger (6-5) to cool a heat exchange medium in the air-liquid heat exchanger (6-5), and the condensing device (4) is capable of forming a second cooling circuit with the condenser (6-2) to cool a refrigerant flowing through the condenser (6-2);
the air-liquid heat exchanger also comprises an induced draft fan (6-1) which is used for providing power for the air flow in the engine room to circulate through the air-liquid heat exchanger (6-5) and the evaporator (6-3).
2. The environmental control system of a wind generating set according to claim 1, further comprising a box (9) having an air outlet and an air inlet, wherein the box (9) is located in a cabin, and the air-liquid heat exchanger (6-5) and the refrigeration cycle device are integrated inside the box (9).
3. The environmental control system of wind generating set according to claim 2, characterized in that the air-liquid heat exchanger (6-5) and the evaporator (6-3) are arranged in sequence along the air flow direction, so that the air flow exchanges heat sequentially through the air-liquid heat exchanger (6-5) and the evaporator (6-3).
4. The environmental control system of the wind generating set according to claim 2, further comprising a first duct (5) and a main bearing heat sink assembly, wherein the first duct (5) is used for communicating the air outlet of the box body (9) with the hub space of the wind generating set; the main bearing heat dissipation assembly is used for forming a heat dissipation channel of the main bearing; the first duct (5), the hub space, the heat dissipation channel, the cabin interior space (3), and the box body (9) form an air circulation flow channel.
5. The environmental control system of a wind generating set according to claim 4, characterized in that the main bearing heat sink assembly comprises a plurality of heat sinks (2), each of the heat sinks (2) is arranged circumferentially along the main bearing and the outer edge is mounted in contact with the main bearing.
6. The environmental control system of a wind generating set according to claim 5, further comprising a sealing member (7), wherein the outer edge of the sealing member is connected with the inner edge of the heat sink (2), the sealing member (7) is provided with a ventilation opening, and the first pipeline (5) is connected between the air outlet of the box body (9) and the ventilation opening.
7. The environmental control system of wind power plants according to claim 4, characterized in that said air-liquid heat exchanger (6-5) comprises a plate fin heat exchanger; or/and the condensing device (4) is an air-liquid condensing device (4) and is positioned on the outer side of the top wall of the cabin.
8. The environmental control system of wind generating sets according to any one of claims 2 to 7, characterized in that the induced draft fan (6-1) is integrated inside the box (9) and close to the air outlet.
9. Wind power plant comprising a tower and a nacelle positioned on top of the tower, characterised in that it further comprises an environmental control system of a wind power plant according to any of claims 1 to 8, the air-liquid heat exchanger (6-5) and the refrigeration cycle device being located in the nacelle interior space (3), the condensation device (4) being located outside the nacelle.
10. The wind generating set of claim 9, wherein the heat generating components within the nacelle include a converter and a box transformer.
11. The environmental control method of the wind generating set is characterized in that the environmental control system of the wind generating set comprises a condensing device (4) positioned outside a cabin, an air-liquid heat exchanger (6-5) positioned inside the cabin and a refrigeration circulating device forming a refrigerant loop, wherein the refrigeration circulating device at least comprises a compressor, a condenser (6-2) and an evaporator (6-3) which are sequentially connected; the environmental control method comprises the following specific steps:
detecting the working temperature of a main bearing of the hub;
when the working temperature of the main bearing is higher than a preset value, starting the air-liquid heat exchanger (6-5) and the refrigeration cycle device to cool air simultaneously; and when the working temperature of the main bearing is lower than or equal to a preset value, only starting the air-liquid heat exchanger (6-5) to cool the air.
12. Method for environmental control of a wind park according to claim 11, wherein the ambient humidity of the nacelle interior (3) or the hub interior (1) is further detected;
and when the working temperature of the main bearing is not higher than the preset value and the ambient humidity is higher than a preset value, simultaneously starting the air-liquid heat exchanger (6-5) and the refrigeration cycle device, and controlling the temperature of the airflow passing through the evaporator (6-3) to be lower than the dew point so as to dehumidify the wind generating set.
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