CN111535997B - Thermal simulation system and equipment with same - Google Patents
Thermal simulation system and equipment with same Download PDFInfo
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- CN111535997B CN111535997B CN201911422131.8A CN201911422131A CN111535997B CN 111535997 B CN111535997 B CN 111535997B CN 201911422131 A CN201911422131 A CN 201911422131A CN 111535997 B CN111535997 B CN 111535997B
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- 238000004088 simulation Methods 0.000 title claims abstract description 56
- 238000012360 testing method Methods 0.000 claims abstract description 24
- 239000003507 refrigerant Substances 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 52
- 230000001105 regulatory effect Effects 0.000 claims description 28
- 238000005057 refrigeration Methods 0.000 claims description 15
- 230000007613 environmental effect Effects 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 7
- 230000033228 biological regulation Effects 0.000 claims description 2
- 238000010248 power generation Methods 0.000 abstract description 5
- 239000003570 air Substances 0.000 description 76
- 238000012546 transfer Methods 0.000 description 54
- 239000002826 coolant Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 239000012085 test solution Substances 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
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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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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- 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 relates to the technical field of power generation, in particular to a thermal simulation system and equipment with the same. A thermal simulation system comprising: the refrigerant of the refrigerating unit exchanges heat with air in the external environment and a first heat exchange medium in the first heat exchange pipeline respectively; the second heat exchange system comprises a second heat exchanger, a second heat exchange medium in the second heat exchanger exchanges heat with air in the external environment, the outlet end of the first heat exchange pipeline and the outlet end of the second heat exchanger are connected with an environment inlet where the component to be tested is located, and the inlet end of the first heat exchange pipeline and the inlet end of the second heat exchanger are connected with an environment outlet where the component to be tested is located. The refrigerating unit is arranged in the first heat exchange system to exchange heat with the external atmosphere, so that the ambient temperature of the part to be tested can reach any temperature lower than the external ambient temperature, the part to be tested can not be completely controlled by the limitation of the external ambient temperature, and the low-temperature range of the thermal test of the part to be tested is improved.
Description
Technical Field
The invention relates to the technical field of power generation, in particular to a thermal simulation system and equipment with the same.
Background
With the increasing of the capacity of a single machine of the generator set, the installation environment of the generator set becomes severer, and the thermal problems of the whole machine, subsystems and subcomponents become great challenges for the design and operation of the generator set. The wind generating set is taken as an example for explanation, in terms of the capacity of a single machine of the set, the capacity level of the single machine is developed to be higher than 8MW and 10MW, the heat production of the set per se reaches hundreds KW or MW level, and the huge heat consumption becomes the largest restriction factor for the temperature rise control of the whole machine, a subsystem and subcomponents; as for the operation environment of the machine assembly machine, the temperature environment of a high-temperature area exceeds 40 ℃, the temperature rise indexes of all subsystems and parts become key restriction factors for ensuring the operation of the machine set in the high-temperature environment.
For an air-cooled generator, a heat exchange system shown in fig. 1 is adopted, and the heat exchange system includes a second heat exchanger 14, a generator air-liquid heat exchanger 17, an outlet end 15 of a first heat exchange pipeline, an inlet end 16 of the first heat exchange pipeline, a generator air outlet pipeline 18, a generator return air pipeline 19, a generator 11, a cabin 12, and the like. The heat exchange system can fully utilize incoming wind energy to dissipate heat of the generator set through the second heat exchanger 14 placed at the top of the cabin 12, hot air generated in the running process of the generator exchanges heat with low-temperature cooling medium conveyed through the outlet end 15 of the first heat exchange pipeline in the air-liquid heat exchanger 17 of the generator through the air outlet pipeline 18 of the generator, low-temperature air returns to the inside of the generator through the air return pipeline 19 of the generator, and the heated cooling medium flows out to the second heat exchanger 14 through the inlet end 16 of the first heat exchange pipeline to cool, so that the heat dissipation circulation of the generator is completed. For a water-cooled generator, a heat exchange system is used as shown in fig. 2, which comprises a second heat exchanger 14, an outlet end 15 of a first heat exchange pipeline, an inlet end 16 of the first heat exchange pipeline, a generator 11 cabin 12 and the like. The heat exchange system can fully utilize incoming wind energy to dissipate heat of the generator set through the second heat exchanger 14 placed at the top of the engine room 12, heat generated in the running process of the generator is directly exchanged through low-temperature cooling medium conveyed by the outlet end 15 of the first heat exchange pipeline, and the heated cooling medium flows out of the inlet end 16 of the first heat exchange pipeline to the second heat exchanger 14 to be cooled, so that the heat dissipation circulation of the generator is completed.
The heat exchange systems of the two wind generating sets adopt natural wind as a cold source for heat exchange, if the heat exchange systems are adopted for carrying out thermal environment simulation test on the wind generating sets, the influence of the environmental temperature is large, the corresponding environmental temperatures in different time periods in four seasons are different, the external environments of different geographical position areas are different, and the environmental temperature levels of the generators measured by the test systems are also different.
Therefore, how to thermally test a wider temperature range for a heat-generating component becomes an urgent problem to be solved.
Disclosure of Invention
The invention mainly aims to provide a thermal simulation system for improving the temperature range of thermal testing of a heat-generating component and equipment with the thermal simulation system.
The invention provides a thermal simulation system for simulating the ambient temperature of a component to be tested, which comprises:
the first heat exchange system comprises a first heat exchange pipeline and a refrigerating unit, wherein a refrigerant in a condenser of the refrigerating unit exchanges heat with air in the external environment, a refrigerant in an evaporator of the refrigerating unit exchanges heat with a first heat exchange medium in the first heat exchange pipeline, the outlet end of the first heat exchange pipeline is communicated with an environment inlet where the component to be detected is located, and the inlet end of the first heat exchange pipeline is communicated with an environment outlet where the component to be detected is located;
and the second heat exchange system comprises a second heat exchanger, a second heat exchange medium in the second heat exchanger exchanges heat with air in the external environment, the outlet end of the second heat exchanger is connected with an environment inlet where the component to be detected is located, and the inlet end of the second heat exchanger is connected with an environment outlet where the component to be detected is located.
The first heat exchange system is arranged, the refrigerating unit is arranged in the first heat exchange system to exchange heat with air in the external environment, the first heat exchange medium after heat exchange is led to an environment inlet where the component to be tested is located, because the refrigerating unit is arranged, the environment temperature of the part to be measured can reach any temperature lower than the external environment temperature, by arranging the second heat exchange system, the second heat exchange medium of the second heat exchange system exchanges heat with the air in the external environment and then leads to the environment inlet where the component to be tested is positioned, so that the environmental temperature of the component to be tested can reach the temperature close to the air temperature of the external environment, thus, the thermal simulation system in embodiments of the present invention may not be fully controlled by the limits of the ambient temperature, the environment temperature of the to-be-tested part can be widened, the low-temperature range of the thermal test of the to-be-tested part is improved, and the performance of the to-be-tested part at more low-temperature environment temperatures can be tested.
The second heat exchange system further comprises: the heat exchange chamber is provided with at least one air inlet and at least one air outlet, the second heat exchanger is arranged in the heat exchange chamber, and the air inlet and the air outlet are respectively communicated with the external environment.
Through set up the heat transfer room in second heat transfer system, be equipped with the second heat exchanger in the heat transfer room, make the second heat exchanger can be with heat transfer to the heat transfer room with the second heat transfer medium of the high temperature after the part heat transfer that awaits measuring, make can build the environment of high temperature in the heat transfer room, through be equipped with at least one air intake and at least one air outlet with external environment intercommunication respectively on the heat transfer room, can introduce external environment air in the heat transfer room through the switching of adjusting air intake and air outlet, mix with the high temperature air in the heat transfer room, so that the temperature in the heat transfer room can be adjusted to the arbitrary temperature that is higher than external environment temperature, improve the high temperature range of the part thermal test that awaits measuring, and then can test the performance that the part that awaits measuring.
The first heat exchange system further comprises a first heat exchanger and a second heat exchange pipeline, wherein the inlet end of the second heat exchange pipeline is connected with the outlet end of the first heat exchanger, the outlet end of the second heat exchange pipeline is connected with the inlet end of the first heat exchanger, and a third heat exchange medium in the second heat exchange pipeline exchanges heat with a refrigerant in the condenser when flowing in the second heat exchange pipeline and exchanges heat with air in the external environment when flowing through the first heat exchanger.
Through set up first heat exchanger and second heat transfer pipeline on first heat transfer system for external environment air can carry out the heat transfer with the refrigerant in the refrigerating unit after earlier with first heat exchanger heat transfer, has improved heat exchange efficiency.
The first heat exchange pipeline is provided with a first flow regulating component; and/or a second flow regulating component is arranged on the second heat exchange pipeline.
Through set up flow control part on first heat exchange pipeline and second heat exchange pipeline, can adjust the flow of the heat transfer medium on two heat exchange pipelines to make its better realization heat transfer, realize the different ambient temperature that the part that awaits measuring is located.
The first flow regulating component and/or the second flow regulating component is/are variable frequency pumps.
The first heat exchange system further comprises an auxiliary heat exchanger which is arranged in parallel with the refrigerating unit, a first auxiliary heat exchange pipeline is arranged on one side of the auxiliary heat exchanger, the inlet end of the first auxiliary heat exchange pipeline is connected with the inlet end of the first heat exchange pipeline, and the outlet end of the first auxiliary heat exchange pipeline is connected with the outlet end of the first heat exchange pipeline; and a second auxiliary heat exchange pipeline is arranged on the other side of the auxiliary heat exchanger, the inlet end of the second auxiliary heat exchange pipeline is connected with the outlet end of the second heat exchange pipeline, and the outlet end of the second auxiliary heat exchange pipeline is connected with the inlet end of the second heat exchange pipeline.
Through set up the auxiliary heat exchanger that sets up with the refrigerating unit parallelly connected on first heat transfer system to with the auxiliary heat exchanger through first auxiliary heat transfer pipeline and the heat transfer is carried out with first heat transfer pipeline and second heat transfer pipeline respectively to the auxiliary heat exchanger, when making the temperature after first heat exchanger and the heat transfer of external environment air if can satisfy the ambient temperature's that the part that awaits measuring is located demand, can make first heat transfer medium and third heat transfer medium directly carry out the heat transfer through auxiliary heat exchanger, and need not to open the refrigerating unit, make the operation of thermal simulation system more energy-conserving.
The thermal simulation system of the embodiment of the invention further comprises a third heat exchange pipeline, wherein a second heat exchange medium in the third heat exchange pipeline exchanges heat with the external environment air through the second heat exchanger, the outlet end of the third heat exchange pipeline is connected with the environment inlet where the component to be detected is located, and the inlet end of the third heat exchange pipeline is connected with the environment outlet where the component to be detected is located; and the outlet end of the first heat exchange pipeline is connected with a pipeline of the third heat exchange pipeline between the second heat exchanger and the environment inlet of the component to be detected, and the inlet end of the first heat exchange pipeline is connected with a pipeline of the third heat exchange pipeline between the second heat exchanger and the environment outlet of the component to be detected.
The third heat exchange pipeline is connected with the environment inlet and the environment outlet of the component to be tested, and the first heat exchange pipeline is connected with the environment of the component to be tested through the third heat exchange pipeline, so that the overall structure of the thermal simulation system is simpler, and the volume is smaller.
A third opening and closing valve is arranged on the third heat exchange pipeline; and/or a first opening and closing valve is arranged on the first heat exchange pipeline.
The thermal simulation system of an embodiment of the present invention further comprises: the first temperature detection device is arranged at an environment inlet where the component to be detected is positioned; and the controller is connected with the first temperature detection device and used for controlling the first heat exchange system or the second heat exchange system to adjust the ambient temperature of the component to be detected according to the detection value of the first temperature detection device.
The first temperature detection device is arranged at the position of an environment inlet where the part to be detected is located, the environment temperature value where the part to be detected is located can be detected in real time, the part to be detected is conveniently subjected to thermal testing, and the controller is connected with the first temperature detection device, so that the controller can automatically control the first heat exchange system or the second heat exchange system to adjust the environment temperature where the part to be detected is located according to the detection value of the first temperature detection device, and the automatic control of the thermal simulation system is realized.
When the detection value of the first temperature detection device is larger than or equal to the external environment temperature, the controller controls the second heat exchange system to adjust the environment temperature of the component to be detected;
when the detection value of the first temperature detection device is smaller than the external environment temperature, the controller controls the first heat exchange system to adjust the environment temperature of the component to be detected.
Through comparing the detected value of first temperature-detecting device with external environment temperature, and when the detected value of first temperature-detecting device was more than or equal to external environment temperature, the controller controlled second heat transfer system and adjusted the ambient temperature that the part that awaits measuring was located, when the detected value of first temperature-detecting device was less than external environment temperature, the controller controlled first heat transfer system and adjusted the ambient temperature that the part that awaits measuring was located, make first heat transfer and second heat transfer system can operate respectively under different operating modes, make the operation of thermal simulation system more energy-conserving.
The temperature value of the heat exchange chamber is T0；
When T is0-T<The temperature is 5 ℃, the first operation state is realized, the controller controls the air inlet and the air outlet of the heat exchange chamber to be completely opened, and the second heat exchanger is in rated power operation;
when T is0When the temperature T is more than or equal to 15 ℃, the second operation state is adopted, the controller controls the opening number of the air inlet and the air outlet of the heat exchange chamber to be smaller than the opening number in the first operation state, and the operation power of the second heat exchanger is smaller than the operation power in the first operation state;
when the temperature is less than or equal to 5 ℃ and T is less than or equal to0-T<And the temperature is a third operation state at 15 ℃, the controller controls the opening number of the air inlet and the air outlet of the heat exchange chamber to be smaller than that in the first operation state, and the operation power of the second heat exchanger is equal to that in the first operation state.
When t is0-T>The temperature of the first heat exchange system is 10 ℃, the controller controls the refrigeration unit to start, the first flow regulating component and the second flow regulating component of the first heat exchange system are in rated power operation, and the first heat exchanger is in rated power operation;
when t is less than or equal to 5 DEG C0When the temperature T is less than or equal to 10 ℃, the refrigeration unit is in a fifth operation state, the controller controls the refrigeration unit to be closed, the auxiliary heat exchanger of the first heat exchange system is opened, the operation power of the first flow regulating component and the second flow regulating component is smaller than the operation power in the fourth operation state, and the operation power of the first heat exchanger is smaller than the operation power in the fourth operation state;
when t is0And when the temperature T is less than 5 ℃, the operation state is a sixth operation state, the controller controls the refrigeration unit to be closed, the auxiliary heat exchanger is opened, the operation power of the first flow regulating component and the second flow regulating component is equal to the operation power in the fourth operation state, and the operation power of the first heat exchanger is equal to the operation power in the fourth operation state.
The part to be tested is a wind generating set.
A second aspect of embodiments of the present invention provides an apparatus having a thermal simulation system, comprising the thermal simulation system described above.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a heat exchange system of a wind turbine provided in the prior art;
FIG. 2 is a schematic structural diagram of another heat exchange system of a wind turbine generator system provided in the prior art;
FIG. 3 is a schematic structural diagram of a thermal simulation system of an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a second heat exchange system according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a second heat exchanger according to an embodiment of the present invention;
FIG. 6 is a flow chart of the operation of the thermal simulation system of an embodiment of the present invention.
Description of reference numerals:
11-a generator; 12-a nacelle; 13-second temperature detection means; 14-a second heat exchanger; 15-an outlet end of the third heat exchange line; 16-an inlet end of a third heat exchange line; 17-generator air-liquid heat exchanger; 18-generator air outlet pipeline; 19-generator return air line; 20-a first heat exchanger; 21-a second opening/closing valve; 22-a refrigeration unit; 23-a first flow regulating component; 24-a pressure sensor; 25-first opening/closing valve; 26-a second flow regulating component; 27-a third opening and closing valve; 28-a first temperature detection device; 29-a flow meter; 30-an auxiliary heat exchanger; 31-a heat exchange chamber; 32-air inlet; 33-air outlet; 34-third temperature detection means; 35-a heat exchanger body; 36-a fan; 37-a first heat exchange circuit; 38-a second heat exchange circuit; 39-third heat exchange circuit; 40-a first auxiliary heat exchange line; 41-a second auxiliary heat exchange line; 42-inlet end of first heat exchange line; 43-an outlet end of the first heat exchange line; 44-an inlet end of the second heat exchange line; 45-an outlet end of the second heat exchange line; 46-an inlet end of a first auxiliary heat exchange line; 47-outlet end of first auxiliary heat exchange line; 48-inlet end of second auxiliary heat exchange line; 49-outlet end of second auxiliary heat exchange line; i, a first heat exchange system; II-a second heat exchange system.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiment provides a thermal simulation system, which is used for simulating a test environment when a temperature rise test is performed on a component to be tested, the thermal simulation system can test the environment temperature of the component to be tested, and the component to be tested can be a generating set, a motor or a heat-generating component such as an automobile engine. In this embodiment, a generator set is taken as an example for description, and other heat generating components to be tested are also applicable to the present invention. The generator set, for example, a wind turbine generator set, may be tested outdoors, for example, in a wind farm or other power generation farms, using the thermal simulation system, which may omit building a thermostatic chamber, save cost, facilitate testing, may also be used indoors or in a specific experimental site, may have a wider range of tested environmental temperatures, and may provide different operating environmental temperatures at which the wind turbine generator set is located, specifically referring to fig. 3, the thermal simulation system includes: the heat exchanger comprises a first heat exchange system I and a second heat exchange system II.
The first heat exchange system i comprises a first heat exchange pipeline 37 and the refrigerating unit 22, wherein a refrigerant in a condenser of the refrigerating unit 22 exchanges heat with air in an external environment, a refrigerant in an evaporator of the refrigerating unit 22 exchanges heat with a first heat exchange medium in the first heat exchange pipeline 37, an outlet end 43 of the first heat exchange pipeline is communicated with an environment inlet where the wind generating set is located, and an inlet end 42 of the first heat exchange pipeline is communicated with an environment outlet where the wind generating set is located.
The second heat exchange system II comprises a second heat exchanger 14, a second heat exchange medium in the second heat exchanger 14 exchanges heat with air in the external environment, the outlet end of the second heat exchanger 14 is connected with an environment inlet where the wind generating set is located, and the inlet end of the second heat exchanger 14 is connected with an environment outlet where the wind generating set is located.
The thermal simulation system in the embodiment of the invention can be not completely controlled by the limitation of the external environment temperature, the environment temperature of the wind generating set can be widened, and the low-temperature range of the wind generating set thermal test can be improved by arranging the first heat exchange system I, arranging the refrigerating unit 22 in the first heat exchange system I to exchange heat with the air in the external environment, leading the first heat exchange medium after heat exchange to the environment inlet of the wind generating set, leading the environment temperature of the wind generating set to be any temperature lower than the external environment temperature due to the arrangement of the refrigerating unit 22, and leading the second heat exchange medium of the second heat exchange system II to the environment inlet of the wind generating set after heat exchange with the air in the external environment by arranging the second heat exchange system II, and further, the performance of the wind generating set under more low-temperature environment temperatures can be tested.
Specifically, the air in the external environment in the present embodiment is the external ambient atmosphere. As an alternative embodiment, the air in the external environment may be air in another environment than the environment in which the wind turbine generator system is located.
In order to make the thermal test temperature range of the wind turbine generator set higher, as shown in fig. 4, the second heat exchange system ii in this embodiment further includes: the heat exchange chamber 31 is a closed space, three air inlets 32 and two air outlets 33 are arranged on the heat exchange chamber 31, the second heat exchanger 14 is arranged in the heat exchange chamber 31, and the air inlets 32 and the air outlets 33 are respectively communicated with the external environment. Through set up heat exchange chamber 31 in second heat transfer system II, be equipped with second heat exchanger 14 in heat exchange chamber 31, make second heat exchanger 14 and the second heat transfer medium of the high temperature after the wind generating set heat transfer can be with heat transfer to heat exchange chamber 31 in, make can build the environment of high temperature in the heat exchange chamber 31, through be equipped with air intake 32 and the air outlet 33 with external environment intercommunication respectively on heat exchange chamber 31, can introduce external environment air into heat exchange chamber 31 through the switching of adjusting air intake 32 and air outlet 33, mix with the high temperature air in the heat exchange chamber 31, so that the temperature in the heat exchange chamber 31 can be adjusted to the arbitrary temperature that is higher than external environment temperature, the high temperature range of wind generating set heat test is improved, and then can be in the performance test under more high temperature environment temperature to wind generating set. As an alternative embodiment, both the air inlet and the air outlet may be one, or the specific number of the air inlet and the air outlet may be set according to actual needs.
As shown in fig. 5, the second heat exchanger 14 in the present embodiment includes a heat exchanger body 35 and a fan 36 disposed on the heat exchanger body 35, the fan 36 is used for enhancing the heat exchange between the second heat exchange medium and the air in the external environment, and the fan 36 in the present embodiment is operated with variable power. As an alternative embodiment, no fan may be provided on the second heat exchanger 14, or the fan 36 may be operated at constant power.
As shown in fig. 3, the first heat exchange system i in this embodiment further includes a first heat exchanger 20 and a second heat exchange pipeline 38, an inlet end 44 of the second heat exchange pipeline is connected to an outlet end of the first heat exchanger 20, an outlet end 45 of the second heat exchange pipeline is connected to an inlet end of the first heat exchanger 20, and a third heat exchange medium in the second heat exchange pipeline 38 exchanges heat with a refrigerant in the condenser when flowing in the second heat exchange pipeline 38, and exchanges heat with air in an external environment when flowing through the first heat exchanger 20. Through setting up first heat exchanger 20 and second heat exchange pipeline 38 on first heat transfer system I for external environment air can carry out the heat transfer with the refrigerant in refrigerating unit 22 after with first heat exchanger 20 heat transfer earlier, has improved heat exchange efficiency. Alternatively, the air in the external environment may be directly exchanged with the refrigeration unit 22 without providing the first heat exchanger 20 and the second heat exchange line 38.
In this embodiment, the first heat exchange pipeline 37 is provided with the first flow regulating component 23, and the second heat exchange pipeline 38 is provided with the second flow regulating component 26. By arranging the flow regulating components on the first heat exchange pipeline 37 and the second heat exchange pipeline 38, the flow of the heat exchange medium on the two heat exchange pipelines can be regulated, so that the heat exchange is better realized, and different environmental temperatures of the wind generating set are realized. Specifically, the first flow rate regulating component 23 and the second flow rate regulating component 26 are variable frequency pumps, and the flow rate of the heat exchange medium is regulated by changing the output of the variable frequency pumps, so as to regulate the flow rate of the heat exchange medium. As an alternative embodiment, the first flow rate adjustment member 23 may be provided only on the first heat exchange line 37; or only the second flow amount adjustment part 26 is provided on the second heat exchange line 38. As a changeable embodiment, the first flow rate adjusting member 23 and the second flow rate adjusting member 26 may be flow rate adjusting valves; alternatively, the first flow rate adjustment unit 23 and the second flow rate adjustment unit 26 may be any combination of an inverter pump and a flow rate adjustment valve.
The first heat exchange system i in this embodiment further includes an auxiliary heat exchanger 30, which is arranged in parallel with the refrigeration unit 22, one side of the auxiliary heat exchanger 30 is provided with a first auxiliary heat exchange pipeline 40, an inlet end 46 of the first auxiliary heat exchange pipeline is connected with an inlet end 42 of the first heat exchange pipeline, and an outlet end 47 of the first auxiliary heat exchange pipeline is connected with an outlet end 43 of the first heat exchange pipeline; a second auxiliary heat exchange pipeline 41 is arranged at the other side of the auxiliary heat exchanger 30, an inlet end 48 of the second auxiliary heat exchange pipeline is connected with an outlet end 45 of the second heat exchange pipeline, and an outlet end 49 of the second auxiliary heat exchange pipeline is connected with an inlet end 44 of the second heat exchange pipeline. Through setting up the auxiliary heat exchanger 30 that sets up with refrigerating unit 22 parallelly connected on first heat transfer system I to with auxiliary heat exchanger 30 respectively with first heat transfer pipeline 37 and second heat transfer pipeline 38 heat transfer through first auxiliary heat transfer pipeline 40 and second auxiliary heat transfer pipeline 41, when making the temperature after first heat exchanger 20 and the ambient air heat transfer can satisfy the demand of the ambient temperature that wind generating set located, can make first heat transfer medium and third heat transfer medium directly carry out the heat transfer through auxiliary heat exchanger 30, and need not to open refrigerating unit 22, make the operation of thermal simulation system more energy-conserving. As an alternative embodiment, the auxiliary heat exchanger 30 and the first and second auxiliary heat exchange lines 40, 41 may not be provided.
The thermal simulation system in the embodiment further includes a third heat exchange pipeline 39, a second heat exchange medium in the third heat exchange pipeline 39 exchanges heat with the external ambient air through the second heat exchanger 14, an outlet end 15 of the third heat exchange pipeline 39 is connected with an ambient inlet where the wind generating set is located, and an inlet end 16 of the third heat exchange pipeline 39 is connected with an ambient outlet where the wind generating set is located; and the outlet end 43 of the first heat exchange pipeline is connected with a pipeline of the third heat exchange pipeline 39 between the second heat exchanger 14 and the environment inlet of the wind generating set, and the inlet end 42 of the first heat exchange pipeline is connected with a pipeline of the third heat exchange pipeline 39 between the second heat exchanger 14 and the environment outlet of the wind generating set. The third heat exchange pipeline 39 is connected with the environment inlet and the environment outlet of the wind generating set, and the first heat exchange pipeline 37 is connected with the environment of the wind generating set through the third heat exchange pipeline 39, so that the overall structure of the thermal simulation system is simpler, and the volume is smaller. As an alternative embodiment, the second heat exchange system ii may be connected to the environment of the wind turbine generator system through a third heat exchange pipeline 39, and the first heat exchange system i may be directly connected to the environment of the wind turbine generator system through a first heat exchange pipeline 37.
In this embodiment, the third heat exchange pipeline 39, the first heat exchange pipeline 37, and the second heat exchange pipeline 38 are respectively provided with a third opening/closing valve 27, a first opening/closing valve 25, and a second opening/closing valve 21, where the third opening/closing valve 27 is a three-way valve, and may be used to close the second heat exchange system ii when the first heat exchange system i operates, or close the first heat exchange system i when the second heat exchange system ii operates, the second opening/closing valve 21 is a three-way valve, and may be used to control the opening/closing of the second heat exchange pipeline or the second auxiliary heat exchange pipeline, and the first opening/closing valve 25 is a three-way valve, and may be used to control the opening/. Specifically, the opening and closing valve in the present embodiment is a ball valve. As an alternative embodiment, only the first heat exchange line 37 may be provided with an on-off valve. As an alternative embodiment, the opening/closing valve may be a butterfly valve. As a switchable embodiment, the third opening/closing valve 27, the second opening/closing valve 21, and the first opening/closing valve 25 may be two-way valves, and the opening/closing of each heat exchange system or each heat exchange line may be realized by a three-way pipe joint.
The thermal simulation system in this embodiment further includes: and the first temperature detection device 28 is arranged at an environmental inlet where the wind generating set is positioned. Through setting up first temperature-detecting device 28 at the environment entrance that wind generating set located, can real-time detection wind generating set's ambient temperature value of locating, be convenient for carry out the thermal test to wind generating set.
The thermal simulation system in this embodiment further includes: and the controller is connected with the first temperature detection device 28 and is used for controlling the first heat exchange system I or the second heat exchange system II to adjust the ambient temperature of the wind generating set according to the detection value of the first temperature detection device 28. Through setting up the controller of being connected with first temperature-detecting device 28 for the controller can be according to the detected value automatic control first heat transfer system I of first temperature-detecting device 28 or second heat transfer system II and adjust the ambient temperature that wind generating set was located, has realized the automated control of thermal simulation system. As an alternative embodiment, a person may manually control the operation of the first heat exchange system i or the second heat exchange system ii according to the detected temperature value of the first temperature detection device 28 without providing a controller.
When the detection value of the first temperature detection device 28 is greater than or equal to the external environment temperature, the controller controls the second heat exchange system II to adjust the environment temperature of the wind generating set; when the detection value of the first temperature detection device 28 is smaller than the outside environment temperature, the controller controls the first heat exchange system I to adjust the environment temperature of the wind generating set. Through comparing the detected value of first temperature detection device 28 with external environment temperature, and when the detected value of first temperature detection device 28 was greater than or equal to external environment temperature, the environmental temperature that wind generating set was located was adjusted to second heat transfer system II of controller control, when the detected value of first temperature detection device 28 was less than external environment temperature, the environmental temperature that wind generating set was located was adjusted to first heat transfer system I of controller control, make first heat transfer and second heat transfer system II can operate respectively under different operating modes, make the operation of thermal simulation system more energy-conserving. As an alternative embodiment, the controller may control the first heat exchanging system i and the second heat exchanging system ii to operate intermittently according to the detected value of the first temperature detecting device 28, for example, after the first heat exchanging system i operates for a certain time, the second heat exchanging system ii operates for a certain time, and then the first heat exchanging system i operates to realize the alternating control of the temperature.
For better adjustment of the operation of the first heat exchange system i and the second heat exchange system ii, the thermal simulation system in this embodiment further includes a second temperature detection device 13 connected to the controller, the second temperature detection device 13 is disposed on a pipeline of the third heat exchange pipeline 39 between the second heat exchanger 14 and the environment outlet end where the wind generating set is located, that is, the ambient temperature of the wind generating set can be adjusted by controlling parameters such as the flow of heat exchange media in the first heat exchange system i and the second heat exchange system ii according to the temperature of the environment outlet end where the wind generating set is located. As an alternative embodiment, the second temperature detection device 13 may not be provided.
In order to monitor the temperature of the heat exchange chamber 31, a third temperature detection device 34 connected with a controller is further arranged in the heat exchange chamber 31, the temperature of the heat exchange chamber 31 can be monitored in real time, the air inlet 32 and the air outlet 33 of the control chamber are also connected with the controller, and the controller can control the opening and closing of the air inlet 32 and the air outlet 33 and adjust the temperature in the heat exchange chamber 31 in time according to the detection value of the third temperature detection device 34, the external environment temperature and the detection value of the first temperature detection device 28. Specifically, the first temperature detection device 28, the second temperature detection device 13, and the third temperature detection device 34 in the present embodiment are all temperature sensors. As an alternative embodiment, the first temperature detection device 28, the second temperature detection device 13, and the third temperature detection device 34 may be thermocouples, or any combination of thermocouples and temperature sensors, or other devices capable of detecting temperature.
The first heat exchange medium, the second heat exchange medium, and the third heat exchange medium may be liquid cooling mediums or gaseous cooling mediums, in this embodiment, a liquid cooling medium, for example, water, is taken as an example of the cooling medium, and other types of cooling mediums are also applicable. The first heat exchanger 20 can be an air-liquid heat exchanger such as a cooling tower, an air-water heat exchanger and the like, and can be formed by connecting one or more than one heat exchanger in parallel; the second heat exchanger 14 is an air-water heat exchanger.
In order to facilitate the regulation of the thermal simulation system, the first heat exchange line 37 in this embodiment is further provided with a pressure sensor 24, and the third heat exchange line 39 is further provided with a flow meter 29. As an alternative embodiment, a pressure sensor and a flow meter may also be provided on the second heat exchange line 38; alternatively, a pressure sensor is arranged on the third heat exchange pipeline 39, and a flow meter is arranged on the first heat exchange pipeline 37; alternatively, the pressure sensor and the flow meter may not be provided.
The thermal simulation system in the embodiment is not limited by the influence and limitation of the external environment temperature change at different time intervals throughout the year and a day, but different test temperatures are realized by the mixture of the air temperature in the external environment, the heat exchange of the refrigerating unit 22, the air temperature in the external environment and the return temperature of the wind generating set, and the test temperature range of the wind generating set is improved. Specifically, in the case of a water-cooled or air-water-air-cooled generator, since the temperature of the cooling liquid or the cooling air inside the generator is affected by the temperature of the external cooling water, and there is a certain conversion relationship between the two, it is possible to control the ambient temperature of the wind turbine generator system by using the temperature of the external heat exchange medium, i.e., the temperature detected by the first temperature detection device 28.
In order to make the thermal simulation system more energy-saving, according to the requirements of different test temperatures of the wind generating set, as shown in fig. 6, the operation conditions of the thermal simulation system in this embodiment are as follows:
the temperature value T detected by the first temperature detecting means 28 is greater than or equal to the outside ambient temperature T0Meanwhile, the controller controls the first on-off valve 25 on the first heat exchange pipeline 37 to be closed, and the second heat exchange system II operates, specifically, according to the detected temperature value T of the third temperature detection device 34 of the heat exchange chamber 310The relationship with the detected temperature value T of the first temperature detection device 28 is controlled by:
when T is0-T<When the temperature is 5 ℃, the first operation state is realized, the controller controls the air inlet 32 and the air outlet 33 of the heat exchange chamber 31 to be completely opened, and the fan 36 of the second heat exchanger 14 operates at rated power, namely full power;
when T is0When the temperature T is more than or equal to 15 ℃, the second operation state is realized, the controller controls the air inlet 32 and the air outlet 33 of the heat exchange chamber 31 to be partially opened, and the fan 36 of the second heat exchanger 14 is in partial power operation;
when the temperature is less than or equal to 5 ℃ and T is less than or equal to0-T<And when the temperature is 15 ℃, the third operation state is realized, the controller controls the air inlet 32 and the air outlet 33 of the heat exchange chamber 31 to be partially opened, and the fan 36 of the second heat exchanger 14 is in a full-power operation state.
The temperature value T detected by the first temperature detection device 28 is less than the air temperature T in the external environment0In the meantime, the controller controls the opening and closing valve on the first heat exchange pipeline 37 to be opened, and the first heat exchange system I operates, specifically, according to the air temperature t in the external environment0The relationship with the detected temperature value T of the first temperature detection device 28 is controlled by:
when t is0-T>The fourth running state is at 10 ℃, the controller controls the refrigerating unit 22 to be started, the two variable frequency pumps to run at rated power, namely full power, and the first heat exchanger 20 to run at rated power, namely full power;
when t is less than or equal to 5 DEG C0When the temperature T is less than or equal to 10 ℃, the controller controls the refrigeration unit 22 to be closed, the auxiliary heat exchanger 30 to be opened, the two variable frequency pumps to run partially with power, and the first heat exchanger 20 to run partially with power;
when t is0When the temperature is less than 5 ℃, the operation state is a sixth operation state, the controller controls the refrigeration unit 22 to be closed, the auxiliary heat exchanger 30 to be opened, the two variable frequency pumps to be operated at full power, and the first heat exchanger 20 to be operated at full power;
when the refrigeration unit 22 is turned off, the first heat exchanger 20 may be a cooling tower capable of reducing the temperature from the dry bulb temperature to the wet bulb temperature of the air in the external environment without turning on the refrigeration unit 22, so that the thermal simulation system is more energy efficient.
The thermal simulation system provided by the embodiment can be applied to actual generator power generation places, for example, wind generating set tests can be carried out in the wind power generation places, the thermal simulation system can also be used for tests in experiments, and various test solutions can be provided.
The embodiment also provides equipment with a thermal simulation system, which comprises the wind generating set and the thermal simulation system.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (13)
1. A thermal simulation system for simulating an ambient temperature at which a component under test is located, comprising:
the first heat exchange system (I) comprises a first heat exchange pipeline (37) and a refrigerating unit (22), wherein a refrigerant in a condenser of the refrigerating unit (22) exchanges heat with air in the external environment, a refrigerant in an evaporator of the refrigerating unit (22) exchanges heat with a first heat exchange medium in the first heat exchange pipeline (37), an outlet end (43) of the first heat exchange pipeline is communicated with an environment inlet where the component to be detected is located, and an inlet end (42) of the first heat exchange pipeline is communicated with an environment outlet where the component to be detected is located;
the second heat exchange system (II) comprises a second heat exchanger (14), a second heat exchange medium in the second heat exchanger (14) exchanges heat with air in the external environment, the outlet end of the second heat exchanger (14) is connected with an environment inlet where the component to be tested is located, and the inlet end of the second heat exchanger (14) is connected with an environment outlet where the component to be tested is located;
a third heat exchange pipeline (39), wherein a second heat exchange medium in the third heat exchange pipeline (39) exchanges heat with the external environment air through the second heat exchanger (14), an outlet end (15) of the third heat exchange pipeline is connected with an environment inlet where the component to be tested is located, and an inlet end (16) of the third heat exchange pipeline is connected with an environment outlet where the component to be tested is located; and the outlet end (43) of the first heat exchange pipeline is connected with the third heat exchange pipeline (39) through a pipeline between the second heat exchanger (14) and the environment inlet where the component to be detected is located, and the inlet end (42) of the first heat exchange pipeline is connected with the third heat exchange pipeline (39) through a pipeline between the second heat exchanger (14) and the environment outlet where the component to be detected is located.
2. The thermal simulation system according to claim 1, wherein the second heat exchange system (ii) further comprises:
the heat exchanger comprises a heat exchange chamber (31), wherein at least one air inlet (32) and at least one air outlet (33) are formed in the heat exchange chamber (31), the second heat exchanger (14) is arranged in the heat exchange chamber (31), and the air inlet (32) and the air outlet (33) are respectively communicated with the external environment.
3. The thermal simulation system according to claim 2, wherein the first heat exchange system (i) further comprises a first heat exchanger (20) and a second heat exchange line (38), wherein an inlet end (44) of the second heat exchange line is connected to an outlet end of the first heat exchanger (20), an outlet end (45) of the second heat exchange line is connected to an inlet end of the first heat exchanger (20), and a third heat exchange medium in the second heat exchange line (38) exchanges heat with the refrigerant in the condenser when flowing in the second heat exchange line (38) and exchanges heat with the air in the external environment when flowing through the first heat exchanger (20).
4. A thermal simulation system according to claim 3, characterized in that said first heat exchange line (37) is provided with a first flow regulation means (23); and/or a second flow regulating component (26) is arranged on the second heat exchange pipeline (38).
5. A thermal simulation system according to claim 4, characterized in that the first flow regulating component (23) and/or the second flow regulating component (26) is a variable frequency pump.
6. A thermal simulation system according to claim 3, wherein the first heat exchange system (i) further comprises an auxiliary heat exchanger (30) arranged in parallel with the refrigeration unit (22), a first auxiliary heat exchange line (40) being provided on one side of the auxiliary heat exchanger (30), an inlet end (46) of the first auxiliary heat exchange line being connected to an inlet end (42) of the first heat exchange line, an outlet end (47) of the first auxiliary heat exchange line being connected to an outlet end (43) of the first heat exchange line; a second auxiliary heat exchange pipeline (41) is arranged on the other side of the auxiliary heat exchanger (30), an inlet end (48) of the second auxiliary heat exchange pipeline is connected with an outlet end (45) of the second heat exchange pipeline, and an outlet end (49) of the second auxiliary heat exchange pipeline is connected with an inlet end (44) of the second heat exchange pipeline.
7. A thermal simulation system according to claim 3, characterized in that said third heat exchange line (39) is provided with a third opening and closing valve (27); and/or a first opening and closing valve (25) is arranged on the first heat exchange pipeline (37).
8. The thermal simulation system of any one of claims 3-7, further comprising:
the first temperature detection device (28) is arranged at an environmental inlet where the component to be detected is positioned;
and the controller is connected with the first temperature detection device (28) and is used for controlling the first heat exchange system (I) or the second heat exchange system (II) to adjust the ambient temperature of the component to be detected according to the detection temperature value of the first temperature detection device (28).
9. Thermal simulation system according to claim 8, characterized in that when the temperature value T detected by said first temperature detection means (28) is greater than or equal to the external ambient temperature T0When the temperature of the part to be measured is higher than the set temperature, the controller controls the second heat exchange system (II) to adjust the ambient temperature of the part to be measured;
when the detected temperature value T of the first temperature detection device (28) is less than the external environment temperature T0And the controller controls the first heat exchange system (I) to adjust the ambient temperature of the component to be detected.
10. Thermal simulation system according to claim 8, characterized in that the temperature value of the heat exchange chamber (31) is T0；
When T is0-T<The temperature is 5 ℃ and is a first operation state, the controller controls the air inlet (32) and the air outlet (33) of the heat exchange chamber (31) to be completely opened, and the second heat exchanger (14) is in rated power operation;
when T is0-a second operating state when T is greater than or equal to 15 ℃, the controller controlling the number of the air inlets (32) and the air outlets (33) of the heat exchange chamber (31) to be opened to be smaller than the number of the air inlets and the air outlets to be opened in the first operating state, and the operating power of the second heat exchanger (14) to be smaller than the operating power in the first operating state;
when the temperature is less than or equal to 5 ℃ and T is less than or equal to0-T<The temperature is 15 ℃ and is a third operation state, the controller controls the opening number of the air inlet (32) and the air outlet (33) of the heat exchange chamber (31) to be smaller than that of the first operation stateThe number of openings in the row state and the operating power of the second heat exchanger (14) is equal to the operating power in the first operating state.
11. The thermal simulation system of claim 9,
when t is0-T>The temperature of the first heat exchange system is 10 ℃, the controller controls the refrigeration unit (22) to be started, the first flow regulating component (23) and the second flow regulating component (26) of the first heat exchange system are in rated power operation, and the first heat exchanger (20) is in rated power operation;
when t is less than or equal to 5 DEG C0-a fifth operating state when T is less than or equal to 10 ℃, the controller controlling the refrigeration unit (22) to be turned off, the auxiliary heat exchanger (30) of the first heat exchange system to be turned on, the operating power of the first flow regulating component (23) and the second flow regulating component (26) being less than the operating power in the fourth operating state, the operating power of the first heat exchanger (20) being less than the operating power in the fourth operating state;
when t is0-a sixth operating condition at T < 5 ℃, the controller controlling the refrigeration unit (22) to be switched off, the auxiliary heat exchanger (30) to be switched on, the operating power of the first flow regulating element (23) and of the second flow regulating element (26) being equal to the operating power in the fourth operating condition, the operating power of the first heat exchanger (20) being equal to the operating power in the fourth operating condition.
12. The thermal simulation system of any one of claims 1-7, wherein the component under test is a wind turbine generator set.
13. A device having a thermal simulation system, comprising a thermal simulation system according to any of claims 1-12.
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| CN110462206A (en) * | 2017-04-03 | 2019-11-15 | 西门子歌美飒可再生能源公司 | Wind turbine Waste Heat Recovery System |
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| CN101392729A (en) * | 2008-10-29 | 2009-03-25 | 南京航空航天大学 | Wind power generator cooled by solar injection |
| CN101705921A (en) * | 2009-12-01 | 2010-05-12 | 华北电力大学（保定） | Energy-saving engine room heat regulation system of high-power wind driven generator |
| CN110462206A (en) * | 2017-04-03 | 2019-11-15 | 西门子歌美飒可再生能源公司 | Wind turbine Waste Heat Recovery System |
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