CN113074093B - Wind generating set with heat pump self-deicing system and working method thereof - Google Patents
Wind generating set with heat pump self-deicing system and working method thereof Download PDFInfo
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- CN113074093B CN113074093B CN202110475093.3A CN202110475093A CN113074093B CN 113074093 B CN113074093 B CN 113074093B CN 202110475093 A CN202110475093 A CN 202110475093A CN 113074093 B CN113074093 B CN 113074093B
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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
- F03D80/40—Ice detection; De-icing means
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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
- F03D15/00—Transmission of mechanical power
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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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- 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
- F03D80/80—Arrangement of components within nacelles or towers
- F03D80/82—Arrangement of components within nacelles or towers of electrical components
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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
- F03D80/80—Arrangement of components within nacelles or towers
- F03D80/88—Arrangement of components within nacelles or towers of mechanical components
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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
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/22—Wind motors characterised by the driven apparatus the apparatus producing heat
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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
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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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
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/28—Wind motors characterised by the driven apparatus the apparatus being a pump or a compressor
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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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a wind generating set with a heat pump self-deicing system and a working method thereof, and belongs to the technical field of wind power generation. The blades are connected with a hub, the hub is connected with a low-speed shaft, the low-speed shaft is connected with a gear transmission system, and the gear transmission system is respectively connected with a generator high-speed shaft and a heat pump loop high-speed shaft; the generator high-speed shaft is connected with a generator, and a generator cooling heat exchanger is arranged in the generator; the high-speed shaft of the heat pump loop is connected with the compressor of the heat pump circulation loop; the blade deicing circulation loop is provided with a heater and a deicing fan and is communicated with the blade deicing device; the blade is provided with a blade tip thermometer; the heat pump circulation loop exchanges heat with the blade deicing circulation loop in the blade deicing heat exchanger, and the heat pump circulation loop exchanges heat with the external cooling loop in the generator cooling heat exchanger. The invention can improve the overall energy utilization rate of the wind generating set, improves the generating efficiency of the wind generating set and has good application prospect.
Description
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to a wind generating set with a heat pump self-deicing system and a working method thereof.
Background
Wind power generation is a low-carbon near-zero emission power generation mode, and can convert wind energy into electric energy, so that clean and renewable power is provided for a power grid. The wind generating set captures wind energy through the blades and is connected with the generator through the transmission mechanism to convert mechanical energy into electric energy.
In the actual running process of the fan, a plurality of problems are faced. When the air temperature is low in winter, the blades are easy to freeze, and a heat source is needed to be provided in time for deicing; when the fan is in operation, the temperature of the cabin interior, the generator and the like is higher, and a cold source is required to be provided for cooling the cabin interior. In general, both fan blade de-icing and generator cooling are achieved by the introduction of external energy, which in large part results in energy losses.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a wind generating set with a heat pump self-deicing system and a working method thereof, which can improve the overall energy utilization rate of the wind generating set and the power generation efficiency of the wind generating set.
The invention is realized by the following technical scheme:
the invention discloses a wind generating set with a heat pump self-deicing system, which comprises blades, a hub, a cabin, a low-speed shaft, a generator high-speed shaft, a gear transmission system, a heat pump loop high-speed shaft, a heat pump circulation loop, a blade deicing heat exchanger, a generator cooling heat exchanger, a blade deicing circulation loop, a blade deicing device and an external cooling loop;
the blades are connected with the hub, the hub is connected with the low-speed shaft, the low-speed shaft is connected with the gear transmission system, and two output ends of the gear transmission system are respectively connected with the high-speed shaft of the generator and the high-speed shaft of the heat pump loop; the generator high-speed shaft is connected with a generator, and a generator cooling heat exchanger is arranged in the generator; the heat pump circulation loop comprises a compressor, and a high-speed shaft of the heat pump loop is connected with the compressor; the blade deicing device is arranged inside the blade; the blade deicing circulation loop is provided with a heater and a deicing fan and is communicated with the blade deicing device; the blade is provided with a blade tip thermometer; the heat pump circulation loop exchanges heat with the blade deicing circulation loop in the blade deicing heat exchanger, and the heat pump circulation loop exchanges heat with the external cooling loop in the generator cooling heat exchanger.
Preferably, the gear transmission system comprises a first gear, a second gear and a third gear set, wherein the first gear is meshed with the second gear and the third gear set respectively, the second gear is connected with the high-speed shaft of the heat pump loop, and the third gear set is connected with the high-speed shaft of the generator.
Preferably, the heat pump cycle further comprises an expansion valve, a condenser connected to the hot side of the blade deicing heat exchanger, and an evaporator provided inside the generator and connected to the hot side of the generator cooling heat exchanger.
Preferably, the inlet and the outlet of the external cooling loop are arranged outside the engine room, the external cooling loop is connected with the cold side of the generator cooling heat exchanger, and the external cooling loop is provided with a control valve and a generator cooling fan.
Preferably, the blade deicing circulation loop is connected with the blade deicing device through a rotary joint, and the rotary joint is arranged inside the hub.
Preferably, the blade de-icing device is a number of heat sinks connected in series.
Preferably, the blade deicing device is an elbow pipe which is arranged inside the blade in a roundabout way.
It is further preferred that the bent pipe is arranged at the leading edge of the blade at a higher density than the trailing edge of the blade.
The working method of the wind generating set with the heat pump self-deicing system disclosed by the invention comprises the following steps:
the blades capture wind energy, the low-speed shaft is driven to rotate by the rotation of the hub, the low-speed shaft drives the generator high-speed shaft to rotate by the gear transmission system, and the generator high-speed shaft drives the generator to generate electricity;
when the ambient temperature is higher than the ice condensation point, the heat pump circulation loop does not work, and the high-speed shaft of the heat pump loop is separated from the gear transmission system; the generator is cooled by an external cooling loop;
when the ambient temperature is lower than the ice condensation point, the high-speed shaft of the heat pump loop is connected to the gear transmission system, and the heat pump loop starts to work; the deicing airflow in the blade deicing circulation loop exchanges heat with a medium in the heat pump circulation loop in the blade deicing heat exchanger, and after the temperature of the deicing airflow is increased, the deicing airflow enters a blade deicing device in the blade to heat and deicing the blade;
the blade tip thermometer measures the temperature of the blade tip in real time and feeds back the temperature to the heat pump circulation loop, the load of the compressor is regulated, and the output force of the compressor is gradually increased until the temperature of the blade tip is higher than a preset temperature;
when the compressor runs at the maximum power, if the temperature of the tip of the blade is still lower than the freezing point, starting a heater to carry out auxiliary heating on deicing airflow until the temperature measured by the blade tip thermometer is higher than a preset temperature;
when the compressor runs at the maximum power, if the generator cooling does not reach the cooling effect, an external cooling loop is started to perform auxiliary cooling until the temperature of the internal circulating air flow of the generator meets the requirement.
Preferably, the preset temperature is the ice condensation point +3 ℃, and the maximum power of the compressor is not more than 5% of the rated power of the wind generating set.
Compared with the prior art, the invention has the following beneficial technical effects:
the wind generating set with the self-deicing system for the heat pump disclosed by the invention is based on the principle of the heat pump, fully utilizes the energy of the fan, deicing the blades and realizing the reasonable distribution of the energy in the fan. The wind wheel is connected with the gear transmission system through the low-speed shaft, and the high-speed shaft of the generator is connected with the generator to form a basic power generation structure of the wind generating set. The cooling of the generator consists of two paths, wherein one path is a conventional external cooling loop, namely, cold air is introduced from the atmosphere to exchange heat with the internal circulating working medium of the generator, so that heat generated by the generator is taken away; the other path is a heat pump circulation loop, the power of the loop is derived from the mechanical energy of the wind wheel, a transmission branch is newly added on the basis of the original gear transmission system, and the high-speed shaft of the heat pump loop drives the compressor to apply work so as to compress the heat pump medium. The heat pump medium exchanges heat with deicing airflow in the blade deicing circulation loop in the blade deicing heat exchanger to heat the deicing airflow. The deicing airflow subjected to heat exchange enters a blade deicing device in a blade to perform heat exchange deicing with the blade, and the heat pump medium subjected to heat exchange enters a generator to perform heat exchange, so that heat generated in the running process of the generator is absorbed; after the heat exchange inside the generator, the heat is sent to the compressor again, so that the circulation of the heat pump is realized. The heat pump circulation loop and the external cooling loop form a complementary relationship: when the external ambient temperature is higher and the blade does not have icing, the heat pump circulation loop is not started, and only the external cooling loop is started, so that external cold air is introduced to cool the generator. When the blade has icing trend or icing condition, the heat pump circulation loop is started, absorbs heat from the generator side, and transfers the heat to the fan blade for deicing; if the heat transferred by the heat pump circulation loop can not completely remove the ice coating on the blades, starting a heater, introducing external energy, and compensating the heat of deicing airflow; if the heat pump cycle does not absorb enough heat from the generator side to cool the generator to a normal operating level, the external cooling circuit is activated until the cooling of the generator is satisfactory. The system realizes the gradient utilization of energy in the wind generating set. The compressor is driven by the mechanical energy of the wind wheel system, so that the introduction of an additional power source is avoided. The heat pump circulation loop redistributes heat, so that cooling of the generator and deicing of blades are realized, energy consumption of the system is greatly reduced, and the heat pump circulation loop has good application prospect.
Further, the blade deicing device is a plurality of radiators connected in series, and the radiators can be arranged at the positions where icing is easy to occur according to actual conditions, so that the heating efficiency is high and the arrangement is flexible.
Further, the blade deicing device is an elbow pipe which is circuitously arranged in the blade, can be attached to the shape in the blade to be arranged, and has good heating effect and low energy consumption.
Furthermore, the arrangement density of the bent pipe at the front edge of the blade is larger than that of the bent pipe at the rear edge of the blade, and because the front edge of the blade generally first generates ice condensation, the heating effect of the front edge of the blade and the rear edge of the blade can be close, the temperature inside the blade is balanced, and larger thermal stress is avoided.
According to the working method of the wind generating set with the heat pump self-deicing system, disclosed by the invention, the internal energy can be allocated according to the actual working condition, the degree of automation is high, the energy utilization rate is high, and the energy consumption of the system is reduced.
Further, the maximum power of the compressor is not more than 5% of the rated power of the wind generating set, so that the whole output of the wind generating set is prevented from being greatly influenced.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a wind power generation set with a heat pump self-deicing system according to the present invention.
In the figure, 1-leaf; 2-a hub; 3-nacelle; 4-low speed shaft; 5-generator high speed shaft; 6-a first gear; 7-a second gear; 8-a high-speed shaft of a heat pump loop; 9-a compressor; 10-blade deicing heat exchanger; 11-an expansion valve; 12-generator cooling heat exchanger; 13-a generator cooling fan; 14-a heater; 15-a rotary joint; 16-blade de-icing device; 17-deicing fans; 18-tip thermometer.
Detailed Description
The structure and operation of the present invention are described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the wind generating set with the self-deicing system for the heat pump of the present invention comprises a blade 1, a hub 2, a nacelle 3, a low-speed shaft 4, a generator high-speed shaft 5, a gear transmission system, a heat pump circuit high-speed shaft 8, a heat pump circulation circuit, a blade deicing heat exchanger 10, a generator cooling heat exchanger 12, a blade deicing circulation circuit, a blade deicing device 16 and an external cooling circuit.
The blade 1 is connected with the hub 2, the hub 2 is connected with the low-speed shaft 4, the low-speed shaft 4 is connected with a gear transmission system, and two output ends of the gear transmission system are respectively connected with the generator high-speed shaft 5 and the heat pump loop high-speed shaft 8; the generator high-speed shaft 5 is connected with a generator, and a generator cooling heat exchanger 12 is arranged in the generator; the heat pump circulation loop comprises a compressor 9, and a heat pump loop high-speed shaft 8 is connected with the compressor 9; the blade deicing device 16 is arranged inside the blade; the blade deicing circulation loop is provided with a heater 14 and a deicing fan 17 and is communicated with the blade deicing device 16; the blade 1 is provided with a blade tip thermometer 18; the heat pump cycle exchanges heat with the blade deicing cycle in the blade deicing heat exchanger 10 and the heat pump cycle exchanges heat with the external cooling circuit in the generator cooling heat exchanger 12.
In one embodiment of the invention, the gear train comprises a first gear 6, a second gear 7 and a third gear set, the first gear 6 being in mesh with the second gear 7 and the third gear set, respectively, the second gear (7) being connected to the heat pump circuit high speed shaft 8, the third gear set being connected to the generator high speed shaft 5.
In one embodiment of the invention, the heat pump cycle further comprises an expansion valve 11, a condenser connected to the hot side of the blade deicing heat exchanger 10, and an evaporator provided inside the generator and connected to the hot side of the generator cooling heat exchanger 12.
In one embodiment of the invention, both the inlet and the outlet of the external cooling circuit are provided outside the nacelle 3, the external cooling circuit being connected to the cold side of the generator cooling heat exchanger 12, the external cooling circuit being provided with a control valve and a generator cooling fan 13.
In one embodiment of the invention, the blade de-icing cycle is connected to the blade de-icing assembly 16 via a rotary joint 15, the rotary joint 15 being arranged inside the hub 2.
In one embodiment of the invention, blade de-icing assembly 16 is a plurality of heat sinks connected in series. According to practical experience, a plurality of radiators can be arranged at the position where icing is easy to occur
In a preferred embodiment of the present invention, blade deicing device 16 is a curved tube, either a serpentine tube or a square tube, that is circuitously disposed within the blade. Preferably, the bent pipe is arranged at the leading edge of the blade at a higher density than the trailing edge of the blade.
In a preferred embodiment of the present invention, both the blade deicing heat exchanger 10 and the generator cooling heat exchanger 12 are gas-gas phase heat exchangers, which are highly efficient.
The working method of the wind generating set with the heat pump self-deicing system comprises the following steps:
the blades 1 capture wind energy, the low-speed shaft 4 is driven to rotate through the rotation of the hub 2, the low-speed shaft 4 drives the third gear set to rotate through the first gear 6, the third gear set drives the generator high-speed shaft 5 to rotate, and the generator high-speed shaft 5 drives the generator to generate electricity;
when the ambient temperature is higher than the freezing point (generally 3 ℃), the heat pump circulation loop does not work, and the second gear 7 connected with the high-speed shaft 8 of the heat pump loop is not meshed with the first gear 6; the generator is cooled by an external cooling loop;
when the ambient temperature is lower than the freezing point, the second gear 7 is meshed with the first gear 6, and the high-speed shaft 8 of the heat pump loop is connected into a gear transmission system to drive the compressor 9 to do work. The compressor 9 compresses the heat pump medium, which is pressurized, releasing heat, completing the heat exchange in the blade de-icing heat exchanger 10, transferring the heat to the de-icing air flow in the blade de-icing cycle. The heat pump medium after heat exchange is reduced in temperature, enters the expansion valve 11, increases in volume, flows through the generator cooling heat exchanger 12 after the temperature is further reduced, absorbs heat of circulating air flow in the generator, cools the generator and then flows into the compressor 9 again, and therefore a heat pump cycle is formed. The deicing airflow exchanges heat with a medium in a heat pump circulation loop in the blade deicing heat exchanger 10, and after the temperature of the deicing airflow is increased, the deicing airflow enters a blade deicing device 16 in the blade 1 through a rotary joint 15 to heat and deicing the blade 1;
the blade tip thermometer 18 measures the temperature of the tip of the blade 1 in real time and feeds back the temperature to the heat pump circulation loop, the load of the compressor 9 is regulated, and the output force of the compressor 9 is gradually increased until the temperature of the tip of the blade 1 is higher than the freezing point by 3 ℃;
when the compressor 9 is operated at the maximum power, if the temperature of the tip of the blade 1 is still lower than the freezing point, the heater 14 is started to carry out auxiliary heating on deicing airflow until the temperature measured by the blade tip thermometer 18 is higher than the freezing point by 3 ℃;
when the compressor 9 is operated at the maximum power, if the generator cooling does not reach the cooling effect, an external cooling loop is started to perform auxiliary cooling until the temperature of the internal circulating air flow of the generator meets the requirement.
Typically, the maximum power of the compressor is no more than 5% of the rated power of the wind turbine.
The above description is only illustrative of the preferred embodiments of the invention and the technical principles employed. Meanwhile, the scope of the invention is not limited to the technical scheme formed by the specific combination of the technical features, and other technical schemes formed by any combination of the technical features or the equivalent features thereof without departing from the inventive concept are also covered. Such as the above-mentioned features and the technical features disclosed in the present invention (but not limited to) having similar functions are replaced with each other.
Claims (9)
1. The working method of the wind generating set with the heat pump self-deicing system is characterized in that the wind generating set comprises blades (1), a hub (2), a cabin (3), a low-speed shaft (4), a generator high-speed shaft (5), a gear transmission system, a heat pump loop high-speed shaft (8), a heat pump loop, a blade deicing heat exchanger (10), a generator cooling heat exchanger (12), a blade deicing loop, a blade deicing device (16) and an external cooling loop;
the blade (1) is connected with the hub (2), the hub (2) is connected with the low-speed shaft (4), the low-speed shaft (4) is connected with the gear transmission system, and two output ends of the gear transmission system are respectively connected with the generator high-speed shaft (5) and the heat pump loop high-speed shaft (8); the generator high-speed shaft (5) is connected with a generator, and a generator cooling heat exchanger (12) is arranged in the generator; the heat pump circulation loop comprises a compressor (9), and a heat pump loop high-speed shaft (8) is connected with the compressor (9); the blade deicing device (16) is arranged inside the blade; the blade deicing circulation loop is provided with a heater (14) and a deicing fan (17), and is communicated with the blade deicing device (16); a blade tip thermometer (18) is arranged on the blade (1); the heat pump circulation loop exchanges heat with the blade deicing circulation loop in the blade deicing heat exchanger (10), and the heat pump circulation loop exchanges heat with the external cooling loop in the generator cooling heat exchanger (12);
the working method comprises the following steps:
the blades (1) capture wind energy, the low-speed shaft (4) is driven to rotate through the rotation of the hub (2), the low-speed shaft (4) drives the generator high-speed shaft (5) to rotate through the gear transmission system, and the generator high-speed shaft (5) drives the generator to generate electricity;
when the ambient temperature is higher than the ice condensation point, the heat pump circulation loop does not work, and the high-speed shaft (8) of the heat pump loop is separated from the gear transmission system; the generator is cooled by an external cooling loop;
when the ambient temperature is lower than the ice condensation point, a high-speed shaft (8) of the heat pump loop is connected to the gear transmission system, and the heat pump loop starts to work; the deicing airflow in the blade deicing circulation loop exchanges heat with a medium in the heat pump circulation loop in the blade deicing heat exchanger (10), and the deicing airflow enters the blade deicing device (16) in the blade (1) after the temperature of the deicing airflow is increased to heat and deicing the blade (1);
the blade tip thermometer (18) measures the temperature of the tip of the blade (1) in real time and feeds back the temperature to the heat pump circulation loop, the load of the compressor (9) is regulated, and the output force of the compressor (9) is gradually increased until the temperature of the tip of the blade (1) is higher than a preset temperature;
when the compressor (9) operates at the maximum power, if the temperature of the tip of the blade (1) is still lower than the freezing point, starting the heater (14) to carry out auxiliary heating on deicing airflow until the temperature measured by the blade tip thermometer (18) is higher than the preset temperature;
when the compressor (9) operates at the maximum power, if the generator cooling does not reach the cooling effect, an external cooling loop is started to perform auxiliary cooling until the temperature of the internal circulating airflow of the generator meets the requirement.
2. Method for operating a wind power plant with a self-deicing system for heat pumps according to claim 1, characterized in that the gear train comprises a first gear (6), a second gear (7) and a third gear set, the first gear (6) being in mesh with the second gear (7) and the third gear set, respectively, the second gear (7) being connected to the heat pump circuit high-speed shaft (8), the third gear set being connected to the generator high-speed shaft (5).
3. Method for operating a wind power plant with a self-deicing system of a heat pump according to claim 1, characterized in that the heat pump cycle further comprises an expansion valve (11), a condenser and an evaporator, the condenser being connected to the hot side of the blade deicing heat exchanger (10), the evaporator being arranged inside the generator and being connected to the hot side of the generator cooling heat exchanger (12).
4. Method for operating a wind power plant with a self-deicing system for heat pumps according to claim 1, characterized in that the inlet and the outlet of the external cooling circuit are both provided outside the nacelle (3), the external cooling circuit is connected to the cold side of the generator cooling heat exchanger (12), and the external cooling circuit is provided with a control valve and a generator cooling fan (13).
5. Method for operating a wind power plant with a self-deicing system of a heat pump according to claim 1, characterized in that the blade deicing circulation circuit is connected to the blade deicing device (16) by means of a rotary joint (15), the rotary joint (15) being arranged inside the hub (2).
6. Method of operating a wind power plant with a heat pump self-deicing system according to claim 1, characterized in that the blade deicing means (16) are several radiators connected in series.
7. Method for operating a wind power plant with a self-deicing system of heat pump according to claim 1, characterized in that the blade deicing means (16) are elbows which are roundabout arranged inside the blades.
8. A method of operating a wind power plant with a heat pump self-deicing system according to claim 7, characterized in that the bent pipe is arranged at a higher density at the leading edge of the blade than at the trailing edge of the blade.
9. The method of claim 1, wherein the predetermined temperature is a condensation point +3deg.C, and the maximum power of the compressor is not more than 5% of the rated power of the wind turbine.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475093.3A CN113074093B (en) | 2021-04-29 | 2021-04-29 | Wind generating set with heat pump self-deicing system and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475093.3A CN113074093B (en) | 2021-04-29 | 2021-04-29 | Wind generating set with heat pump self-deicing system and working method thereof |
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| CN113074093A CN113074093A (en) | 2021-07-06 |
| CN113074093B true CN113074093B (en) | 2024-02-23 |
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| CN113775490B (en) * | 2021-09-28 | 2023-04-18 | 中国船舶重工集团海装风电股份有限公司 | Design method of centralized water cooling system of wind generating set |
| CN118423240B (en) * | 2024-04-08 | 2024-10-29 | 江苏斯维尔建筑设计院有限公司 | Deicing device and deicing method for bionic fan blade of energy pile |
| CN118959253B (en) * | 2024-10-14 | 2025-01-28 | 大唐景泰风电有限责任公司 | Antifreeze wind turbine blade |
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