CN220599941U - Offshore wind turbine blade frost prevention and removal system utilizing waste heat and micro-channel technology - Google Patents
Offshore wind turbine blade frost prevention and removal system utilizing waste heat and micro-channel technology Download PDFInfo
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- CN220599941U CN220599941U CN202320797117.1U CN202320797117U CN220599941U CN 220599941 U CN220599941 U CN 220599941U CN 202320797117 U CN202320797117 U CN 202320797117U CN 220599941 U CN220599941 U CN 220599941U
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- wind turbine
- temperature
- electric heater
- heat
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- 239000002918 waste heat Substances 0.000 title claims abstract description 17
- 238000005516 engineering process Methods 0.000 title claims abstract description 13
- 230000002265 prevention Effects 0.000 title claims abstract description 9
- 230000000694 effects Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000005485 electric heating Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Classifications
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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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- Wind Motors (AREA)
Abstract
The utility model discloses an offshore wind turbine blade frost prevention and removal system utilizing waste heat and micro-channel technology. The system comprises: the device comprises a fan cabin, a blower, a feedback controller, an electric heater, a hub and a microchannel heat exchanger. The air feeder is used for collecting heat source air in the fan cabin and providing power for the heat source air to pass through the electric heater; the electric heater can control the switch according to the temperature of the heat source air, so that the air temperature can meet the requirement of removing the frost; air then enters the micro-channels from the hub and exits from the hub after heating the blade. The utility model ensures that the temperature of the wind cabin is normal, simultaneously makes full use of heat energy, reduces the waste of resources and prolongs the service life of the offshore wind turbine.
Description
Technical Field
The utility model relates to the field of waste heat recovery of offshore wind turbines, in particular to an offshore wind turbine blade frost prevention and removal system utilizing waste heat and micro-channel technology.
Background
Offshore wind power is a new field of renewable energy development and is also an important direction of wind power development. The wind power generation system has a large development space, so that the development significance of the offshore wind power is promoted. During operation, many parts of the wind generating set can generate heat, and the parts mainly generating heat comprise a gear box, a generator and the like. This heat can lead to an increase in the temperature inside the nacelle, which can affect the safe operation of the electronic components, which heat needs to be discharged in time.
Secondly, the temperature is low in the sea in winter, the humidity is high, the fan blade is easy to generate icing, a large ice load can be generated after the fan blade is frozen, the service life of the blade is influenced, and meanwhile, the machine set is greatly damaged, such as blade breakage, machine set collapse and the like. If the icing fan stops running, the utilization rate of the wind turbine generator set in a low-temperature area for a long time is reduced. And after the fan blade freezes, because of icing thickness difference leads to original wing section to change, can influence wind turbine generator system's load, the generating efficiency of fan tends to reduce. The traditional solution is to provide an electric heating element at the icing position of the blade, but the electric heating element is only used for heating the blade, so that the power consumption of the wind turbine generator can be increased, and the load of the blade can be increased due to excessive electric heating elements.
Disclosure of Invention
The utility model aims to provide an offshore wind turbine blade frost prevention and removal system utilizing waste heat and micro-channel technology. Aiming at the characteristics of the wind turbine, the utility model uses the blower to quickly collect the waste heat generated by the heating components such as the gear box, the generator and the like in the fan cabin, uses the heat source air for preventing and removing frost by the heating blades, reasonably utilizes the part of the waste heat while ensuring the normal temperature of the fan cabin, reduces the waste of resources, fully utilizes the heat energy and prolongs the service life of the offshore wind turbine.
In order to achieve the above effects, the technical scheme adopted by the utility model is as follows:
an offshore wind turbine blade frost prevention and removal system utilizing waste heat and micro-channel technology comprises a wind turbine cabin (1), a blower (2), a feedback control device (3), an electric heater (4), a hub (5) and a micro-channel heat exchanger (6), wherein the blower (2) is used for collecting heat source air of a generator and a gear box in the wind turbine cabin (1) and supplying power to pass through the electric heater (4), and then the heat source air enters the micro-channel heat exchanger (6) from the hub (5) to heat the blade, and the air after the blade is heated is discharged to the outside from the hub (5). The feedback control device (3) can regulate and control the power of the blower (2) according to the temperature of the generator and the gear box in the wind turbine cabin (1), and ensure that the temperature of the generator and the gear box is at a normal level. The electric heater (4) can control the switch according to the temperature of heat source air provided by the blower (2), so that the air temperature entering the micro-channel heat exchanger (6) can meet the requirement of defrosting.
Preferably, the system is required to ensure that the temperature of the generator and gearbox within the nacelle (1) is at a normal level. And a feedback control device (3) capable of controlling the power of the blower (2) according to the temperatures of the generator and the gear box. When the temperature of the generator is higher than 70 ℃ or the temperature of the gear box is higher than 80 ℃, the feedback control device (3) transmits a signal to the air feeder (2) to increase the power, increase the air flow and reduce the temperature in the fan cabin (1).
Preferably, the heat exchanger below the blade adopts a fractal crotch micro-channel heat exchanger, and the number of branches is reduced along with the reduction of the width of the blade.
Preferably, the temperature of the air entering the microchannel heat exchanger (6) is required to meet the need for frost control. The electric heater (4) can be controlled to be switched on and off according to the temperature of the heat source air provided by the blower (2), and when the temperature of the heat source air is higher than 65 ℃, the electric heater is switched off; when the heat source air temperature is lower than 65 ℃, the electric heater is turned on.
Furthermore, the temperature control in the electric heater (4) adopts intermittent part-way control, and an insensitive area is arranged at the junction of the switching signals of the electric heater (4) to prevent the frequent switching of the electric heater when the air temperature is slightly changed near a given value, so that the system is more stable.
The gain effect of the utility model:
(1) According to the utility model, the waste heat of the heating elements such as the gearbox and the generator of the marine wind power generator cabin is rapidly led out, so that the temperature in the cabin is effectively reduced, and the safe operation of the wind power generator set is ensured.
(2) The utility model transmits the residual heat in the fan cabin to the position where the blades are easy to freeze and frost to achieve the purpose of preventing and removing frost, and simultaneously achieves the purpose of saving energy and reducing heat loss.
(3) The heat exchange part under the blade of the utility model adopts a fractal crotch micro-channel heat exchanger, the number of the micro-channel crotch is reduced along with the reduction of the width of the blade, and the micro-channel heat exchanger improves the heat transfer rate by increasing the contact area of the fluid and the flow channel.
(4) The electric heater can control the switch according to the temperature of the heat source air, and can not only ensure that the temperature of the air entering the microchannel heat exchanger meets the frost prevention and removal requirement, but also consume no more electric energy.
(5) The temperature control of the electric heater adopts intermittent part-way control, and an insensitive area is arranged at the junction of the switching signals of the electric heater, so that the electric heater is prevented from being frequently switched on and off when the air temperature is slightly changed near a given value, the system is more stable, and the service life of the system is prolonged.
Drawings
FIG. 1 is a diagram of an offshore wind turbine blade frost removal system utilizing waste heat and microchannel technology.
FIG. 2 is a layout of micro-channels at a fan blade.
1. A wind turbine nacelle; 2. a blower; 3. feedback control means; 4. an electric heater; 5. a hub; 6. a microchannel heat exchanger; 6-1 microchannel inlet; 6-2 microchannel outlets;
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in the figure, the utility model provides an offshore wind turbine blade frost prevention and removal system utilizing waste heat and micro-channel technology, which consists of a wind turbine cabin (1), a blower (2), a feedback control device (3), an electric heater (4), a hub (5) and a micro-channel (6). The blower (2) collects heat source air in the blower cabin (1) through the electric heater (4) by the generator and the gear box, then the heat source air enters the micro-channel heat exchanger (6) from the micro-channel inlet (6-1) at the hub (5) to heat the blades, and the heat source air is discharged from the micro-channel outlet (6-2) at the hub (5) after being heated.
The feedback control device (3) can control the power of the air blower (2) according to the temperature of the generator and the gearbox in the wind turbine cabin (1) so as to ensure that the temperature in the wind turbine cabin (1) is at a normal level, and when the temperature of the generator is higher than 70 ℃ or the temperature of the gearbox is higher than 80 ℃, the feedback control device (3) transmits signals to the air blower (2) to improve the power of the air blower (2), increase the air flow and reduce the temperature in the wind turbine cabin (1).
The electric heater (4) can be controlled to be switched on and off by the temperature of the heat source air provided by the blower (2), and when the temperature of the heat source air is higher than 65 ℃, the electric heater is switched off; when the temperature of the air of the heat source is lower than 65 ℃, the electric heater is turned on, so that the temperature of the air entering the micro-channel heat exchanger (6) can meet the requirements of preventing and removing frost.
The foregoing description is only of the preferred embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art should be able to apply the equivalent changes or substitutions to the technical solution and the inventive concept according to the technical scope and design concept disclosed in the present utility model.
Claims (5)
1. An offshore wind turbine blade frost prevention and removal system utilizing waste heat and micro-channel technology, which is characterized in that: the whole system consists of a fan cabin (1), a blower (2), a feedback control device (3), an electric heater (4), a hub (5) and a micro-channel heat exchanger (6), wherein the blower (2) collects heat source air in the fan cabin (1) from a generator and a gear box and provides power to pass through the electric heater (4), and then the heat source air enters the micro-channel heat exchanger (6) to heat the blades.
2. An offshore wind turbine blade frost control system utilizing waste heat and micro-channel technology as defined in claim 1, wherein: the feedback control device (3) can control the air quantity through the power of the temperature regulation blower (2) of the generator and the gear box inside the blower cabin (1), thereby achieving the effect of reducing the temperature of the blower cabin.
3. An offshore wind turbine blade frost control system utilizing waste heat and micro-channel technology as defined in claim 1, wherein: the fractal crotch micro-channel heat exchanger is adopted, and the purpose of enhancing heat transfer is achieved by increasing the contact area of fluid and a flow channel.
4. An offshore wind turbine blade frost control system utilizing waste heat and micro-channel technology as defined in claim 1, wherein: the electric heater (4) can control the switch through the temperature of the heat source air provided by the blower (2) to enable the air temperature to meet the requirement of removing the frost.
5. An offshore wind turbine blade frost control system utilizing waste heat and micro-channel technology as defined in claim 4, wherein: the temperature control in the electric heater (4) adopts intermittent part-way control, and an insensitive area is arranged at the junction of the switching signals of the electric heater (4), so that the system is more stable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320797117.1U CN220599941U (en) | 2023-04-12 | 2023-04-12 | Offshore wind turbine blade frost prevention and removal system utilizing waste heat and micro-channel technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320797117.1U CN220599941U (en) | 2023-04-12 | 2023-04-12 | Offshore wind turbine blade frost prevention and removal system utilizing waste heat and micro-channel technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220599941U true CN220599941U (en) | 2024-03-15 |
Family
ID=90173364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320797117.1U Active CN220599941U (en) | 2023-04-12 | 2023-04-12 | Offshore wind turbine blade frost prevention and removal system utilizing waste heat and micro-channel technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220599941U (en) |
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2023
- 2023-04-12 CN CN202320797117.1U patent/CN220599941U/en active Active
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