Wind turbine cooling system and wind turbine
By employing a phase change medium single-channel cooling system in the wind turbine, with the condenser located outside the nacelle and the evaporator inside, and utilizing gravity and natural wind for self-driven heat dissipation, the problems of high cost and large space occupation of existing systems are solved, and the stability and adaptability of the system are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUANJIAN WIND POWER JIANGYINENVISION ENERGY CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-07-14
AI Technical Summary
Existing wind turbine cooling systems are costly and space-consuming, making them difficult to adapt to the development needs of large capacity and high power density, and there is a risk of system failure caused by power component failure.
A phase change medium single-channel cooling system is adopted, with the condenser installed on the outside of the engine compartment and the evaporator installed inside the engine compartment. A self-driven heat dissipation cycle is formed through connecting pipes, and heat exchange is carried out by gravity and natural wind, reducing reliance on power equipment.
It reduces manufacturing costs and equipment space requirements, improves the stability and reliability of heat dissipation circulation, adapts to the development needs of large capacity and high power density, and reduces the burden of operation and maintenance.
Smart Images
Figure CN224496649U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of wind turbines, and in particular to a wind turbine cooling system and a wind turbine. Background Technology
[0002] As wind power technology develops towards larger capacity and higher power density, the core components of wind turbine generators, such as generators, gearboxes, and frequency converters, generate a large amount of heat during operation. If heat cannot be dissipated in a timely and effective manner, the equipment temperature will rise, reducing system efficiency and lifespan.
[0003] In the existing technology, water cooling systems are usually used to dissipate heat from the above-mentioned heat source components. However, since this system requires a large number of components such as water pumps, valves, and heaters, and requires the construction of complex circulation pipe networks and supports, it not only results in high equipment costs, but also occupies a large space. Utility Model Content
[0004] The purpose of this application is to provide a wind turbine heat dissipation system and a wind turbine, which can reduce the manufacturing cost of the heat dissipation system and also reduce the space occupied by the heat dissipation system.
[0005] In a first aspect, this utility model provides a wind turbine heat dissipation system, comprising:
[0006] A condenser is located outside the nacelle of the wind turbine, and the condenser has a cavity for containing refrigerant.
[0007] An evaporator is located inside the engine compartment and is positioned corresponding to the heat source components. The evaporator is located below the condenser. The evaporator has an evaporation chamber inside, which is connected to the receiving cavity through a connecting pipe to form a heat dissipation cycle.
[0008] During the heat dissipation cycle, the condenser condenses the gaseous refrigerant into a liquid refrigerant, and the liquid refrigerant is transported to the evaporation chamber through the connecting pipe; the liquid refrigerant in the evaporation chamber absorbs heat from the heat source component and vaporizes into a gaseous refrigerant, which then flows back to the receiving chamber through the connecting pipe.
[0009] Beneficial effects: In this wind turbine cooling system, the condenser is installed on the outside of the wind turbine nacelle, and the evaporator is installed inside the nacelle. The heat source components of the evaporator are set up, and the evaporation chamber of the evaporator and the receiving chamber of the condenser are connected by connecting pipes.
[0010] During the heat dissipation cycle, because the condenser is located outside the engine compartment, it can directly exchange heat with the external environment, accelerating refrigerant condensation and causing the gaseous refrigerant in the containment chamber to condense into liquid refrigerant. By placing the condenser above the evaporator, the liquid refrigerant can flow naturally to the evaporator through the connecting pipes under the influence of gravity, eliminating the need for power equipment such as water pumps. This saves energy and reduces the risk of system failure due to power component malfunctions, significantly improving the stability and reliability of the heat dissipation cycle. The liquid refrigerant in the evaporator absorbs heat from the heat source components, dissipating heat for them. In this process, the liquid refrigerant vaporizes into gaseous refrigerant, which can then flow back to the condenser's containment chamber through the connecting pipes, achieving a self-driven heat dissipation cycle within a single channel.
[0011] Compared to existing water-cooling systems, this system does not require a large number of components such as water pumps, valves, and heaters, nor does it require the construction of complex pipe network supports. This significantly reduces the number of parts and system redundancy, which not only lowers manufacturing costs but also reduces the space occupied by the equipment. It is better suited to the needs of wind turbine generator sets to develop towards larger capacity and higher power density. At the same time, the simplified structure also reduces the burden of later operation and maintenance.
[0012] In one optional embodiment, multiple evaporators are provided, and the multiple evaporators are configured to correspond to multiple heat source components;
[0013] The connecting pipeline includes a main pipe and multiple branch pipes. One end of the main pipe is connected to the receiving cavity, and the other end is connected to one end of each of the multiple branch pipes. Each of the multiple branch pipes is arranged in a one-to-one correspondence with a multiple of the evaporators, and the other end of each branch pipe is connected to the evaporation cavity of the corresponding evaporator.
[0014] Beneficial effects: Multiple evaporators are configured one-to-one with multiple heat source components in the nacelle (such as generators, gearboxes, frequency converters, etc.), allowing for direct, close-range heat absorption of each core heat-generating component. This ensures efficient cooling of each heat source component, improving the overall system's heat dissipation effect on the unit's core components and avoiding the uneven heat distribution problem that occurs when a single evaporator dissipates heat from multiple heat source components. The evaporation rate can dynamically match the heat output of the core components, eliminating the need for temperature-controlled three-way valves, water pumps, heaters, etc., required for dynamic temperature control in water-cooled systems.
[0015] In one optional embodiment, the wind turbine cooling system further includes a diversion valve, and each of the branch pipes is connected to the main pipe through the diversion valve. The diversion valve is used to distribute the liquid refrigerant condensed by the condenser to each of the branch pipes according to a preset ratio.
[0016] Beneficial effects: Since the heating power and real-time temperature of multiple heat source components in a wind turbine often differ, a distribution valve can be installed to precisely allocate liquid refrigerant according to a preset ratio: the branch pipe corresponding to the heat source component with high heat generation receives more refrigerant, ensuring its evaporator has sufficient liquid refrigerant for vaporization and heat absorption; the heat source component with low heat generation receives less refrigerant, avoiding waste.
[0017] In one optional embodiment, the wind turbine cooling system further includes a detection unit and a controller, the detection unit being electrically connected to the controller, and the detection unit being used to send the detected status parameter signals of the evaporator to the controller.
[0018] Beneficial effects: By setting up a detection unit and a controller, with the detection unit electrically connected to the controller, the detection unit can collect the status parameter signals of the evaporator in real time and transmit the status parameter signals to the controller, enabling real-time monitoring of the evaporator status and early warning of potential faults.
[0019] In one optional embodiment, the detection unit includes multiple liquid level sensors, each of which is configured to correspond one-to-one with a plurality of evaporators. The liquid level sensors are used to detect the liquid level height of the refrigerant in the corresponding evaporation chamber.
[0020] Beneficial effects: The liquid level sensor can detect the refrigerant level in the evaporator chamber in real time and send the level information to the controller. If the liquid level in an evaporator is too low, it indicates that the currently allocated refrigerant is insufficient, which may lead to the evaporator's heat exchange area not being fully utilized and a decrease in heat dissipation capacity.
[0021] In one optional embodiment, the detection unit includes a plurality of temperature sensors, each of which is configured to correspond one-to-one with a plurality of evaporators, and the temperature sensors are used to detect the internal temperature of the corresponding evaporation chamber.
[0022] Beneficial effects: After the temperature sensor transmits the real-time temperature signal to the controller, if the temperature of a certain evaporator is higher than the preset threshold, it indicates that the heat dissipation capacity of the evaporator is insufficient and its heat dissipation capacity needs to be enhanced; if the temperature is much lower than the threshold, it may be that the refrigerant is over-distributed or the load of the heat source component is reduced. In this case, the refrigerant supply can be reduced to avoid waste of resources.
[0023] In one optional embodiment, the detection unit includes a plurality of pressure sensors, each pressure sensor being configured in a one-to-one correspondence with a plurality of evaporators, and the pressure sensors being used to detect the internal pressure of the corresponding evaporation chamber.
[0024] Beneficial effects: The evaporator chamber is the core area where the refrigerant absorbs heat and vaporizes from a liquid state to a gaseous state. Its internal pressure is directly related to the phase change state of the refrigerant. If the pressure in the evaporator chamber is normal, it indicates that the refrigerant is fully evaporated within the evaporator chamber, the heat exchange process is highly efficient, and it can continuously remove heat from the heat source components.
[0025] In one optional embodiment, the wind turbine cooling system further includes multiple electrically controlled valves, each electrically connected to the controller, which adjusts the opening degree of the corresponding electrically controlled valve based on the received status parameter signal.
[0026] Beneficial effects: By installing electrically controlled valves on each branch, the opening degree of the electrically controlled valves can regulate the refrigerant flow into the corresponding evaporator. The controller can flexibly adjust the opening degree of the electrically controlled valves according to the status parameter signals detected by the detection unit, so as to achieve precise distribution of refrigerant flow and ensure that the refrigerant supply of each evaporator matches its real-time heat load.
[0027] In one alternative embodiment, the condenser is provided with a pressure relief valve, which is in communication with the receiving cavity.
[0028] Beneficial effects: When the pressure in the condenser housing exceeds the standard due to abnormal refrigerant accumulation or a sudden rise in ambient temperature, the pressure relief valve will automatically open to release the pressure in the housing to a safe range, preventing safety accidents such as condenser shell deformation, pipe rupture, or refrigerant leakage caused by overpressure, and providing reliable overpressure protection for the system.
[0029] In one alternative embodiment, the condenser is located on the top wall of the cabin.
[0030] Beneficial effects: The top wall of the cabin is usually directly exposed to the external environment, with better air circulation. The condenser is located on the top wall of the cabin, which can directly contact more natural air, accelerate the heat exchange between the refrigerant and the external environment, and improve condensation efficiency. At the same time, the top wall is far away from the heat source components inside the cabin, which can avoid the interference of the high temperature environment inside the cabin on the condensation process and ensure stable condensation effect.
[0031] Secondly, this utility model also provides a wind turbine generator, comprising:
[0032] The cabin contains multiple heat source components;
[0033] A wind turbine cooling system, wherein the condenser is located outside the nacelle, and the evaporator is located inside the nacelle and is configured corresponding to the heat source components.
[0034] Beneficial effects: This wind turbine, because it includes a wind turbine cooling system, has the same effect as a wind turbine cooling system, which will not be elaborated here. Attached Figure Description
[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0036] Figure 1 This is a schematic diagram of the principle of a wind turbine generator in one embodiment provided in this application;
[0037] Figure 2 This is a schematic diagram of the principle of a wind turbine cooling system in one embodiment provided in this application.
[0038] Explanation of reference numerals in the attached figures:
[0039] 100. Condenser; 110. Receiving cavity; 120. Pressure relief valve;
[0040] 200. Evaporator; 210. Evaporation chamber;
[0041] 300. Connecting pipe; 310. Main pipe; 320. Branch pipe;
[0042] 400. Diverter valve;
[0043] 500, Detection Unit;
[0044] 600. Electrically controlled valve;
[0045] 1000, Cabin; 1100, Heat source components. Detailed Implementation
[0046] In related technologies, water cooling systems are typically used to dissipate heat from the aforementioned heat source components. However, since this system requires a large number of components such as water pumps, valves, and heaters, and also requires the construction of complex circulation pipe networks and supports, it not only results in high equipment costs but also occupies a large amount of space.
[0047] Reducing the cost of the heat dissipation system was one of the core objectives during the development of this application. Initially, the R&D team focused on simplifying the existing water cooling system, attempting to control costs by streamlining components or reducing piping. Specifically, the plan was to retain the heat dissipation circuits for the core heat source components with high temperatures inside the engine compartment, while removing the heat dissipation configurations for other heat source components with relatively low temperatures. This would reduce the amount of water pumps, valves, piping, and supports used, thereby reducing manufacturing costs and system complexity.
[0048] In the short term, this simplified approach does provide some cooling for high-temperature heat source components, preventing core components from failing due to overheating to a certain extent. However, its limitations are also quite obvious: although the heat source components within the wind turbine nacelle have different heat outputs, they all need to operate within specific temperature ranges to ensure stable performance. Other heat source components that have had their cooling features omitted will accumulate heat during long-term operation, gradually exceeding their safe operating temperature range. This can not only lead to malfunctions of the components themselves but also affect surrounding equipment through heat conduction, potentially triggering a chain reaction of failures and, in severe cases, threatening the operational safety of the entire unit.
[0049] Based on this, the inventors of this application redesigned the heat dissipation system of the wind turbine generator, changing it from a conventional single-phase circulating water cooling system to a phase change medium single-channel cooling system. When installing the heat dissipation system, the condenser is installed on the outside of the wind turbine generator nacelle, the evaporator is installed inside the nacelle, and the heat source components of the evaporator are set up. The evaporation chamber of the evaporator and the receiving chamber of the condenser are connected by connecting pipes.
[0050] During the heat dissipation cycle, because the condenser is located outside the engine compartment, it can directly exchange heat with the external environment, accelerating refrigerant condensation and causing the gaseous refrigerant in the containment chamber to condense into liquid refrigerant. By placing the condenser above the evaporator, the liquid refrigerant can flow naturally to the evaporator through the connecting pipes under the influence of gravity, eliminating the need for power equipment such as water pumps. This saves energy and reduces the risk of system failure due to power component malfunctions, significantly improving the stability and reliability of the heat dissipation cycle. The liquid refrigerant in the evaporator absorbs heat from the heat source components, dissipating heat for them. In this process, the liquid refrigerant vaporizes into gaseous refrigerant, which can then flow back to the condenser's containment chamber through the connecting pipes, achieving a self-driven heat dissipation cycle within a single channel.
[0051] Compared to existing water-cooling systems, this system does not require a large number of components such as water pumps, valves, and heaters, nor does it require the construction of complex pipe network supports. This significantly reduces the number of parts and system redundancy, which not only lowers manufacturing costs but also reduces the space occupied by the equipment. It is better suited to the needs of wind turbine generator sets to develop towards larger capacity and higher power density. At the same time, the simplified structure also reduces the burden of later operation and maintenance.
[0052] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.
[0053] The following is combined Figures 1 to 2 The following describes embodiments of the present invention.
[0054] According to embodiments of the present invention, on the one hand, such as Figure 1 and Figure 2 As shown, a wind turbine cooling system is provided, including a condenser 100 and an evaporator 200.
[0055] Specifically, such as Figure 1 and Figure 2 As shown, the condenser 100 is installed outside the nacelle 1000 of the wind turbine, and the condenser 100 has a receiving cavity 110 for containing refrigerant.
[0056] Specifically, such as Figure 1 and Figure 2 As shown, the evaporator 200 is installed inside the engine compartment 1000, and the evaporator 200 is provided corresponding to the heat source component 1100. The evaporator 200 is located below the condenser 100, and the evaporator 200 is provided with an evaporation chamber 210. The evaporation chamber 210 of the evaporator 200 is connected to the receiving chamber 110 of the condenser 100 through a connecting pipe 300 to form a heat dissipation cycle.
[0057] Specifically, during the heat dissipation cycle, the condenser 100 condenses the gaseous refrigerant into liquid refrigerant, and the liquid refrigerant is transported to the evaporation chamber 210 through the connecting pipe 300. The liquid refrigerant in the evaporation chamber 210 absorbs the heat from the heat source component 1100 and vaporizes into gaseous refrigerant. The gaseous refrigerant flows back to the receiving chamber 110 through the connecting pipe 300.
[0058] In this wind turbine cooling system, the condenser 100 is installed outside the nacelle 1000 of the wind turbine, the evaporator 200 is installed inside the nacelle 1000, and the evaporator 200 is positioned corresponding to the heat source component 1100. The evaporation chamber 210 of the evaporator 200 and the receiving chamber 110 of the condenser 100 are connected by a connecting pipe 300.
[0059] During the heat dissipation cycle, since the condenser 100 is located outside the engine compartment 1000, it can directly exchange heat with the external environment, accelerating refrigerant condensation and causing the gaseous refrigerant in the containment cavity 110 to condense into liquid refrigerant. By placing the condenser 100 above the evaporator 200, the liquid refrigerant can flow naturally to the evaporator 200 through the connecting pipe 300 under the influence of gravity, without relying on power equipment such as water pumps. This saves energy consumption and reduces the risk of system failure caused by power component failure, significantly improving the stability and reliability of the heat dissipation cycle. The liquid refrigerant in the evaporator cavity 210 absorbs heat from the heat source component 1100 and dissipates heat from the heat source component 1100. During this process, the liquid refrigerant vaporizes into gaseous refrigerant, which can then flow back to the containment cavity 110 of the condenser 100 through the connecting pipe 300, realizing a self-driven heat dissipation cycle of refrigerant within a single channel.
[0060] Compared to existing water-cooling systems, this system does not require a large number of components such as water pumps, valves, and heaters, nor does it require the construction of complex pipe network supports. This significantly reduces the number of parts and system redundancy, which not only lowers manufacturing costs but also reduces the space occupied by the equipment. It is better suited to the needs of wind turbine generator sets to develop towards larger capacity and higher power density. At the same time, the simplified structure also reduces the burden of later operation and maintenance.
[0061] It should be noted that the heat source component 1100 may be a generator, transformer, gearbox, frequency converter, etc. In this embodiment, the type of heat source component 1100 is not specifically limited.
[0062] Specifically, the condenser 100 can be an air-cooled condenser 100, etc. In this embodiment, the type of condenser 100 is not specifically limited.
[0063] For example, the condenser 100 adopts a finned tube structure, consisting of metal tubes (such as copper or aluminum tubes) and fins (made of aluminum or copper). The refrigerant flows inside the tubes, and the heat is carried away by airflow outside the tubes. It directly utilizes the natural wind outside the nacelle 1000 for heat dissipation, without the need for additional cooling medium; the finned structure can increase the heat exchange area, improve condensation efficiency, and adapt to the strong airflow environment outside the wind turbine nacelle 1000.
[0064] Specifically, the evaporator 200 can be a plate evaporator 200, a tubular evaporator 200, etc. In this embodiment, the type of evaporator 200 is not specifically limited.
[0065] For example, the evaporator 200 uses a metal tube (copper or aluminum) bent into a serpentine or coiled shape. The refrigerant flows inside the tube, and the heat is absorbed from the heat source component 1100 through contact or radiation outside the tube. It has a simple structure, good high-pressure resistance, and can be flexibly arranged according to the shape of the heat source component 1100 to adapt to heat source components 1100 of different shapes.
[0066] Specifically, the refrigerant can be R134a (tetrafluoroethane), R1233zd, etc. In the embodiments of this application, no specific restrictions are placed on the type of refrigerant.
[0067] Specifically, the connecting pipe 300 can be a square pipe, a round pipe, etc. In this embodiment, the shape of the connecting pipe 300 is not specifically limited.
[0068] In one embodiment, such as Figure 1 and Figure 2 As shown, multiple evaporators 200 are provided, each corresponding to a different heat source component 1100. The connecting pipe 300 includes a main pipe 310 and multiple branch pipes 320. One end of the main pipe 310 is connected to the receiving cavity 110, and the other end is connected to one end of each of the branch pipes 320. Each branch pipe 320 corresponds to one of the multiple evaporators 200, and the other end of each branch pipe 320 is connected to the evaporation chamber 210 of its corresponding evaporator 200.
[0069] Multiple evaporators 200 are configured one-to-one with multiple heat source components 1100 (such as generators, gearboxes, frequency converters, etc.) within the nacelle 1000. This allows for direct, close-range heat absorption of each core heat-generating component, ensuring efficient cooling of each heat source component 1100. This improves the overall system's heat dissipation effect on the unit's core components and avoids the uneven heat distribution problem that occurs when a single evaporator 200 dissipates heat from multiple heat source components 1100. The evaporation rate can dynamically match the heat output of the core components, eliminating the need for temperature-controlled three-way valves, water pumps, heaters, etc., required for dynamic temperature control in water-cooled systems.
[0070] Multiple evaporators 200 operate independently. If a branch pipe 320 or the corresponding evaporator 200 experiences a minor fault, it will only affect the heat dissipation of the heat source component 1100 corresponding to that branch. Through system redundancy design (such as appropriately increasing the heat dissipation margin of other evaporators 200), the risk of overall system failure can be reduced. Compared with the situation where a single evaporator 200 failure would lead to the interruption of all heat dissipation, the stability is better.
[0071] The main pipe 310 serves as the main channel for refrigerant delivery. After extending from the condenser 100 into the nacelle 1000, it connects to each evaporator 200 via branch pipes 320. This eliminates the need to lay long connecting pipes 300 separately for each evaporator 200, reducing the total length and cross-tangle of the connecting pipes 300. It is more suitable for the small space layout with many intersecting components inside the wind turbine nacelle 1000, while also reducing the difficulty of installing the connecting pipes 300.
[0072] Specifically, multiple evaporators 200 correspond to multiple heat source components 1100. It can be that one evaporator 200 corresponds to one heat source component 1100, or multiple evaporators 200 correspond to one heat source component 1100. In this embodiment, the correspondence between evaporators 200 and heat source components 1100 is not specifically limited.
[0073] In one embodiment, such as Figure 1 and Figure 2 As shown, the wind turbine cooling system also includes a diversion valve 400, wherein each branch pipe 320 is connected to the main pipe 310 through the diversion valve 400. The liquid refrigerant condensed by the condenser 100 is distributed to each branch pipe 320 according to a preset ratio through the diversion valve 400 and delivered to the corresponding evaporator 200.
[0074] Because the heat output and real-time temperature of the multiple heat source components 1100 of a wind turbine (such as the generator, converter, gearbox, etc.) often differ (for example, the heat output of the converter may be much higher than that of the gearbox when the unit is running at full load), a diversion valve 400 can be set up to precisely distribute liquid refrigerant according to a preset ratio (such as the rated heat dissipation of each heat source component 1100 and the real-time monitored temperature data): the branch pipe 320 corresponding to the heat source component 1100 with high heat output receives more refrigerant, ensuring that its evaporator 200 has sufficient liquid refrigerant for vaporization and heat absorption; the heat source component 1100 with low heat output receives less refrigerant to avoid waste.
[0075] Specifically, if the diversion valve 400 is not installed, the main pipe 310 directly distributes the liquid refrigerant to the branch pipes 320. Since the length of each branch pipe 320 and the resistance of the evaporator 200 may differ, the refrigerant tends to concentrate in the branch with lower resistance, resulting in some evaporators 200 accumulating liquid due to excessive refrigerant, and some evaporators 200 having insufficient heat dissipation due to insufficient refrigerant.
[0076] Specifically, the diversion valve 400 can balance the flow resistance of each branch pipe 320 through internal structure, such as throttling orifice and valve core adjustment, and force the refrigerant to be distributed according to a preset ratio, so that each evaporator 200 can obtain liquid refrigerant that matches its design load, so that all evaporators 200 are in a high-efficiency heat exchange state and avoid local inefficiency dragging down the overall system.
[0077] Specifically, the diversion valve 400 can be a fixed proportional diversion valve 400, a thermally induction diversion valve 400, an electric proportional diversion valve 400, etc. In this embodiment, the type of diversion valve 400 is not specifically limited.
[0078] For example, taking the flow divider valve 400 as a fixed ratio flow divider valve 400, it consists of a valve body, multiple outlet branch pipes 320 interfaces and a manual adjustment knob. The opening degree of the internal valve core (such as throttling orifice or baffle) is adjusted by the knob to preset the flow ratio of each outlet.
[0079] In one embodiment, such as Figure 2 As shown, the wind turbine cooling system also includes a detection unit 500 and a controller (not shown in the figure). The detection unit 500 is electrically connected to the controller. The detection unit 500 is used to detect the status parameter signals of the evaporator 200 and send the detected status parameter signals to the controller.
[0080] By setting up a detection unit 500 and a controller, the detection unit 500 is electrically connected to the controller. The detection unit 500 can collect the status parameter signals of the evaporator 200 in real time and transmit the status parameter signals to the controller, which can monitor the status of the evaporator 200 in real time and provide early warning of potential faults.
[0081] Specifically, the status parameter signal can be the pressure and temperature inside the evaporator 200, or even the liquid level and frost condition inside the evaporator 200. In this embodiment, no specific restrictions are imposed on the status parameter signal.
[0082] For example, if the refrigerant temperature in an evaporator 200 rises abnormally or the pressure drops suddenly, the controller can immediately identify these abnormal signals and notify the maintenance personnel through audible and visual alarms or remote communication, thus preventing the wind turbine's heat source component 1100 from overheating and shutting down due to a malfunction of the evaporator 200, or even more serious equipment burn-out accidents.
[0083] In one embodiment, such as Figure 2 As shown, the detection unit 500 includes multiple liquid level sensors, wherein each liquid level sensor is configured in a one-to-one correspondence with a multiple evaporator 200, and the liquid level sensor is used to detect the liquid level height of the refrigerant in the corresponding evaporator chamber 210.
[0084] The liquid level sensor can detect the refrigerant level in the evaporator chamber 210 in real time and send the liquid level to the controller. If the liquid level in an evaporator 200 is too low, it indicates that the currently allocated refrigerant is insufficient, which may result in the heat exchange area of the evaporator 200 not being fully utilized and the heat dissipation capacity decreasing.
[0085] Furthermore, after the liquid level sensor transmits the real-time liquid level height to the controller, the controller can adjust the diversion valve 400 accordingly. For evaporators 200 with low liquid levels, the refrigerant distribution ratio of their branch pipes 320 is increased; for evaporators 200 with high liquid levels, the refrigerant distribution is reduced to avoid the risk of liquid slugging.
[0086] Specifically, the liquid level sensor, in conjunction with the controller, can stabilize the liquid level in each evaporator 200 at a suitable height, ensuring that the liquid refrigerant is evenly distributed and fully evaporated within the evaporator 200, thereby maximizing the utilization rate of the heat exchange area.
[0087] In one embodiment, the detection unit 500 includes a plurality of temperature sensors, wherein the plurality of temperature sensors are configured one-to-one with a plurality of evaporators 200, and the temperature sensors are used to detect the internal temperature of the corresponding evaporation chamber 210.
[0088] After the temperature sensor transmits the real-time temperature signal to the controller, if the temperature of a certain evaporator 200 is higher than the preset threshold, it indicates that the heat dissipation capacity of the evaporator 200 is insufficient and its heat dissipation capacity needs to be enhanced; if the temperature is much lower than the threshold, it may be that the refrigerant is over-distributed or the load of the heat source component 1100 is reduced. In this case, the refrigerant supply can be reduced to avoid wasting resources.
[0089] The temperature sensor monitors the temperature of the evaporator chamber 210 in real time. If the temperature of an evaporator 200 rises suddenly (e.g., exceeding the safety limit), the controller can immediately trigger an alarm (e.g., audible and visual alarm or remote notification to maintenance personnel) and take emergency measures (e.g., increasing the refrigerant flow of the evaporator 200 or reducing the load on the corresponding components) to prevent the heat source component 1100 from being damaged due to overheating.
[0090] Specifically, after the temperature sensor transmits the real-time temperature signal to the controller, the controller can combine it with other parameters such as the liquid level to more comprehensively determine the operating status of the evaporator 200. For example, if the temperature of an evaporator 200 is too high and the liquid level is too low, it can be clearly determined that insufficient refrigerant is causing insufficient heat dissipation, and the distribution ratio of the diversion valve 400 should be increased first.
[0091] In one embodiment, the detection unit 500 includes a plurality of pressure sensors, wherein the plurality of pressure sensors are configured one-to-one with a plurality of evaporators 200, and the pressure sensors are used to detect the internal pressure of the corresponding evaporation chamber 210.
[0092] The evaporator chamber 210 is the core area where the refrigerant absorbs heat and vaporizes from a liquid state to a gaseous state. Its internal pressure is directly related to the phase change state of the refrigerant. If the pressure in the evaporator chamber 210 is normal, it means that the refrigerant has fully evaporated in the evaporator chamber 210, the heat exchange process is efficient, and it can continuously remove the heat from the heat source component 1100.
[0093] In one embodiment, such as Figure 2As shown, the wind turbine cooling system also includes multiple electrically controlled valves 600, which are electrically connected to the controller. The controller adjusts the opening degree of the corresponding electrically controlled valve 600 based on the received status parameter signals.
[0094] By setting up electrically controlled valves 600 on each branch, the opening degree of the electrically controlled valves 600 can adjust the refrigerant flow into the corresponding evaporator 200 (the larger the opening degree, the larger the flow rate). The controller can flexibly adjust the opening degree of the electrically controlled valves 600 according to the status parameter signals detected by the detection unit 500 (such as the temperature, liquid level, pressure, etc. of the evaporator 200), so as to achieve precise distribution of refrigerant flow and ensure that the refrigerant supply of each evaporator 200 matches its real-time heat load.
[0095] The controller adjusts the opening of the electrically controlled valve 600 based on status parameter signals, dynamically adjusting the refrigerant flow in each branch. When an evaporator 200 is under low load, reducing the opening of its electrically controlled valve 600 reduces the refrigerant flow, preventing excess refrigerant from failing to evaporate fully in the evaporator 200 and thus reducing heat exchange efficiency. When the overall load is low, simultaneously reducing the opening of multiple electrically controlled valves 600 reduces the total amount of refrigerant circulating in the system, thereby reducing energy consumption and improving system operating efficiency.
[0096] Specifically, when a heat source component 1100 suddenly overheats, such as when a heat source component 1100 experiences a sudden increase in heat generation due to a short-term overload, the controller can quickly increase the opening of the electrically controlled valve 600 based on the status parameter signal from the detection unit 500. This increases the refrigerant supply and quickly removes heat to suppress the temperature surge. If an evaporator 200 leaks (e.g., abnormal pressure or liquid level drop), its electrically controlled valve 600 can be immediately reduced or even closed to prevent continuous refrigerant loss. Simultaneously, this ensures normal liquid supply to other evaporators 200, reducing the impact of sudden failures on the overall system heat dissipation and improving operational stability.
[0097] In one embodiment, such as Figure 2 As shown, the condenser 100 is equipped with a pressure relief valve 120, which is connected to the receiving cavity 110.
[0098] When the pressure in the condenser 100 housing cavity 110 exceeds the standard due to abnormal refrigerant accumulation or a sudden rise in ambient temperature, the pressure relief valve 120 will automatically open to release the pressure in the housing cavity 110 to a safe range, thus preventing safety accidents such as condenser 100 shell deformation, pipeline rupture, or refrigerant leakage caused by overpressure, and providing reliable overpressure protection for the system.
[0099] By releasing overpressure in a timely manner through the pressure relief valve 120, fatigue damage to the condenser 100 and related components due to prolonged exposure to excessive pressure can be avoided, reducing the frequency of component replacement due to pressure failure, thereby lowering maintenance costs and extending the service life of the entire heat dissipation system.
[0100] Specifically, the pressure relief valve 120 can be located at the top of the condenser 100. When the condenser 100 is running, the gaseous refrigerant usually accumulates at the top of the housing cavity 110. This area is prone to high pressure due to untimely condensation. By placing the pressure relief valve 120 here, the high pressure at the top can be directly monitored and released, quickly relieving the pressure inside the housing cavity 110 and preventing the pressure from accumulating at the top and causing excessive pressure on the condenser 100.
[0101] In one embodiment, such as Figure 1 As shown, the condenser 100 is installed on the top wall of the nacelle 1000.
[0102] The top wall of the engine compartment 1000 is usually directly exposed to the external environment, allowing for better air circulation. The condenser 100 is located on the top wall of the engine compartment 1000, which allows it to directly contact more natural airflow, accelerating the heat exchange between the refrigerant and the external environment and improving condensation efficiency. At the same time, the top wall is far away from the heat source components 1100 inside the engine compartment 1000, which can avoid the interference of the high temperature environment inside the engine compartment 1000 on the condensation process and ensure stable condensation performance.
[0103] When the wind turbine is running, the nacelle 1000 automatically adjusts its direction via the yaw system to align with the wind direction, ensuring that the blades efficiently capture wind energy. The condenser 100 is located on the top wall of the nacelle 1000, and can always maintain a direct line of sight to the wind direction with the nacelle 1000's yaw. This keeps the condenser 100 surface continuously facing the wind, achieving stable and sufficient airflow without additional power, significantly enhancing the heat exchange intensity between the refrigerant and the air, and further improving condensation efficiency.
[0104] According to an embodiment of the present invention, on the other hand, as... Figure 1 and Figure 2 As shown, a wind turbine is also provided, including a nacelle 1000 and a wind turbine cooling system.
[0105] Specifically, such as Figure 1 As shown, the cabin 1000 contains multiple heat source components 1100.
[0106] Specifically, such as Figure 1 and Figure 2 As shown, the condenser 100 is located outside the engine compartment 1000, and the evaporator 200 is located inside the engine compartment 1000 and is positioned corresponding to the heat source component 1100.
[0107] This wind turbine, since it includes a wind turbine cooling system, has the same effect as a wind turbine cooling system, so it will not be described in detail here.
[0108] The terms "upper" and "lower" are used to describe the relative positions of the various structures in the accompanying drawings. They are only for clarity of description and are not intended to limit the scope of implementation of this application. Any changes or adjustments to the relative positions without substantially altering the technical content shall also be considered within the scope of implementation of this application.
[0109] It should be noted that, in this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0110] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0111] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A wind turbine cooling system, characterized in that, include: A condenser (100) is located outside the nacelle (1000) of the wind turbine generator, and the condenser (100) is provided with a receiving cavity (110) for containing refrigerant. An evaporator (200) is provided in the engine compartment (1000) and is set corresponding to the heat source component (1100). The evaporator (200) is located below the condenser (100). An evaporation chamber (210) is provided in the evaporator (200). The evaporation chamber (210) is connected to the receiving chamber (110) through a connecting pipe (300) to form a heat dissipation cycle. During the heat dissipation cycle, the condenser (100) condenses the gaseous refrigerant into a liquid refrigerant, and the liquid refrigerant is transported to the evaporation chamber (210) through the connecting pipe (300); the liquid refrigerant in the evaporation chamber (210) absorbs heat from the heat source component (1100) and vaporizes into a gaseous refrigerant, and the gaseous refrigerant flows back to the receiving chamber (110) through the connecting pipe (300).
2. The wind turbine cooling system according to claim 1, characterized in that, The evaporator (200) is provided in multiple ways, and the multiple evaporators (200) are provided corresponding to multiple heat source components (1100); The connecting pipe (300) includes a main pipe (310) and a plurality of branch pipes (320). One end of the main pipe (310) is connected to the receiving cavity (110), and the other end is connected to one end of each of the plurality of branch pipes (320). The plurality of branch pipes (320) are arranged one-to-one with the plurality of evaporators (200), and the other end of each branch pipe (320) is connected to the evaporation cavity (210) of the corresponding evaporator (200).
3. The wind turbine cooling system according to claim 2, characterized in that, The wind turbine cooling system also includes a diversion valve (400), and each of the branch pipes (320) is connected to the main pipe (310) through the diversion valve (400). The diversion valve (400) is used to distribute the liquid refrigerant condensed by the condenser (100) to each of the branch pipes (320) according to a preset ratio.
4. The wind turbine cooling system according to claim 3, characterized in that, The wind turbine cooling system also includes a detection unit (500) and a controller. The detection unit (500) is electrically connected to the controller and is used to send the detected status parameter signals of the evaporator (200) to the controller.
5. The wind turbine cooling system according to claim 4, characterized in that, The detection unit (500) includes multiple liquid level sensors, each of which is configured in a one-to-one correspondence with one of the multiple evaporators (200). The liquid level sensors are used to detect the liquid level height of the refrigerant in the corresponding evaporation chamber (210).
6. The wind turbine cooling system according to claim 4, characterized in that, The detection unit (500) includes multiple temperature sensors, each of which is configured in a one-to-one correspondence with one of the multiple evaporators (200). The temperature sensors are used to detect the internal temperature of the corresponding evaporation chamber (210).
7. The wind turbine cooling system according to claim 4, characterized in that, The detection unit (500) includes multiple pressure sensors, each of which is configured in a one-to-one correspondence with one of the multiple evaporators (200). The pressure sensors are used to detect the internal pressure of the corresponding evaporation chamber (210).
8. The wind turbine cooling system according to claim 4, characterized in that, The wind turbine cooling system also includes multiple electrically controlled valves (600), which are electrically connected to the controller. The controller adjusts the opening degree of the corresponding electrically controlled valve (600) based on the received status parameter signal.
9. The wind turbine cooling system according to any one of claims 1 to 8, characterized in that, The condenser (100) is provided with a pressure relief valve (120), which is connected to the receiving cavity (110).
10. The wind turbine cooling system according to any one of claims 1 to 8, characterized in that, The condenser (100) is located on the top wall of the cabin (1000).
11. A wind turbine generator, characterized in that, include: The cabin (1000) contains multiple heat source components (1100); According to any one of claims 1 to 10, the condenser (100) is located outside the nacelle (1000), and the evaporator (200) is located inside the nacelle (1000) and is provided corresponding to the heat source component (1100).