A synergistic cooling device based on differential temperature medium dynamic displacement method

Abstract

The utility model discloses a kind of based on dynamic replacement method of temperature difference medium, its including synergistic cooling branch system and unit original heat dissipation system, wherein: synergistic cooling branch system includes centralized controller, low-temperature medium tank, temperature difference alternating tank, rear-end heat exchanger, rear-end radiator, material cold compressor, low-temperature medium circulating pump, material cold circulating pump, temperature difference medium circulating pump, synergistic heat pump, low-temperature medium valve, tank inter throttling valve, synergistic heat exchange valve, front-end material cold temperature sensor, rear-end material cold temperature sensor, rear-end low-temperature medium temperature sensor, temperature difference medium circulating flow sensor, low-temperature medium tank temperature sensor, synergistic heat pump flow sensor, temperature difference alternating tank liquid level sensor, temperature difference alternating tank temperature sensor and synergistic check valve, unit original heat dissipation system includes original unit equipment, original unit heat exchanger, original unit radiator and original unit circulating pump etc.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary heat dissipation for equipment such as water-cooled frequency converters, speed increasers, and generators in wind turbine generator sets. Specifically, it relates to an efficiency-enhancing cooling device based on the dynamic displacement method of differential temperature medium. Background Technology

[0002] With the increasing size of wind turbines in China, supporting equipment such as speed increasers and frequency converters also need to be larger. In this process of increasing turbine size, effective heat dissipation of these large components is a crucial issue that needs to be addressed. Currently, the heat dissipation systems for large components often employ single-stage liquid cooling, single-stage air cooling, or a combination of these methods. However, as the turbine operates for longer periods and the equipment ages, its heat dissipation capacity decreases. Utility Model Content

[0003] This invention provides an enhanced cooling device based on the dynamic displacement method of differential temperature medium, which solves the technical problems existing in the prior art.

[0004] To achieve the above objectives, this utility model provides an efficiency-enhancing cooling device based on the dynamic displacement method of differential temperature medium, which includes an efficiency-enhancing cooling branch system and the original heat dissipation system of the unit, wherein:

[0005] The enhanced cooling branch system includes a centralized controller, a cryogenic medium tank, a differential temperature exchange tank, a downstream heat exchanger, a downstream radiator, a material cooling compressor, a cryogenic medium circulation pump, a material cooling circulation pump, a differential temperature medium circulation pump, an enhanced heat exchange pump, a cryogenic medium valve, an inter-tank throttling valve, an enhanced heat exchange valve, a front-end material cooling temperature sensor, a downstream material cooling temperature sensor, a downstream cryogenic medium temperature sensor, a differential temperature medium circulation flow sensor, a cryogenic medium tank temperature sensor, an enhanced heat exchange pump flow sensor, a differential temperature exchange tank level sensor, a differential temperature exchange tank temperature sensor, and an enhanced check valve.

[0006] The original cooling system of the unit includes the original unit equipment, the original unit heat exchanger, the original unit radiator, the original unit circulating pump, the main circuit heat exchange valve, the initial medium temperature sensor before heat exchange, the heat exchange medium temperature sensor after heat exchange, the efficiency compensation temperature sensor, the cooling medium temperature sensor, the cooling medium flow sensor, and the initial medium temperature sensor after heat exchange.

[0007] The central controller is wirelessly connected to the front-end material cooling temperature sensor, the back-end material cooling temperature sensor, the back-end cryogenic medium temperature sensor, the differential temperature medium circulation flow sensor, the cryogenic medium tank temperature sensor, the efficiency-enhancing heat exchange pump flow sensor, the differential temperature exchange tank level sensor, the differential temperature exchange tank temperature sensor, the initial medium pre-exchange temperature sensor, the heat exchange medium post-exchange temperature sensor, the efficiency-enhancing compensation temperature sensor, the cooling medium temperature sensor, the cooling medium flow sensor, and the initial medium post-exchange temperature sensor. The flow and temperature data read by each sensor are sent to the central controller.

[0008] Cryogenic medium tanks are used to store cryogenic compensation heat exchange media.

[0009] The differential temperature exchange tank has a built-in high-efficiency heat exchange structure for mixing high and low temperature heat exchange media, thereby cooling down the high-temperature media.

[0010] The refrigeration compressor converts the refrigerant within the unit into a gaseous-liquid mixture, improving cooling efficiency.

[0011] The cryogenic medium circulation pump draws the cryogenic compensation heat exchange medium from the cryogenic medium tank, cools it down through the downstream heat exchanger, and then returns it to the cryogenic medium tank.

[0012] The refrigerant circulation pump draws heat from the refrigerant after it has been compressed by the refrigerant compressor, passing it through a downstream heat exchanger to exchange heat with a low-temperature compensation heat exchange medium, then through a downstream radiator to dissipate heat, before finally being compressed again by the refrigerant compressor, thus completing the cycle.

[0013] The differential temperature medium circulation pump is used to pump the low-temperature compensation heat exchange medium from the low-temperature medium tank into the differential temperature exchange tank, where it mixes with the high-temperature medium flowing from the original unit's heat exchanger for cooling.

[0014] The enhanced heat exchange pump pumps the cooled medium, which has been mixed and cooled in the differential temperature exchange tank, into the original unit's radiator.

[0015] The cryogenic medium valve is located between the cryogenic medium tank and the downstream heat exchanger.

[0016] The inter-tank throttling valve is installed between the cryogenic medium tank and the differential temperature exchange tank.

[0017] The enhanced heat exchange valve is installed between the original unit's heat exchanger and the differential temperature exchange tank.

[0018] The first end of the enhanced check valve is connected to the flow sensor of the enhanced heat exchange pump, and the second end is connected to the main circuit heat exchange valve and the enhanced compensation temperature sensor. The enhanced check valve is used to prevent backflow of the medium in the branch pipeline.

[0019] The original unit equipment consisted of heat exchange and cooling devices found in the original wind turbine units.

[0020] The main circuit heat exchange valve can be opened or closed according to actual working needs.

[0021] In one embodiment of this utility model, the cryogenic medium circulation pump, the physical cooling circulation pump, the differential temperature medium circulation pump, and the enhanced heat exchange pump all have variable frequency speed regulation function, providing different flow rates and speeds according to different cooling requirements.

[0022] In one embodiment of this utility model, the original unit equipment is a water-cooled frequency converter, speed increaser, or generator in a wind turbine generator set.

[0023] The enhanced cooling device based on the differential temperature medium dynamic displacement method provided by this utility model can efficiently dissipate heat according to the needs of the device operation, and has strong practicality and application value. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an enhanced cooling device based on the dynamic displacement method of differential temperature medium according to an embodiment of the present invention. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Figure 1 This is a schematic diagram of the structure of an enhanced cooling device based on the dynamic displacement method of differential temperature medium according to an embodiment of the present invention, as shown below. Figure 1 As shown, the present invention provides an efficiency-enhancing cooling device based on the dynamic displacement method of differential temperature medium, comprising an efficiency-enhancing cooling branch system (1) and the original heat dissipation system of the unit (2), wherein:

[0028] The enhanced cooling branch system (1) includes a central controller (101), a cryogenic medium tank (102), a differential temperature exchange tank (103), a rear heat exchanger (104), a rear radiator (105), a material cooling compressor (106), a cryogenic medium circulation pump (111), a material cooling circulation pump (112), a differential temperature medium circulation pump (113), an enhanced heat exchange pump (114), a cryogenic medium valve (121), an inter-tank throttling valve (122), an enhanced heat exchange valve (123), a front-end material cooling temperature sensor (131), a rear-end material cooling temperature sensor (132), a rear-end cryogenic medium temperature sensor (133), a differential temperature medium circulation flow sensor (134), a cryogenic medium tank temperature sensor (135), an enhanced heat exchange pump flow sensor (136), a differential temperature exchange tank level sensor (137), a differential temperature exchange tank temperature sensor (138), and an enhanced check valve (141).

[0029] The original heat dissipation system (2) of the unit includes the original unit equipment (201), the original unit heat exchanger (202), the original unit radiator (203), the original unit circulating pump (211), the main circuit heat exchange valve (221), the initial medium temperature sensor before heat exchange (231), the heat exchange medium temperature sensor after heat exchange (232), the efficiency compensation temperature sensor (233), the cooling medium temperature sensor (234), the cooling medium flow sensor (235), and the initial medium temperature sensor after heat exchange (236).

[0030] The central controller (101) is wirelessly connected to the front-end material cooling temperature sensor (131), the back-end material cooling temperature sensor (132), the back-end low-temperature medium temperature sensor (133), the differential temperature medium circulation flow sensor (134), the low-temperature medium tank temperature sensor (135), the efficiency-enhancing heat exchange pump flow sensor (136), the differential temperature exchange tank level sensor (137), the differential temperature exchange tank temperature sensor (138), the initial medium before heat exchange temperature sensor (231), the heat exchange medium after heat exchange temperature sensor (232), the efficiency-enhancing compensation temperature sensor (233), the cooling medium temperature sensor (234), the cooling medium flow sensor (235), and the initial medium after heat exchange temperature sensor (236). The flow rate data and temperature data read by each sensor are sent to the central controller.

[0031] In addition, the central controller (101) is connected by wire or wireless means to control each valve and each pump in this invention.

[0032] The cryogenic medium tank (102) is used to store cryogenic compensation heat exchange medium.

[0033] The differential temperature exchange tank (103) has a built-in high-efficiency heat exchange structure for mixing high and low temperature heat exchange media. The high-temperature media is mixed and cooled down. The media in the low-temperature media tank (102) and the differential temperature exchange tank (103) are the same media, only at different temperatures. The medium temperature in the low-temperature media tank (102) is lower.

[0034] The refrigeration compressor (106) converts the refrigerant in the unit into a gaseous liquid, thereby improving the cooling efficiency.

[0035] The cryogenic medium circulation pump (111) draws the cryogenic compensation heat exchange medium from the cryogenic medium tank (102), cools it down through the downstream heat exchanger (104), and then returns it to the cryogenic medium tank (102).

[0036] The refrigerant circulating pump (112) pumps the refrigerant after gas-liquid compression by the refrigerant compressor (106) through the rear heat exchanger (104) to exchange heat with the low-temperature compensation heat exchange medium, and then through the rear radiator (105) to dissipate heat. The refrigerant is then compressed again by the refrigerant compressor (106) in this cycle.

[0037] The differential temperature medium circulation pump (113) is used to pump the low-temperature compensation heat exchange medium in the low-temperature medium tank (102) into the differential temperature exchange tank (103), where it mixes with the high-temperature medium flowing from the original unit heat exchanger (202) to cool it down.

[0038] The enhanced heat exchange pump (114) pumps the cooled medium mixed and cooled in the differential temperature exchange tank (103) into the original unit radiator (203).

[0039] A cryogenic medium valve (121) is installed between the cryogenic medium tank (102) and the downstream heat exchanger (104).

[0040] A throttling valve (122) is installed between the cryogenic medium tank (102) and the differential temperature exchange tank (103).

[0041] An enhanced heat exchange valve (123) is installed between the original unit heat exchanger (202) and the differential temperature exchange tank (103).

[0042] The first end of the enhanced check valve (141) is connected to the enhanced heat exchange pump flow sensor (136), and the second end is connected to the main circuit heat exchange valve (221) and the enhanced compensation temperature sensor (233). The enhanced check valve (141) is used to prevent backflow of the medium in the branch pipeline.

[0043] The original unit equipment (201) is the equipment in the original wind turbine unit that requires heat exchange and cooling.

[0044] The main circuit heat exchange valve (221) can be opened or closed according to actual working needs.

[0045] In one embodiment of this utility model, the low-temperature medium circulation pump (111), the material cooling circulation pump (112), the differential temperature medium circulation pump (113), and the enhanced heat exchange pump (114) all have variable frequency speed regulation function, providing different flow rates and speeds according to different cooling requirements.

[0046] In one embodiment of this utility model, the original unit equipment (201) is a water-cooled frequency converter, speed increaser or generator in a wind turbine generator set.

[0047] This invention can achieve enhanced cooling. When the enhanced cooling branch system (1) is in standby mode, the main circuit heat exchange valve (221) is open and the enhanced heat exchange valve (123) is closed. The device is divided into the following 5 circulation loops according to the cooling cycle and circulation direction.

[0048] A1: 201→211→231→202→236→201,

[0049] A2: 202→232→221→233→203→234→235→202,

[0050] A3: 103→122→102→113→134→103,

[0051] A4: 102→121→111→104→133→102,

[0052] A5: 104→131→112→105→106→132→104,

[0053] The central controller (101) calculates in real time the temperature value T1 collected by the initial medium replacement temperature sensor (236) and the temperature value T2 collected by the initial medium replacement temperature sensor (231) and calculates |T1-T2|. When |T1-T2| is less than a preset value, the enhanced cooling branch system (1) switches from standby to working state. Or when the central controller (101) detects that the maximum heat dissipation flow of the A2 circulation loop has decreased, the enhanced cooling branch system (1) switches from standby to working state.

[0054] When the enhanced cooling branch system (1) is in operation, the main circuit heat exchange valve (221) is closed and the enhanced heat exchange valve (123) is open. The device is divided into the following 5 circulation loops according to the cooling cycle and circulation direction.

[0055] A1:201→211→231→202→236→201,

[0056] B2: 202→232→123→103→114→136→141→233→203→234→235→202,

[0057] A3:103→122→102→113→134→103,

[0058] A4:102→121→111→104→133→102,

[0059] A5: 104→131→112→105→106→132→104.

[0060] By comparing the B2 loop with the A2 loop, it can be found that the heat from the original unit heat exchanger (202) flows into the differential temperature exchange tank (103) through the enhanced heat exchange valve (123) and mixes with the low-temperature medium in the differential temperature exchange tank (103) for pre-cooling. By adjusting the circulation speed of the A3, A4, and A5 loops, the temperature of the mixed medium in the differential temperature exchange tank (103) is controlled. Then, the cooled medium mixed in the differential temperature exchange tank (103) is pumped into the original unit radiator (203) by the enhanced heat exchange pump (114) for heat dissipation again. This is equivalent to the heat exchange medium flowing through the original unit heat exchanger (202) changing from one cooling in the A2 loop to two coolings in the B2 loop, thus improving the heat dissipation efficiency.

[0061] Whether the enhanced cooling branch system (1) is put into use depends mainly on the switching of the A2 and B2 circulation loops under the control of the central controller (101). When the central controller (101) determines that the heat dissipation capacity of the A2 circulation loop cannot meet the heat dissipation requirements of the original unit equipment (201) by using the initial medium before replacement temperature sensor (231), cooling medium temperature sensor (234), cooling medium flow sensor (235) and initial medium after replacement temperature sensor (236), it controls the switching state of the main circuit heat exchange valve (221) and the enhanced heat exchange valve (123) to put the enhanced cooling branch into use.

[0062] The enhanced cooling device based on the differential temperature medium dynamic displacement method provided by this utility model can efficiently dissipate heat according to the needs of the device operation, and has strong practicality and application value.

[0063] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of one embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this utility model.

[0064] Those skilled in the art will understand that the modules in the apparatus of the embodiments can be distributed in the apparatus of the embodiments as described in the embodiments, or they can be located in one or more devices different from this embodiment with corresponding changes. The modules of the above embodiments can be combined into one module, or they can be further divided into multiple sub-modules.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An enhanced cooling device based on dynamic displacement of differential temperature medium, characterized in that, It includes the efficiency-enhancing cooling branch system (1) and the original heat dissipation system of the unit (2), wherein: The enhanced cooling branch system (1) includes a central controller (101), a cryogenic medium tank (102), a differential temperature exchange tank (103), a rear heat exchanger (104), a rear radiator (105), a material cooling compressor (106), a cryogenic medium circulation pump (111), a material cooling circulation pump (112), a differential temperature medium circulation pump (113), an enhanced heat exchange pump (114), a cryogenic medium valve (121), an inter-tank throttling valve (122), an enhanced heat exchange valve (123), a front-end material cooling temperature sensor (131), a rear-end material cooling temperature sensor (132), a rear-end cryogenic medium temperature sensor (133), a differential temperature medium circulation flow sensor (134), a cryogenic medium tank temperature sensor (135), an enhanced heat exchange pump flow sensor (136), a differential temperature exchange tank level sensor (137), a differential temperature exchange tank temperature sensor (138), and an enhanced check valve (141). The original heat dissipation system (2) of the unit includes the original unit equipment (201), the original unit heat exchanger (202), the original unit radiator (203), the original unit circulating pump (211), the main circuit heat exchange valve (221), the initial medium temperature sensor before heat exchange (231), the heat exchange medium temperature sensor after heat exchange (232), the efficiency compensation temperature sensor (233), the cooling medium temperature sensor (234), the cooling medium flow sensor (235), and the initial medium temperature sensor after heat exchange (236). The central controller (101) is wirelessly connected to the front-end material cooling temperature sensor (131), the back-end material cooling temperature sensor (132), the back-end low-temperature medium temperature sensor (133), the differential temperature medium circulation flow sensor (134), the low-temperature medium tank temperature sensor (135), the efficiency-enhancing heat exchange pump flow sensor (136), the differential temperature exchange tank level sensor (137), the differential temperature exchange tank temperature sensor (138), the initial medium before heat exchange temperature sensor (231), the heat exchange medium after heat exchange temperature sensor (232), the efficiency-enhancing compensation temperature sensor (233), the cooling medium temperature sensor (234), the cooling medium flow sensor (235), and the initial medium after heat exchange temperature sensor (236). The flow rate data and temperature data read by each sensor are sent to the central controller. The cryogenic medium tank (102) is used to store cryogenic compensation heat exchange medium. The differential temperature exchange tank (103) has a built-in high-efficiency heat exchange structure for mixing high and low temperature heat exchange media, and for mixing and cooling the high-temperature media. The refrigeration compressor (106) converts the refrigerant in the unit into a gaseous liquid, thereby improving the cooling efficiency. The cryogenic medium circulation pump (111) draws the cryogenic compensation heat exchange medium from the cryogenic medium tank (102), cools it down through the downstream heat exchanger (104), and then returns it to the cryogenic medium tank (102). The refrigerant circulating pump (112) pumps the refrigerant after gas-liquid compression by the refrigerant compressor (106) through the rear heat exchanger (104) to exchange heat with the low-temperature compensation heat exchange medium, and then through the rear radiator (105) to dissipate heat. The refrigerant is then compressed again by the refrigerant compressor (106) in this cycle. The differential temperature medium circulation pump (113) is used to pump the low-temperature compensation heat exchange medium in the low-temperature medium tank (102) into the differential temperature exchange tank (103), where it mixes with the high-temperature medium flowing from the original unit heat exchanger (202) to cool it down. The enhanced heat exchange pump (114) pumps the cooled medium mixed and cooled in the differential temperature exchange tank (103) into the original unit radiator (203). A cryogenic medium valve (121) is installed between the cryogenic medium tank (102) and the downstream heat exchanger (104). A throttling valve (122) is installed between the cryogenic medium tank (102) and the differential temperature exchange tank (103). An enhanced heat exchange valve (123) is installed between the original unit heat exchanger (202) and the differential temperature exchange tank (103). The first end of the enhanced check valve (141) is connected to the enhanced heat exchange pump flow sensor (136), and the second end is connected to the main circuit heat exchange valve (221) and the enhanced compensation temperature sensor (233). The enhanced check valve (141) is used to prevent backflow of the medium in the branch pipeline. The original unit equipment (201) is the equipment in the original wind turbine unit that requires heat exchange and cooling. The main circuit heat exchange valve (221) can be opened or closed according to actual working needs.

2. The enhanced cooling device based on the dynamic displacement method of differential temperature medium according to claim 1, characterized in that, The low-temperature medium circulation pump (111), the material cooling circulation pump (112), the differential temperature medium circulation pump (113), and the enhanced heat exchange pump (114) all have variable frequency speed regulation function, providing different flow rates and speeds according to different cooling requirements.

3. The enhanced cooling device based on the dynamic displacement method of differential temperature medium according to claim 1, characterized in that, The original equipment (201) is a water-cooled frequency converter, speed increaser or generator in a wind turbine generator set.

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