Double-condensation separation type heat pipe heat exchange system

Abstract

The utility model discloses a double condensation separation type heat pipe heat exchange system, which relates to the technical field of heat pipe heat exchangers, and comprises an evaporative cooling cold water system and a separation type heat pipe heat exchange system, the separation type heat pipe heat exchange system comprises a double condensation end and an evaporation end, the double condensation end consists of a sleeve, a first working medium layer, a cooling water layer and a second working medium layer, the top of the evaporation end is connected to the first working medium layer through an ascending pipe and then connected to the second working medium layer through a first descending pipe and a first liquid pipe, the second working medium layer is connected to the bottom of the evaporation end through a second descending pipe, the top of the cooling water layer is connected with the evaporative cooling cold water system through a water return pipe, and the bottom of the system is connected with the cooling water layer through a water supply pipe. The working medium becomes gaseous after absorbing heat at the evaporation end, enters the first working medium layer through the ascending pipe for air cooling condensation, is further cooled through water cooling and then returns to the evaporation end. The system combines evaporative cooling and separated heat pipe technologies, improves the heat exchange efficiency, expands the application range, saves energy, protects the environment and is good in economical efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pipe heat exchangers, and particularly to a double-condensation separated heat pipe heat exchange system. Background Technique

[0002] Due to the advantages of high-efficiency heat transfer, low energy consumption, simple installation, low operation and maintenance costs, etc., the separated heat pipe is widely used in the fields of industrial waste heat recovery, air-conditioning ventilation, solar thermal utilization, electronic cooling systems, etc.

[0003] When the separated heat pipe works, the working medium is heated and evaporated by the heat source in the evaporation section heat exchanger. The working medium becomes gaseous and enters the condensation section heat exchanger through the riser. The working medium gas exchanges heat with the cold source in the condensation section heat exchanger and becomes liquid working medium, which flows back to the evaporation section heat exchanger by gravity through the downcomer to complete the cycle.

[0004] There are two common condensation methods for separated heat pipes, including air cooling and water cooling. In engineering practice, if an air-cooled separated heat pipe is used, when the ambient temperature rises close to the indoor evaporation side temperature, the heat transfer efficiency of the separated heat pipe heat exchanger will be greatly reduced or even unable to continue heat transfer; if a water-cooled separated heat pipe is used, a cooling water system needs to be supported all year round, resulting in high operating costs. Content of the Utility Model

[0005] In order to solve the technical defects caused by the single condensation method in the existing separated heat pipe technology, the utility model provides the following technical solutions:

[0006] The utility model provides a double-condensation separated heat pipe heat exchange system, which includes an evaporative cooling chilled water system and a separated heat pipe heat exchange system;

[0007] The separated heat pipe heat exchange system includes a separated heat pipe double-condensation end and a separated heat pipe evaporation end;

[0008] The separated heat pipe double-condensation end includes a sleeve, a first working medium layer arranged outside the sleeve, and a cooling water layer and a second working medium layer arranged in the sleeve from outside to inside in sequence;

[0009] The top of the separated heat pipe evaporation end is connected to the input end of the first working medium layer through a riser. The output end of the first working medium layer is sequentially connected to the input end of the second working medium layer through a first downcomer and a first liquid pipe. A working medium pump and a first working medium valve are sequentially arranged on the first liquid pipe according to the working medium flow direction. The output end of the second working medium layer is connected to the bottom of the separated heat pipe evaporation end through a second downcomer;

[0010] The top of the cooling water layer is connected to the interior of the evaporative cooling chilled water system through a return pipe. The bottom of the evaporative cooling chilled water system is connected to the bottom of the cooling water layer through a water supply pipe, and a cooling water pump is provided on the water supply pipe.

[0011] Further, the evaporative cooling chilled water system includes a spray row provided on the return pipe, a heat exchange core provided below the spray row, a water collection tray provided below the heat exchange core, and filters provided on both sides of the heat exchange core.

[0012] The first port of the water collection tray is connected to the input end of the water supply pipe.

[0013] Further, the second port of the water collection tray is connected to a make-up water valve.

[0014] Further, an air outlet is provided above the spray row, and a fan is provided inside the air outlet.

[0015] Further, the separated heat pipe heat exchange system further includes a second liquid pipe and a second working medium valve provided on the second liquid pipe. One end of the second liquid pipe is connected to the output end of the working medium pump, and the other end is connected to the bottom of the separated heat pipe evaporation end.

[0016] Further, a liquid storage device is provided between the first downcomer and the first liquid pipe. The input end of the liquid storage device is connected to the input end of the first downcomer, and the output end of the liquid storage device is connected to the input end of the first liquid pipe.

[0017] Further, condensation fins are provided outside the separated heat pipe double condensation end.

[0018] Further, evaporation fins are provided outside the separated heat pipe evaporation end.

[0019] Further, the filter is a primary air filter.

[0020] Further, the heat exchange core is a direct evaporation heat exchange core.

[0021] The beneficial effects of the present utility model relative to the prior art are:

[0022] The dual-condensation separated heat pipe heat exchange system of the present utility model is composed of an evaporative cooling chilled water system and a separated heat pipe heat exchange system, combining evaporative cooling technology with separated heat pipe technology. After the working medium absorbs ambient heat and heats up at the evaporation end of the separated heat pipe, it becomes a gaseous working medium, enters the first working medium layer of the dual-condensation end of the separated heat pipe through the riser pipe, exchanges heat with outdoor air for air-cooled condensation, and then enters the evaporative cooling system for water-cooled cooling of the working medium. After the temperature of the working medium is further reduced, it enters the evaporation end of the separated heat pipe, making full use of natural resources, expanding the applicable range of the separated heat pipe, improving the heat exchange efficiency of the separated heat pipe, being energy-saving and environment-friendly, having good economy, and having strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the dual-condensation separated heat pipe heat exchange system provided by the embodiment of the present application;

[0025] Figure 2 It is a schematic structural diagram of the dual-condensation end of the separated heat pipe in the dual-condensation separated heat pipe heat exchange system provided by the embodiment of the present application;

[0026] Wherein: 1 - evaporative cooling chilled water system, 2 - primary air filter, 3 - air outlet, 4 - fan, 5 - spray row, 6 - direct evaporation heat exchange core, 7 - water collecting tray, 8 - make-up water valve, 9 - cooling water pump, 10 - return water pipe, 11 - water supply pipe, 12 - riser pipe, 13 - condensation fin, 14 - first working medium layer, 15 - sleeve, 16 - cooling water layer, 17 - second working medium layer, 18 - first downcomer, 19 - dual-condensation end of the separated heat pipe, 20 - liquid storage tank, 21 - working medium pump, 22 - first working medium valve, 23 - liquid pipe, 24 - second liquid pipe, 25 - second working medium valve, 26 - second downcomer, 27 - evaporation end of the separated heat pipe, 28 - evaporation fin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] As Figures 1 to 2 shown, an embodiment of the present application provides a double-condensation separation type heat pipe heat exchange system, including an evaporative cooling chilled water system 1 and a separation type heat pipe heat exchange system;

[0029] The separation type heat pipe heat exchange system includes a separation type heat pipe double-condensation end 19 and a separation type heat pipe evaporation end 27;

[0030] The separation type heat pipe double-condensation end 19 includes a sleeve 15, a first working fluid layer 14 arranged outside the sleeve, and a cooling water layer 16 and a second working fluid layer 17 arranged inside the sleeve 15 in sequence from outside to inside;

[0031] The top of the separation type heat pipe evaporation end 27 is connected to the input end of the first working fluid layer 14 through a riser 12. The output end of the first working fluid layer 14 is sequentially connected to the input end of the second working fluid layer 17 through a first downcomer 18 and a first liquid pipe 23. A working fluid pump 21 and a first working fluid valve 22 are sequentially arranged on the first liquid pipe 23 according to the working fluid flow direction. The output end of the second working fluid layer 17 is connected to the bottom of the separation type heat pipe evaporation end 27 through a second downcomer 26;

[0032] The top of the cooling water layer 16 is connected to the inside of the evaporative cooling chilled water system 1 through a return pipe 10. The bottom of the evaporative cooling chilled water system 1 is connected to the bottom of the cooling water layer 16 through a water supply pipe 11. A cooling water pump 9 is arranged on the water supply pipe 11.

[0033] The double-condensation separated heat pipe heat exchange system of the present utility model is composed of an evaporative cooling chilled water system 1 and a separated heat pipe heat exchange system. By combining the evaporative cooling technology and the separated heat pipe technology, after the working fluid absorbs ambient heat and rises in temperature at the evaporation end 27 of the separated heat pipe, it becomes a gaseous working fluid, enters the first working fluid layer 14 of the double-condensation end 19 of the separated heat pipe through the riser pipe 12, exchanges heat with outdoor air for air-cooled condensation, and then enters the evaporative cooling chilled water system 1 to cool the working fluid by water cooling. After the temperature of the working fluid is further reduced, it re-enters the evaporation end 27 of the separated heat pipe, making full use of natural resources, expanding the applicable range of the separated heat pipe, improving the heat exchange efficiency of the separated heat pipe, being energy-saving, environmentally friendly, having good economy, and having strong practicability.

[0034] Specifically, the evaporative cooling chilled water system 1 in the embodiment of the present application includes a spray row 5 arranged on the return pipe 10, a heat exchange core 6 arranged below the spray row 5, a water collecting tray 7 arranged below the heat exchange core 6, and filters 2 arranged on both sides of the heat exchange core 6; the first port of the water collecting tray 7 is connected to the input end of the water supply pipe 11; the second port of the water collecting tray 7 is connected to a make-up water valve 8.

[0035] After the cooling water layer 16 in the sleeve 15 exchanges heat with the working fluid in the second working fluid layer 17, its temperature rises. The heated cooling water reaches the evaporative cooling chilled water system 1 through the return pipe 10, is sprayed onto the heat exchange core 6 through the spray row 5, exchanges heat with the outdoor air filtered by the filters 2 in the heat exchange core 6, the temperature of the cooling water decreases, and it falls into the water collecting tray 7. Under the action of the cooling water pump 9, it continues to circulate to the double-condensation end 19 of the separated heat pipe through the water supply pipe 11.

[0036] The connection of the water collecting tray 7 through the make-up water valve 8 can achieve the automatic make-up water function. When the water volume in the system decreases due to evaporation or other reasons, the make-up water valve 8 can automatically supplement water to the water collecting tray 7 to keep the water level in the system stable, which helps to avoid the decline of the cooling effect or the unstable operation of the system caused by too low water level.

[0037] Specifically, an air outlet 3 is arranged on the upper part of the spray row 5 in the embodiment of the present application, and a fan 4 is arranged inside the air outlet 3.

[0038] The fan 4 can generate a strong air flow above the spray row 5, which helps to quickly take away the heat in the spray row 5 and avoid overheating. In this way, it can ensure that the spray row 5 maintains an appropriate working temperature during operation and improve the cooling effect.

[0039] Specifically, the separated heat pipe heat exchange system in the embodiment of the present application further includes a second liquid pipe 24 and a second working fluid valve 25 arranged on the second liquid pipe 24. One end of the second liquid pipe 24 is connected to the output end of the working fluid pump 21, and the other end is connected to the bottom of the evaporation end 27 of the separated heat pipe.

[0040] The setting of the second liquid pipe 24 and the second working medium valve 25 brings more application scopes to the system: when the outdoor ambient temperature is relatively low, the working medium can be cooled by air cooling. At this time, the gaseous working medium enters the first working medium layer 14 through the riser pipe 12, condenses into a liquid after heat exchange with the outdoor air, the liquid working medium enters the liquid storage tank 20 through the first downcomer 18, the first working medium valve 22 is closed, the second working medium valve 25 is opened, and under the action of the working medium pump 21, it enters the evaporator end 27 of the separated heat pipe through the second liquid pipe 24 to complete the heat pipe heat exchange cycle.

[0041] Specifically, a liquid storage device 20 is arranged between the first downcomer 18 and the first liquid pipe 23 in the embodiment of the present application. The input end of the liquid storage device 20 is connected to the input end of the first downcomer 18, and the output end of the liquid storage device 20 is connected to the input end of the first liquid pipe 23.

[0042] The liquid storage device 20 can effectively balance the flow rate of the working medium in the system. It can store a certain amount of liquid working medium and release it evenly into the first liquid pipe 23 according to actual needs, so as to ensure the stable and uniform distribution of the working medium flow rate; it can also serve as a buffer zone for the flow of the working medium, reduce the pressure fluctuations caused by unstable backflow, and improve the working efficiency of the overall system.

[0043] Specifically, condensation fins 13 are arranged outside the separated heat pipe double condensation end 19 in the embodiment of the present application, and evaporation fins 28 are arranged outside the evaporator end 27 of the separated heat pipe.

[0044] The condensation fins 13 can increase the heat exchange surface area, enabling the working medium to conduct more efficient heat exchange with the cold source during the condensation process, helping to condense the working medium into a liquid faster, thereby improving the overall heat pipe performance and efficiency; the evaporation fins 28 can also expand the heat exchange surface area, enabling the working medium to conduct more efficient heat exchange with the heat source during the evaporation process, helping to transfer heat to the working medium more quickly, thereby improving the evaporation efficiency.

[0045] The embodiment of the present application does not specifically limit the selection of the filter 2 and the heat exchange core 6. Exemplarily, the filter 2 is a primary air filter, and the heat exchange core 6 is a direct evaporation heat exchange core.

[0046] As the first filtration barrier in the system, the primary air filter can effectively remove larger particulate matters in the air, such as dust, pollen, and other suspended particles. This helps to protect other components inside the system, reduce dirt accumulation, thereby extending the service life of the equipment and improving the air quality; the direct evaporation heat exchange core realizes efficient heat exchange through the direct evaporation and condensation process of the working medium. This heat exchange core has a compact structure and can achieve efficient heat transfer in a smaller space, improving the heat exchange efficiency of the system, thereby reducing energy consumption and operating costs.

[0047] The specific working process of the embodiment of this application is as follows:

[0048] When the outdoor ambient temperature is relatively low, air cooling can be used to cool the working fluid. At this time, the gaseous working fluid enters the first working fluid layer 14 through the riser pipe 12, condenses into a liquid after heat exchange with the outdoor air, and the liquid working fluid enters the liquid storage tank 20 through the first downcomer 18. The first working fluid valve 22 is closed, and the second working fluid valve 25 is opened. Under the action of the working fluid pump 21, it enters the evaporator end 27 of the separated heat pipe through the second liquid pipe 24 to complete the heat pipe heat exchange cycle.

[0049] When the outdoor ambient temperature is relatively high, measures of two-stage condensation of air cooling and water cooling for the working fluid can be taken to improve the heat pipe heat exchange efficiency. Specifically:

[0050] In the separated heat pipe heat exchange system, after the working fluid absorbs environmental heat and heats up at the evaporator end 27 of the separated heat pipe, it becomes a gaseous working fluid, enters the first working fluid layer 14 of the double condensation end 19 of the separated heat pipe through the riser pipe 12, and completes air cooling condensation through heat exchange with the outdoor air. The pre-cooled working fluid flows into the liquid storage tank 20 through the first downcomer 18. The first working fluid valve 22 is opened, and the second working fluid valve 25 is closed. Under the action of the working fluid pump 21, the working fluid enters the second working fluid layer 17 through the liquid pipe 23, and completes water cooling condensation of the heat pipe working fluid after heat exchange with the relatively low-temperature cooling water layer 16 in the sleeve 15; the condensed working fluid, under the action of gravity, enters the evaporator end 27 of the separated heat pipe through the second downcomer 26 to complete the heat pipe heat exchange cycle;

[0051] In the evaporative cooling chilled water system 1, the temperature of the cooling water layer 16 in the sleeve 15 rises after heat exchange with the working fluid in the second working fluid layer 17. The heated cooling water reaches the evaporative cooling chilled water system through the return pipe 10, is sprayed onto the heat exchange core 6 through the spray row 5, and exchanges heat with the outdoor air passing through the filter 2 in the heat exchange core 6. After that, the temperature of the cooling water decreases, falls into the water collecting tray 7, and under the action of the cooling water pump 9, continues to circulate to the double condensation end 19 of the separated heat pipe through the water supply pipe 11.

[0052] It can be seen that a double condensation separated heat pipe heat exchange system of the present utility model is composed of an evaporative cooling chilled water system 1 and a separated heat pipe heat exchange system. It combines the evaporative cooling technology and the separated heat pipe technology. After the working fluid absorbs environmental heat and heats up at the evaporator end 27 of the separated heat pipe, it becomes a gaseous working fluid, enters the first working fluid layer 14 of the double condensation end 19 of the separated heat pipe through the riser pipe 12, conducts air cooling condensation through heat exchange with the outdoor air, and then enters the evaporative cooling chilled water system 1 to conduct water cooling of the working fluid, so that the temperature of the working fluid is further reduced and then re-enters the evaporator end 27 of the separated heat pipe. It makes full use of natural resources, expands the applicable range of the separated heat pipe, improves the heat exchange efficiency of the separated heat pipe, is energy-saving and environmentally friendly, has good economy, and has strong practicability.

[0053] It should be noted that for those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any perspective, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0054] Specific examples are used in the present utility model to elaborate on the principles and implementation manners of the present utility model. The above description is only the preferred implementation manner of the present utility model and is not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made without departing from the principles and spirit of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A double condensation separation heat pipe heat exchange system, characterized in that: It includes an evaporative cooling cold water system (1) and a separate heat pipe heat exchange system; The separate heat pipe heat exchange system comprises a separate heat pipe double condensation end (19) and a separate heat pipe evaporation end (27); The separated heat pipe double condensation end (19) comprises a casing (15), a first working medium layer (14) arranged outside the casing, and a cooling water layer (16) and a second working medium layer (17) arranged in sequence from outside to inside in the casing (15); The top of the separated heat pipe evaporation end (27) is connected to the input end of the first working fluid layer (14) through a rising pipe (12); the output end of the first working fluid layer (14) is connected to the input end of the second working fluid layer (17) through a first descending pipe (18) and a first liquid pipe (23) in sequence; a working fluid pump (21) and a first working fluid valve (22) are provided on the first liquid pipe (23) in sequence according to the working fluid flow direction; the output end of the second working fluid layer (17) is connected to the bottom of the separated heat pipe evaporation end (27) through a second descending pipe (26); The top of the cooling water layer (16) is connected to the interior of the evaporative cooling cold water system (1) via a return pipe (10), and the bottom of the evaporative cooling cold water system (1) is connected to the bottom of the cooling water layer (16) via a water supply pipe (11), and a cooling water pump (9) is provided on the water supply pipe (11).

2. The double condensation separation heat pipe heat exchange system according to claim 1, characterized in that: The evaporative cooling cold water system (1) comprises a spray row (5) arranged on the return water pipe (10), a heat exchange core (6) arranged below the spray row (5), a water collection tray (7) arranged below the heat exchange core (6), and filters (2) arranged on both sides of the heat exchange core (6); The first port of the water collecting tray (7) is connected to the input end of the water supply pipe (11).

3. The double condensation separation heat pipe heat exchange system according to claim 2, characterized in that: The second port of the water collecting tray (7) is connected to the water supply valve (8).

4. The double condensation separation heat pipe heat exchange system according to claim 2, characterized in that: An air outlet (3) is arranged on the upper part of the spray row (5), and a fan (4) is arranged inside the air outlet (3).

5. The double condensation separation heat pipe heat exchange system according to claim 3, characterized in that: The separate heat pipe heat exchange system further comprises a second liquid pipe (24) and a second working fluid valve (25) arranged on the second liquid pipe (24); one end of the second liquid pipe (24) is connected to the output end of the working fluid pump (21), and the other end is connected to the bottom of the evaporation end (27) of the separate heat pipe.

6. The double condensation separation heat pipe heat exchange system according to claim 1, characterized in that: A liquid storage device (20) is provided between the first downcomer (18) and the first liquid pipe (23); an input end of the liquid storage device (20) is connected to the input end of the first downcomer (18), and an output end of the liquid storage device (20) is connected to the input end of the first liquid pipe (23).

7. The double condensation separation heat pipe heat exchange system according to claim 1, characterized in that: Condensation fins (13) are arranged outside the double condensation end (19) of the separate heat pipe.

8. The double condensation separation heat pipe heat exchange system according to claim 1, characterized in that: An evaporation fin (28) is arranged outside the evaporation end (27) of the separate heat pipe.

9. The double condensation separation heat pipe heat exchange system according to claim 2, characterized in that: The filter (2) is a primary air filter.

10. The double condensation separation heat pipe heat exchange system according to claim 2, characterized in that: The heat exchange core (6) is a direct evaporation heat exchange core.

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