CN218723412U - Low-temperature differential separation type loop heat pipe exchanger based on film evaporation - Google Patents
Low-temperature differential separation type loop heat pipe exchanger based on film evaporation Download PDFInfo
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- CN218723412U CN218723412U CN202222772823.9U CN202222772823U CN218723412U CN 218723412 U CN218723412 U CN 218723412U CN 202222772823 U CN202222772823 U CN 202222772823U CN 218723412 U CN218723412 U CN 218723412U
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Abstract
The utility model relates to a low temperature difference from formula loop heat pipe exchanger based on film evaporation, including first plate fin radiator and second plate fin radiator, first plate fin radiator is equipped with a plurality of first flat heat exchange tubes, and second plate fin radiator is equipped with a plurality of second flat heat exchange tubes; working media are filled in the second flat heat exchange tubes, and the amount of the filled working media is 1/8-1/4 of the height of the second flat heat exchange tubes; the inner walls of the first flat heat exchange tube and the second flat heat exchange tube are provided with capillary microstructures. The utility model discloses disconnect-type loop heat pipe exchanger has prepared capillary microstructure in flat heat exchange tube, has effectively improved the capillary ability of flat heat exchange tube, makes liquid working medium form the film state at flat heat exchange tube inner wall, has promoted the ability of climbing of liquid working medium and the backward flow ability when cooling, and working medium phase transition efficiency is higher, has strengthened heat transfer capacity to the difference in temperature between messenger's evaporimeter and the condenser is lower.
Description
Technical Field
The utility model relates to a disconnect-type loop heat pipe exchanger technical field specifically is a low temperature difference separates formula loop heat pipe exchanger based on film evaporation.
Background
The industrial energy consumption accounts for more than 70% of the total energy consumption of China, wherein more than 50% of the industrial energy consumption is converted into industrial waste heat, the recyclable waste heat resources account for about 60% of the total waste heat resources, the utilization rate of the industrial waste heat in China only reaches about 30%, and the method has important research value and remarkable economic effect on further full utilization of the industrial waste heat.
The separated heat pipe exchanger is developed as one single pipe heat pipe exchanger, and has evaporation section and condensation section as two parts of one heat pipe and several single pipes. The split heat pipe heat exchanger is different in that the evaporation section and the condensation section of the split heat pipe heat exchanger are not formed by separate heat pipe elements, but are separated into two parts, which form two heat exchangers: an evaporator and a condenser; the evaporator is at the lower part and the condenser is at the upper part. The vapor generated by boiling in the evaporator flows to the condenser at the upper part for condensation, the condensed liquid flows back to the evaporator, and the continuous transfer of heat is completed by means of the continuous phase change of the internal medium. The separated heat pipe heat exchanger is flexible in arrangement and random in change, can realize remote heat exchange, can realize simultaneous heat exchange of one fluid or a plurality of fluids, and can completely isolate two or more heat exchange fluids, so that the separated heat pipe heat exchanger is particularly suitable for waste heat recovery and energy conservation and emission reduction.
In the prior art, a split heat pipe heat exchanger comprises two plate-type fin radiators, a steam channel and a condensate return channel; the plate-type fin radiator comprises a working medium collecting pipe, a steam collecting pipe, and a plurality of flat heat exchange pipes and fins which are arranged between the working medium collecting pipe and the steam collecting pipe, wherein liquid working media are arranged in the working medium collecting pipe and the flat heat exchange pipes; one of the two plate-type fin radiators is used as a condenser, the other plate-type fin radiator is used as an evaporator, the condenser is arranged above the evaporator, a working medium collecting pipe of the evaporator is connected with a working medium collecting pipe of the condenser through a condensate return channel, a steam collecting pipe of the evaporator is connected with a steam collecting pipe of the condenser through a steam channel, and a natural circulation loop is formed after the two plate-type fin radiators are connected.
It has the following technical problems:
the usage amount of working media in a flat heat exchange tube of the conventional separated heat pipe exchanger is large, the working media are in a pool boiling state during evaporation, generated partial bubbles are difficult to break through a liquid thickness barrier to reach the liquid level, the phase change of the working media is difficult, and in addition, the evaporator and the condenser are separated by a certain distance and often reach 1-2 meters far, so that a large temperature difference is generated between the evaporator and the condenser, and the heat exchange capacity of the separated heat pipe exchanger is influenced.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model aims at: the low-temperature differential separation type loop heat pipe exchanger based on film evaporation is provided, the using amount of working media is small, the phase change of the working media is easier to occur, the heat exchange capacity is enhanced, and the lower integral temperature difference is realized.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model relates to a low temperature difference separating loop heat pipe exchanger based on film evaporation, which comprises a first plate type fin radiator and a second plate type fin radiator, wherein the first plate type fin radiator is arranged above the second plate type fin radiator; one end of the first plate type fin radiator is provided with a first working medium collecting pipe, the other end of the first plate type fin radiator is provided with a first steam collecting pipe, and a plurality of first flat heat exchange pipes are arranged between the first working medium collecting pipe and the first steam collecting pipe; a second working medium collecting pipe is arranged at one end of the second plate type fin radiator, a second steam collecting pipe is arranged at the other end of the second plate type fin radiator, and a plurality of second flat heat exchange pipes are arranged between the second working medium collecting pipe and the second steam collecting pipe; the first working medium collecting pipe is connected with the second working medium collecting pipe, and the first steam collecting pipe is connected with the second steam collecting pipe; working media are filled in the second flat heat exchange tube, and the filling working media have the mass of 1/8-1/4 of the height of the second flat heat exchange tube; the inner walls of the first flat heat exchange tube and the second flat heat exchange tube are provided with capillary microstructures.
Further, the lengths of the first flat heat exchange tube and the second flat heat exchange tube are arranged corresponding to the climbing distance of the maximum capillary force of the capillary microstructure.
Further, the angle of the second plate-type fin radiator is 0-60 degrees.
Further, the capillary microstructure is a chemically etched, plowed extruded groove, or sintered wick.
Further, the groove is triangular, rectangular or inverted trapezoidal; the liquid absorbing core is formed by sintering metal powder or glass fiber.
Further, the distance between the adjacent first flat heat exchange tubes or the adjacent second flat heat exchange tubes is 4-10mm.
Furthermore, fins are arranged between the first flat heat exchange tubes or between the second flat heat exchange tubes, and the fins are square, corrugated or spiral; the fin interval is 1-3mm, the thickness is 0.1-0.5mm, the material is aluminum material.
The first working medium collecting pipe is connected to the second working medium collecting pipe through the condensate return channel, the first steam collecting pipe is connected to the second steam collecting pipe through the steam channel, and the steam channel and the condensate return channel are copper pipes or air-conditioning pipes; the inner diameter of the steam channel is 8-20mm, and the inner diameter of the condensate return channel is 6-15mm.
Further, the second working medium collecting pipe is provided with an air exhaust and liquid filling valve.
In general, the utility model has the advantages as follows:
the utility model discloses disconnect-type loop heat pipe exchanger has all prepared the capillary microstructure in first flat heat exchange tube and the flat heat exchange tube of second, has effectively improved the capillary ability of first flat heat exchange tube and the flat heat exchange tube of second, and less working medium forms the film state at first flat heat exchange tube and the flat heat exchange tube of second intraductal wall, and working medium phase transition efficiency is higher, has strengthened heat transfer capacity to make the difference in temperature between first plate fin radiator and the second plate fin radiator lower. Meanwhile, after the working medium in the second plate type fin radiator is vaporized, the working medium is transmitted to the first plate type fin radiator above the second plate type fin radiator to be condensed and flows back into the second plate type fin radiator, the working medium usage amount is small because the filling working quality in the second plate type fin radiator is only 1/8-1/4 of the height of the second flat heat exchange tube, the working medium on the inner walls of the first flat heat exchange tube and the second flat heat exchange tube is in a film evaporation state, the liquid working medium filling amount required for achieving better heat exchange efficiency is far lower than that of a common heat tube heat exchanger, the liquid working medium is saved, and the heat exchange efficiency is more energy-saving and environment-friendly.
Drawings
Fig. 1 is the overall schematic diagram of the split-type loop heat pipe exchanger of the present invention.
Fig. 2 is a schematic diagram of capillary microstructures on the inner walls of the first flat heat exchange tube and the second flat heat exchange tube.
In the figure:
the heat exchanger comprises a heat exchanger body, a first plate type fin radiator, a second plate type fin radiator, a first steam collecting pipe, a first working medium collecting pipe, a second heat exchanger, a first flat heat exchange pipe, a fin, a 6 steam channel, a condensate return channel, a 8 second plate type fin radiator, a 9 second steam collecting pipe, a 10 second working medium collecting pipe, a 11 second flat heat exchange pipe, a 12 air extracting and liquid filling valve and a 13 capillary microstructure.
Detailed Description
The utility model provides a low temperature difference separation formula loop heat pipe exchanger based on film evaporation compares in other traditional separation formula loop heat pipe exchanger, the utility model discloses can form film evaporation's state at flat heat exchange tube inner wall to make the whole lower difference in temperature that realizes of separation formula loop heat pipe exchanger, and practice thrift the working medium more, have wide development prospect in industrial fields such as waste heat recovery.
The present invention will be described in further detail below.
As shown in fig. 1 and 2, a low-temperature differential separation type loop heat pipe heat exchanger based on thin film evaporation comprises a first plate-type fin radiator 1 and a second plate-type fin radiator 8, wherein the first plate-type fin radiator 1 is arranged above the second plate-type fin radiator 8; one end of the first plate type fin radiator 1 is provided with a first working medium collecting pipe 3, the other end of the first plate type fin radiator is provided with a first steam collecting pipe 2, and a plurality of first flat heat exchange pipes 4 are arranged between the first working medium collecting pipe 3 and the first steam collecting pipe 2; one end of the second plate type fin radiator 8 is provided with a second working medium collecting pipe 10, the other end of the second plate type fin radiator is provided with a second steam collecting pipe 9, and a plurality of second flat heat exchange pipes 11 are arranged between the second working medium collecting pipe 10 and the second steam collecting pipe 9; the first working medium collecting pipe 3 is connected with the second working medium collecting pipe 10, and the first steam collecting pipe 2 is connected with the second steam collecting pipe 9; working media are filled in the second flat heat exchange tube 11, and the filling working media have the mass which is 1/8-1/4 of the height of the second flat heat exchange tube 11; the inner walls of the first flat heat exchange tube 4 and the second flat heat exchange tube 11 are both provided with capillary microstructures 13.
Specifically, the first plate-fin radiator 1 and the second plate-fin radiator 8 function as a condenser and an evaporator, respectively; when the evaporator is heated, the liquid working medium in the evaporator is heated to change phase and take away heat, at the moment, the working medium is converted from liquid into gas and rises to the condenser, the working medium is cooled at the condenser end, the working medium is converted from gas into liquid and flows back to the evaporator end to continuously participate in phase change, the heat is taken away in a circulating mode, and effective heat dissipation is achieved.
The evaporator and the condenser are placed in the air duct to operate, so that a large enough heat exchange area is ensured, and the heat exchange efficiency is ensured. The heat source can be hot air or hot liquid, and the cold source can be cold air or cold liquid.
Specifically, the lengths of the first flat heat exchange tube 4 and the second flat heat exchange tube 11 are set corresponding to the climbing distance of the maximum capillary force of the capillary microstructure 13, so that a liquid working medium can climb from the first working medium collecting tube 3 to the first steam collecting tube 2 and climb from the second working medium collecting tube 10 to the second steam collecting tube 9, a film state is effectively formed on the inner walls of the first flat heat exchange tube 4 and the second flat heat exchange tube 11, heat can be transferred more effectively, and a lower temperature difference is obtained between the first plate-type fin radiator 1 and the second plate-type fin radiator 8.
Specifically, the second plate-fin heat sink 8 is placed at an angle of 0 to 60 °. In order to ensure that the capillary height meets the requirement, the second plate type fin radiator 8 can be obliquely placed, and the placing angle is preferably 30 degrees
Specifically, capillary microstructure 13 is a chemically etched, plowed extruded groove, or sintered wick.
The shape of the groove formed by chemical etching and plowing extrusion is triangular, rectangular or inverted trapezoidal.
Preferably, the extrusion grooves are cut by ploughs and are triangular, and the depth of the grooves is 0.15mm.
The liquid absorption core is formed by sintering metal powder or glass fiber and is triangular, rectangular or inverted trapezoidal in shape.
Preferably, the material of the sintered wick is copper powder.
Specifically, the distance between the adjacent first flat heat exchange tubes 4 or the adjacent second flat heat exchange tubes 11 is 4-10mm, in order to ensure the heat exchange effect, a plurality of rows of tubes can be adopted, the preferred number of rows is 2-4, and two adjacent rows of tubes are arranged at intervals.
The diameters of the first flat heat exchange tube 4 and the second flat heat exchange tube 11 are 4-10mm, the material is preferably red copper so as to ensure good heat transfer effect, and the first flat heat exchange tube and the second flat heat exchange tube can also be made of aluminum or stainless steel.
Preferably, the first and second flat heat exchange tubes 4 and 11 have a diameter of 6mm or 8mm.
Specifically, fins 5 are arranged between the first flat heat exchange tubes 4 or between the second flat heat exchange tubes 11, and the shape of each fin 5 is square, corrugated or spiral; the fins 5 are in interference fit between the first flat heat exchange tubes 4 or between the second flat heat exchange tubes 11 so as to ensure good heat recovery efficiency, the distance between the fins 5 is 1-3mm, the thickness is 0.1-0.5mm, and the material is aluminum.
Preferably, the fins 5 are 1mm apart and 0.2mm thick, and are made of aluminum.
Specifically, a steam passage 6 and a condensate return passage 7 are also included. As shown in fig. 1, the right end of the first working medium collecting pipe 3 is connected to the right end of the second working medium collecting pipe 10 through a condensate return passage 7, the left end of the first steam collecting pipe 2 is connected to the left end of the second steam collecting pipe 9 through a steam passage 6, and the steam passage 6 and the condensate return passage 7 are copper pipes or air conditioning pipes; the inner diameter of the steam channel 6 is 8-20mm, and the inner diameter of the condensate return channel 7 is 6-15mm, so that small air resistance is realized, and the pressure difference of a loop is maintained.
Specifically, the second working medium collecting pipe 10 is provided with an air-extracting and liquid-filling valve 12.
Liquid working medium is injected into the second working medium collecting pipe 10 through the air-extracting and liquid-filling valve 12, vacuum-pumping operation is carried out through the air-extracting and liquid-filling port, and then the air-extracting and liquid-filling valve 12 is sealed.
The utility model discloses capillary microstructure 13 has been prepared between first flat heat exchange tube 4 and on the 11 inner walls of second flat heat exchange tube, has realized the film boiling state to make the difference in temperature between evaporimeter and the condenser littleer, strengthened heat transfer capacity.
And simultaneously, the utility model discloses the required liquid filling volume of film boiling state that realizes is littleer, is far less than ordinary heat pipe exchanger 1/2-2/3's liquid filling volume, only needs 1/8-1/4, practices thrift working medium more, and is energy-concerving and environment-protective.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a low temperature difference separates formula loop heat pipe heat exchanger based on film evaporation which characterized in that: the radiator comprises a first plate type fin radiator and a second plate type fin radiator, wherein the first plate type fin radiator is arranged above the second plate type fin radiator; one end of the first plate type fin radiator is provided with a first working medium collecting pipe, the other end of the first plate type fin radiator is provided with a first steam collecting pipe, and a plurality of first flat heat exchange pipes are arranged between the first working medium collecting pipe and the first steam collecting pipe; a second working medium collecting pipe is arranged at one end of the second plate type fin radiator, a second steam collecting pipe is arranged at the other end of the second plate type fin radiator, and a plurality of second flat heat exchange pipes are arranged between the second working medium collecting pipe and the second steam collecting pipe; the first working medium collecting pipe is connected with the second working medium collecting pipe, and the first steam collecting pipe is connected with the second steam collecting pipe; working media are filled in the second flat heat exchange tube, and the filling working media have the mass of 1/8-1/4 of the height of the second flat heat exchange tube; the inner walls of the first flat heat exchange tube and the second flat heat exchange tube are provided with capillary microstructures.
2. The low temperature differential separation loop heat pipe exchanger based on thin film evaporation as claimed in claim 1, wherein: the lengths of the first flat heat exchange tube and the second flat heat exchange tube are arranged corresponding to the climbing distance of the maximum capillary force of the capillary microstructure.
3. The low temperature differential separation loop heat pipe exchanger based on thin film evaporation as claimed in claim 1, wherein: the angle of the second plate type fin radiator is 0-60 degrees.
4. The low temperature differential separation loop heat pipe exchanger based on thin film evaporation as claimed in claim 1, wherein: the capillary microstructure is a chemical etching, plowing and extruding groove, or sintering liquid absorption core.
5. The low temperature differential separation loop heat pipe exchanger based on thin film evaporation as claimed in claim 4, wherein: the groove is triangular, rectangular or inverted trapezoidal; the liquid absorbing core is formed by sintering metal powder or glass fiber.
6. The low temperature differential separation loop heat pipe exchanger based on thin film evaporation as claimed in claim 1, wherein: the distance between the adjacent first flat heat exchange tubes or the adjacent second flat heat exchange tubes is 4-10mm.
7. The low temperature differential separation loop heat pipe exchanger based on thin film evaporation as claimed in claim 1, wherein: fins are arranged between the first flat heat exchange tubes or between the second flat heat exchange tubes, and the fins are square, corrugated or spiral; the distance between the fins is 1-3mm, the thickness is 0.1-0.5mm, and the material is aluminum.
8. The low temperature differential separation loop heat pipe exchanger based on thin film evaporation as claimed in claim 1, wherein: the first working medium collecting pipe is connected to the second working medium collecting pipe through the condensate return channel, the first steam collecting pipe is connected to the second steam collecting pipe through the steam channel, and the steam channel and the condensate return channel are copper pipes or air-conditioning pipes; the inner diameter of the steam channel is 8-20mm, and the inner diameter of the condensate return channel is 6-15mm.
9. The low-temperature differential separation type loop heat pipe exchanger based on thin film evaporation as claimed in claim 1, wherein: and the second working medium collecting pipe is provided with an air-extracting and liquid-filling valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222772823.9U CN218723412U (en) | 2022-10-21 | 2022-10-21 | Low-temperature differential separation type loop heat pipe exchanger based on film evaporation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222772823.9U CN218723412U (en) | 2022-10-21 | 2022-10-21 | Low-temperature differential separation type loop heat pipe exchanger based on film evaporation |
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| Publication Number | Publication Date |
|---|---|
| CN218723412U true CN218723412U (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222772823.9U Active CN218723412U (en) | 2022-10-21 | 2022-10-21 | Low-temperature differential separation type loop heat pipe exchanger based on film evaporation |
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| CN (1) | CN218723412U (en) |
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- 2022-10-21 CN CN202222772823.9U patent/CN218723412U/en active Active
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