CN215864822U - Variable-diameter pulsating heat pipe phase-change heat storage device - Google Patents
Variable-diameter pulsating heat pipe phase-change heat storage device Download PDFInfo
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- CN215864822U CN215864822U CN202121845892.7U CN202121845892U CN215864822U CN 215864822 U CN215864822 U CN 215864822U CN 202121845892 U CN202121845892 U CN 202121845892U CN 215864822 U CN215864822 U CN 215864822U
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Abstract
The utility model provides a variable-diameter pulsating heat pipe phase-change heat storage device which comprises a shell, a heating chamber, a heat storage chamber, a condensation chamber and a variable-diameter pulsating heat pipe. The heating chamber, the heat storage chamber, the condensing chamber and the variable-diameter pulsating heat pipe are all arranged in the shell. The diameters of the variable-diameter pulsating heat pipes in the three chambers are different. The heating chamber is arranged at the lower part of the shell, the heat storage chamber is arranged at the middle part of the shell, and the condensing chamber is arranged at the upper part of the shell. Two holes are formed in the side part of the heating chamber to connect pipelines for hot working medium fluid to enter and discharge; two holes are formed in the side part of the condensation chamber and connected with pipelines for cold working medium fluid to enter and discharge. A square hole is formed in the heat storage chamber for the phase change material to be put in and taken out, and the phase change of the phase change material in the heat storage chamber is utilized to realize the absorption, storage, transfer and release of heat, so that the heat energy is repeatedly and effectively utilized.
Description
Technical Field
The utility model relates to the field of new energy power energy storage, in particular to a high-performance heat storage and release technical device based on a variable-diameter pulsating heat pipe.
Background
With the rapid development of the world industry, the increasing consumption of fossil energy such as coal and the like, the problems of global warming, energy crisis and the like are raised, and the problems even directly affect the survival of human beings, animals and plants. Under the background, energy conservation and environmental protection, new energy sources and new power for replacing fossil energy sources such as coal and the like are necessarily developed in the future. The pulsating heat pipe technology is a high-efficiency heat transfer device, and in a small capillary diameter, a vacuum-sealed working medium forms air plugs and liquid plugs which are distributed at intervals in a pipe. The liquid plug is heated and gasified in the heating section, the air plug is heated and expanded, and the air plug is cooled and liquefied in the condensing section, so that the pressure in the pipe is uneven, and the gas and liquid plugs in the pipe can generate self-excitation reciprocating agitation, thereby achieving the effect of strengthening heat transfer. The strong heat conduction effect of the pulsating heat pipe not only shows that the pulsating heat pipe can transfer large heat flow under small temperature difference, but also can play a role in leveling temperature, and the advantage enables the pulsating heat pipe to be widely applied in engineering.
Application No. CN206862181U discloses a movable heat storage and release device based on pulsating heat pipes, which aims to store waste heat, but fails to consider intensified heat transfer, i.e. intensified heat transfer in the heat storage region to improve the performance of the device, and loses part of the heat.
Application No. 200510001979.5 discloses a method for heat transfer of a variable cross-section reinforced self-oscillation heat pipe, which aims to enhance heat exchange, but fails to consider the storage of heat energy, resulting in a certain waste of energy.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a phase change heat storage device of a variable-diameter pulsating heat pipe, and aims to provide a device capable of storing and releasing heat, aiming at solving the defects that other devices are not strong in heat exchange capacity and incapable of storing heat exchanged, the device adopts the variable-diameter pulsating heat pipe, and the Fourier law is adopted
Therefore, the heat flow is enhanced by increasing the area A, and the heat exchange efficiency is enhanced; the heat storage chamber is arranged in the device, so that heat energy can be stored, waste of the heat energy is avoided to the greatest extent, and the defects of devices of other people are overcome. The device can use a proper phase-change material, and the latent heat of the phase-change material is utilized to store heat so as to finish the storage and release of heat energy.
The technical scheme adopted by the utility model is as follows:
the utility model provides a phase change heat storage device of variable diameter pulsating heat pipe which characterized in that: the device comprises a shell, a heating chamber, a regenerative chamber and a condensing chamber. The heating chamber and the condensing chamber are provided with guide plates for arranging a fluid path and enhancing the heat exchange capacity. The flow guide plates are uniformly arranged in the cooling chamber, so that the cooling working medium flows through each elbow in turn according to an S-shaped path, the contact time of the cooling working medium and the pipe wall of the pulsating heat pipe is prolonged, and the purpose of sufficient heat exchange is achieved. The guide plates are uniformly arranged in the heating chamber, so that the heating working medium flows through each elbow in turn according to an S-shaped path, the contact time of the heating working medium and the pipe wall of the pulsating heat pipe is prolonged, and the purpose of sufficient heat exchange is achieved.
The heating working medium can be gas or liquid, and the temperature of the heating working medium is higher than the melting temperature of the phase-change material of the heat storage chamber.
The cooling medium can be a gas or a liquid. The temperature of the cooling working medium is lower than the condensation temperature of the phase-change material of the heat storage chamber.
The variable-diameter pulsating heat pipe is positioned in the shell, the inner diameter of the variable-diameter pulsating heat pipe in the heating chamber is 2-4 mm, the inner diameter of the variable-diameter pulsating heat pipe in the regenerator is 4-6 mm, and the inner diameter of the variable-diameter pulsating heat pipe in the condensing chamber is 2-4 mm. The heating chamber, the heat storage chamber and the condensing chamber are all separated by stainless steel plates. The straight pipe of the variable-diameter pulsating heat pipe is positioned in the regenerator, and the straight pipe and the bent pipe are positioned in the heating chamber and the condensation chamber.
The phase-change heat storage material such as barium hydroxide octahydrate, sodium chloride, lauryl alcohol and the like can be added into the heat storage chamber of the variable-diameter pulsating heat pipe phase-change heat storage device, and the phase-change heat storage device can be used for storing heat in the variable-diameter pulsating heat pipe due to the fact that the phase-change material has a large latent heat value.
The variable-diameter pulsating heat pipe phase-change heat storage device is characterized in that the variable-diameter part and the bent pipe of the variable-diameter pulsating heat pipe phase-change heat storage device are welded or integrally cast at the junction of the straight pipes to form a closed loop, so that the variable-diameter pulsating heat pipe phase-change heat storage device is good in air tightness and can maintain vacuum.
The filling rate of the working medium in the variable-diameter pulsating heat pipe is not higher than seventy percent, if the filling rate is too high, the pulsating effect cannot be achieved, if the filling rate of the working medium in the variable-diameter pulsating heat pipe is not lower than thirty percent, if the filling rate is too low, dry burning in the pipe is easily caused, and the pipeline is damaged.
From the compatibility perspective, the material of the variable-diameter pulsating heat pipe phase-change heat storage device generally selects stainless steel or red copper as the base material of the variable-diameter pulsating heat pipe to meet the requirement of corrosion resistance.
From the compatibility perspective, the material of the variable-diameter pulsating heat pipe phase-change heat storage device generally selects stainless steel as the base material of the variable-diameter pulsating heat pipe shell to meet the requirement of corrosion resistance.
When the variable-diameter pulsating heat pipe phase-change heat storage device is used, heat is transmitted through the following three steps:
step one, heat absorption: and opening the inlet and outlet of the heating chamber and closing the inlet and outlet of the condensing chamber. Heating working medium enters through the inlet of the heating chamber, and the entering heat exchanges heat through two ways, namely: the heat enters the stainless steel partition plate of the heating chamber and the heat storage chamber to conduct heat conduction and heat exchange, and the second way is as follows: after the heat enters the pulsating heat pipe to exchange heat with the working medium in the pulsating heat pipe, the working medium in the pulsating heat pipe is gasified, and convective heat exchange is carried out in the pipe. The two ways are to bring heat into the heat storage chamber and utilize the phase-change material to store heat.
Step two, heat conduction and storage: the diameter of the working medium in the variable-diameter pulsating heat pipe is increased from the heating section to the heat storage end, and is reduced from the heat storage end to the condensation section. The variable-diameter pulsating heat pipe has different pipe diameters and different curvature radiuses, so that the tension of a liquid film in the pipe is different, the capillary force is different, additional driving force is caused to conduct heat, heat exchange is enhanced, heat flux density is increased, and strong heat conduction is conducted.
The variable-diameter pulsating heat pipe comprises a heat storage chamber, a phase-change material, a variable-diameter pulsating heat pipe and a variable-diameter pulsating heat pipe, wherein the variable-diameter pulsating heat pipe is connected with the heat storage chamber through a pipeline, the variable-diameter pulsating heat pipe is connected with the pipeline through a pipeline, and the pipeline is connected with the pipeline.
Step three, releasing heat: and closing the inlet and outlet of the heating chamber and opening the inlet and outlet of the condensing chamber. Cooling working medium enters through an inlet of the condensing chamber, and heat is exchanged through two ways, namely: heat is exchanged with a stainless steel partition plate of the condensing chamber through the heat storage chamber; the second way is as follows: after heat is exchanged with the working medium in the pulsating heat pipe, the working medium in the variable-diameter pulsating heat pipe is rapidly condensed and liquefied due to the large temperature difference between the cooling working medium and the working medium in the variable-diameter pulsating heat pipe, and flows back to the heating chamber of the variable-diameter pulsating heat pipe under the dual actions of gravity and variable tension. During condensation, the phase change material releases heat, and the phase change material releases heat through three stages of sensible heat release, latent heat release and sensible heat release. The three steps are repeated, the energy stored by latent heat storage of the phase-change material is released into the cooling working medium, the value of industrial waste heat is exerted, and the requirement of energy conservation and environmental protection for searching new energy is met.
The utility model has the following beneficial effects: the variable-diameter pulsating heat pipe further strengthens heat exchange by using the additional force of the uneven capillary force and the uneven tension distributed in the variable-diameter generating pipe, and eliminates the additional parts such as a pipe core, an air storage chamber and the like of the traditional heat pipe by using the vacuum characteristic of the pulsating heat pipe, thereby reducing the failure rate of the heat pipe and improving the efficiency. The device utilizes the evaporation and condensation of working media in the variable-diameter pulsating heat pipe to exchange heat with the phase-change material in the heat storage chamber; latent heat of the phase-change material is utilized for heat storage, so that energy is transferred in space; the heat exchange is enhanced by utilizing the variable diameter, so that the efficiency of the device is increased; latent heat of the phase-change material is utilized for heat storage, and the heat storage capacity is large. The variable-diameter pulsating heat pipe does not need input of external work, and has the advantages of simple structure, easy maintenance, high heat storage density, strong heat exchange capability, high cost performance, cost saving, small volume, convenient use for users and the like.
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and examples.
Description of the drawings:
FIG. 1 is a front view of a variable diameter pulsating heat pipe phase change thermal storage device of the present invention;
FIG. 2 is a side view of a variable diameter pulsating heat pipe phase change thermal storage device of the present invention;
fig. 3 is a perspective view of a variable diameter pulsating heat pipe phase change thermal storage device of the present invention.
Detailed Description
The present invention will be better understood and appreciated more fully when considered in conjunction with the accompanying drawings. The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure.
FIG. 1 is a front view of a variable diameter pulsating heat pipe apparatus of the present invention; names of components in FIG. 1: in the figure, 1, a heating chamber, 2, a partition board of the heating chamber and a regenerative chamber, 3, a regenerative chamber, 4, a variable-diameter pulsating heat pipe, 5, a partition board of the regenerative chamber and a condensation chamber, 6, a condensation chamber, 7, a guide plate of the condensation chamber, 8, a diameter reduction part of the pulsating heat pipe of the regenerative chamber and the condensation chamber, 9, an inlet and an outlet filled with phase change materials, 10, a diameter increase part of the pulsating heat pipe of the heating chamber and the regenerative chamber, 11, a guide plate of the heating chamber, 12 and a shell are adopted.
FIG. 2 is a side view of a variable diameter pulsating heat pipe apparatus of the present invention; parts names in fig. 2: in the figure, 13, a heating working medium inlet, 14, a cooling working medium inlet, 15, a vacuum meter interface, 16, a vacuum pumping pump interface, 17, a cooling working medium outlet, 18 and a heating working medium outlet.
FIG. 3 is a perspective view of a variable diameter pulsating heat pipe apparatus of the present invention; in the figure, 8, the diameter of the pulsating heat pipe of the heat storage chamber and the condensation chamber is reduced, and 10, the diameter of the pulsating heat pipe of the heating chamber and the heat storage chamber is increased.
In the utility model, the type of the working medium in the variable-diameter pulsating heat pipe is selected according to the temperature of the hot fluid in the heating chamber 3. The phase change material of the regenerator should be selected according to the temperature of the hot fluid in the heating chamber 3 and the temperature of the condensing chamber 6, the melting point of the phase change material of the regenerator should be lower than that of the heating chamber 3, and the freezing point of the phase change material of the regenerator should be higher than that of the heating chamber 6. Therefore, a user can select the working medium in the variable-diameter pulsating heat pipe and the phase-change material in the heat storage chamber as required.
The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (3)
1. The utility model provides a variable diameter pulsating heat pipe phase transition heat storage device which characterized in that: the device comprises a shell, a heating chamber, a regenerative chamber and a condensing chamber; the heating chamber, the heat storage chamber, the condensing chamber and the variable-diameter pulsating heat pipe are all positioned in the shell; the heating chamber is arranged at the lower part of the shell, the heat storage chamber is arranged at the middle part of the shell, and the condensing chamber is arranged at the upper part of the shell; two holes are formed in the side part of the heating chamber to connect pipelines for hot working medium fluid to enter and discharge; two holes are formed in the side part of the condensation chamber to connect pipelines for cold working medium fluid to enter and discharge; a square hole is formed in the regenerator for the phase-change material to be put in and taken out; the heating chamber comprises a hot working medium guide plate, and the hot working medium enters from the opening inlet of the heating chamber, then flows along an S-shaped route according to the guide plate and flows out from the opening outlet; the condensing chamber comprises a cold working medium guide plate, and cold working medium enters from the opening inlet of the condensing chamber, then flows along an S-shaped route according to the guide plate and flows out from the opening outlet; the heating chamber and the heat storage chamber are separated by a stainless steel plate; the heat accumulation chamber and the condensation chamber are separated by a stainless steel plate.
2. The variable diameter pulsating heat pipe phase change thermal storage device of claim 1, wherein: the inner diameter of the variable-diameter pulsating heat pipe in the heating chamber is 2-4 mm, the inner diameter of the regenerator pipe is 4-6 mm, and the inner diameter of the condenser pipe is 2-4 mm; the variable-diameter pulsating heat pipe is integrally cast and formed at the variable-diameter part; the straight pipe of the variable-diameter pulsating heat pipe is positioned in the regenerator, and the straight pipe and the bent pipe are positioned in the heating chamber and the condensation chamber.
3. The variable diameter pulsating heat pipe phase change thermal storage device of claim 1, wherein: the straight pipe part of the variable-diameter pulsating heat pipe is perforated to penetrate through a stainless steel plate between the heating chamber and the heat storage chamber and a stainless steel plate between the heat storage chamber and the condensing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121845892.7U CN215864822U (en) | 2021-08-09 | 2021-08-09 | Variable-diameter pulsating heat pipe phase-change heat storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121845892.7U CN215864822U (en) | 2021-08-09 | 2021-08-09 | Variable-diameter pulsating heat pipe phase-change heat storage device |
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| CN215864822U true CN215864822U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121845892.7U Active CN215864822U (en) | 2021-08-09 | 2021-08-09 | Variable-diameter pulsating heat pipe phase-change heat storage device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117553342A (en) * | 2024-01-12 | 2024-02-13 | 四川大学 | Heating system with efficient unit operation and heating method thereof |
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2021
- 2021-08-09 CN CN202121845892.7U patent/CN215864822U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117553342A (en) * | 2024-01-12 | 2024-02-13 | 四川大学 | Heating system with efficient unit operation and heating method thereof |
| CN117553342B (en) * | 2024-01-12 | 2024-05-03 | 四川大学 | Heating system with efficient unit operation and heating method thereof |
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