CN211651337U - Finned phase-change energy-storage heat exchanger - Google Patents

Abstract

The utility model discloses a fin formula phase transition energy storage heat exchanger, including inclosed heat exchanger shell the heat exchanger shell in roof and the diapire on be fixed with a plurality of oval hollow column fins respectively the left wall of heat exchanger shell on open and to have the air intake the right wall of heat exchanger shell on open and to have the air outlet heat exchanger shell and oval hollow column fin in fill respectively and have the phase transition heat accumulation material, the phase transition heat accumulation material adopt mass percent to be 95% positive decanoic acid and 5% dodecanol eutectic mixture respectively the roof and the diapire of heat exchanger shell on open respectively and to have the filling hole. The phase change heat exchanger can be used as a precooling device to be matched with various cooling systems, and the heat transfer effect is ensured.

Description

Finned phase-change energy-storage heat exchanger

Technical Field

The utility model relates to a phase transition energy storage technical field, concretely relates to can be used to terminal rib formula phase transition energy storage heat exchanger of indoor cooling.

Background

The phase change energy storage is an energy storage technology for absorbing or releasing heat by utilizing the change of the state of a phase change material, and compared with other materials, the phase change energy storage has the advantages of high energy storage density, small device volume, stable heat storage and release process, wide applicable temperature range and the like, can solve the problem that the supply and demand of energy utilization are not matched in time and space, and is an energy-saving and efficient energy utilization mode.

The phase change material packaging mode mainly comprises macroscopic packaging and microscopic packaging, wherein the microscopic packaging is to adsorb the phase change material in a corresponding coating material, and the melting and condensation process of the phase change material can be changed and even the supercooling phenomenon can occur due to the instability of a microstructure. Compared with microscopic packaging, the macroscopic packaging is convenient to disassemble and assemble and easy to replace, and heat exchange is enhanced by adding fins, grooves and the like, so that the method is an important direction for development of future phase-change heat storage heat exchangers. The heat exchange device formed by encapsulating the phase change material can effectively reduce the size of the heat exchange device.

Patent number ZL201810439976.7 discloses a finned phase-change heat storage and release integrated heat exchanger. The heat exchanger is used for an indoor heating end, the fins are used as an expansion surface, two water supply and return pipelines are arranged in the shell, the shell is filled with composite shaped phase change energy storage materials, the shell is in direct contact with the water pipes and the fins, a top cover is additionally arranged at the top of the shell, the top cover is a solid plate during heat storage, and a hole plate with holes is switched during heat release. The heat is stored by utilizing the valley electricity at night, and the heat is radiated indoors in the daytime, so that the indoor requirements are met. The system has a problem in that the phase change material is used only as a heat storage unit in the system, and the effect of maintaining room temperature stability of the phase change material is ignored. And thirdly, the phase-change energy storage material is filled between the water supply and return pipelines and is separated from the water system, so that the heat storage capacity of the phase-change material is reduced, and the using amount of the phase-change material is limited.

Disclosure of Invention

An object of the utility model is to overcome prior art's not enough, provide a heat transfer device of phase change material energy storage, adopt this device can absorb and store cold volume, avoid the energy to scatter and disappear, maintain indoor temperature within the comfortable degree scope, reach the purpose that the building was energy-conserving.

In order to achieve the above purpose, the utility model discloses a technical scheme is:

the finned phase-change energy-storage heat exchanger comprises a closed heat exchanger shell, wherein a plurality of elliptical hollow column fins are fixed on the top wall and the bottom wall in the heat exchanger shell respectively, an air inlet is formed in the left wall of the heat exchanger shell, an air outlet is formed in the right wall of the heat exchanger shell, phase-change heat storage materials are filled in the heat exchanger shell and the elliptical hollow column fins respectively, the phase-change heat storage materials are respectively 95% of n-decanoic acid and 5% of dodecanol eutectic mixture in mass percentage, and filling holes are formed in the top wall and the bottom wall of the heat exchanger shell respectively.

Compared with the prior art, the utility model discloses a following beneficial effect has:

1. the phase change heat exchanger can be used as a precooling device to be matched with various cold supply systems, and the heat transfer effect is ensured.

2. The phase change heat exchanger is also an independent device, can be directly used for indoor cooling while accumulating cold, also can radiate the cooling to indoor, plays the regulation and control effect to indoor ambient temperature.

3. The heat exchanger is provided with phase-change materials in the box body, and the phase-change materials are also arranged in the fins for enhancing heat exchange, so that the cold storage capacity is increased.

4. The fins are in elliptic cylindrical staggered arrangement, and compared with fins in the shape of a circle, a triangle and the like, the fins have good heat transfer enhancement effect.

5. The phase-change material is eutectic mixture of 95% n-decanoic acid and 5% dodecanol additive, the phase-change temperature is close to the indoor temperature, and the temperature is 24-28 ℃, so that the indoor overheating, supercooling and large temperature fluctuation can be prevented. The latent heat of phase change of the material is about 155.13KJ/Kg, and can completely meet the requirements of cooling in summer and regulating the temperature of indoor air.

6. The heat exchanger can be designed and processed in a modularized mode.

Drawings

Fig. 1 is a schematic structural diagram of a ribbed phase-change energy-storage heat exchanger according to the present invention;

fig. 2 is a detailed view of the device shown in fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in the drawing the utility model discloses a rib formula phase transition energy storage heat exchanger, including inclosed heat exchanger shell 1 the heat exchanger shell in roof and the diapire on be fixed with a plurality of oval hollow column fin 2 respectively heat exchanger shell 1's left wall on open and to have air intake 3 heat exchanger shell 1's right wall on open and to have air outlet 4 heat exchanger shell 1 and oval hollow column fin 2 in respectively filled with phase transition heat accumulation material, phase transition heat accumulation material adopt mass percent to be 95% normal capric acid and 5% dodecanol eutectic mixture respectively heat exchanger shell 1's roof and diapire on open respectively and to have filling hole 5, install discharge valve additional in filling hole 5 simultaneously when using, prevent that box intracavity internal pressure is too big. And filling the phase change heat storage material into the heat exchanger shell 1 and the elliptic cylindrical fins through the filling holes 5.

The utility model discloses a working process does:

(1) phase change cold accumulation process: when the system operates, cold supply fluid from an external cold source flows through the phase change energy storage heat exchanger through the air inlet to cool the phase change material in the heat exchanger, the fins enhance heat transfer, and the phase change material absorbs cold to solidification temperature so as to store the cold in the phase change material.

(2) And (3) a cooling process: when the external cold supply system is started, the phase-change material stores cold and supplies cold indoors at the same time. When the external system stops cooling, the indoor temperature rises, the phase-change material melts, the indoor air can exchange heat with the air through the phase-change heat exchanger, the indoor air is cooled, the heat exchanger can continue to supply cold to the indoor, and the energy storage device can supply cold to the indoor through the radiation effect when being close to the side surface of the room. Besides, as the indoor cold supply end, an indoor exhaust fan can be arranged on the device, indoor hot air enters the heat exchanger through the indoor exhaust fan through the air inlet 3 in the daytime, exchanges heat with the phase-change heat exchanger, brings out cold energy stored in the heat exchanger, and enters the indoor through the air supply outlet, so that indoor circulation is completed.

Claims (1)

1. The utility model provides a finned phase transition energy storage heat exchanger, includes inclosed heat exchanger casing, its characterized in that: the heat exchanger is characterized in that a plurality of elliptical hollow column ribs are fixed on the top wall and the bottom wall in the heat exchanger shell respectively, an air inlet is formed in the left wall of the heat exchanger shell, an air outlet is formed in the right wall of the heat exchanger shell, phase change heat storage materials are filled in the heat exchanger shell and the elliptical hollow column ribs respectively, and filling holes are formed in the top wall and the bottom wall of the heat exchanger shell respectively.

Images