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H-shaped finned tube type phase-change heat reservoir

A finned tube type, phase change heat storage material technology, applied in the field of H-type finned tube type phase change heat storage, can solve the problems of uneven heat transfer, poor effect and low thermal conductivity of phase change heat storage , to achieve the effect of uniform melting or solidification process, increased heat transfer area, and strong heat transfer capacity

Pending Publication Date: 2022-02-01
SHANGHAI BOILER WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the low thermal conductivity of the phase change heat storage material leads to uneven heat transfer and poor effect of the phase change heat storage device.

Method used

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  • H-shaped finned tube type phase-change heat reservoir
  • H-shaped finned tube type phase-change heat reservoir
  • H-shaped finned tube type phase-change heat reservoir

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Taking the phase change heat storage applied to power grid peak regulation or renewable surplus electricity as an example, the mixed inorganic salt of nitrate and carbonate is used as the phase change heat storage material, the phase change temperature is 230°C, and the heat transfer oil is used as the heat transfer material. Thermal medium; in the phase change heat storage, 4 sets of H-type finned heat exchange tubes are connected in parallel as the heat transfer channel. The size of the H-type finned tubes is 88×88mm, the middle gap is 10mm, the thickness is 2mm, and the longitudinal intercept is 30mm. Staggered arrangement; the angle steel fixes the H-shaped finned heat exchange tube group from the front and rear positions; the working temperature of the phase change heat storage is 220°C-240°C, the working temperature of the heat transfer oil is 180-300°C, and its working principle is :

[0031] Heat storage: high-temperature heat transfer oil flows in from the uppe...

Embodiment 2

[0034] Taking the phase change heat storage device used in trough solar thermal power generation as an example, water is used as the heat transfer medium, and H-shaped finned heat exchange tubes are installed inside, of which the size of the H-shaped finned tubes is 88×88mm, and the middle gap is 10mm , thickness 2mm, longitudinal intercept 30mm, staggered arrangement; during heat storage, water vapor flows in from the upper interface 5 of the H-shaped finned heat exchange tube group to heat the phase change material. After the working medium changes from water vapor to water, it changes from H The lower interface 6 of the H-shaped finned heat exchange tube group flows out; when releasing heat, water flows in from the lower interface 6 of the H-shaped finned heat exchange tube group to absorb the heat of the phase change material. After the working medium changes from water to steam, It flows out from the upper port 5 of the H-shaped finned heat exchange tube group.

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Abstract

The invention provides an H-shaped finned tube type phase-change heat reservoir, and relates to the technical field of phase-change heat storage. The H-shaped finned tube type phase-change heat reservoir comprises a shell, an H-shaped finned heat exchange tube group, a phase-change heat storage material, a feed port, a discharge port and a support part. The H-shaped finned heat exchange tube group is located in the shell, an upper connector and a lower connector of the H-shaped finned heat exchange tube group both penetrate through the shell, and space between the shell and the H-shaped finned heat exchange tube group is filled with the phase-change heat storage material. According to the invention, H-shaped fins are arranged on the heat exchange tube set in a staggered mode, so the melting or solidification process of the phase-change material can be more uniform, and local supercooling or superheating is avoided; in addition, the H-shaped finned heat exchange tube group is supported by angle steel or rib plates, so the heat exchange tube group can be effectively prevented from being deformed and cracked due to extrusion of the phase-change material in a repeated heat storage and heat release process. The phase-change heat reservoir provided by the invention is simple in structure, excellent in heat exchange performance, high in safety, applicable to various scenes such as a valley electricity / renewable residual electricity heating heat storage system and a solar photo-thermal heat storage system, and wide in an application scope.

Description

technical field [0001] The invention belongs to the technical field of phase change heat storage, in particular to an H-shaped finned tube type phase change heat storage device. Background technique [0002] Heat storage technology can effectively balance the uncoordinated relationship between energy supply and energy consumption in the energy utilization system, avoid unreasonable energy utilization, and improve energy utilization. Therefore, the development of energy storage technology is to ease the time and intensity of energy supply and demand. Significant pathways of mismatch. Phase change heat storage technology has the characteristics of constant temperature heat storage and heat release, high heat storage density, small volume, and simple process. Great application prospects. [0003] Phase change heat storage material is the core of phase change heat storage, but it has disadvantages such as low thermal conductivity, easy phase separation, and large volume change...

Claims

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Application Information

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IPC IPC(8): F28D20/02F28F1/32F28F9/00F28F9/013
CPCF28D20/021F28F1/325F28F9/0131F28F9/005Y02E60/14Y02E70/30
Inventor 邹洋王心怡张翔韩志江
Owner SHANGHAI BOILER WORKS
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