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A solid-liquid phase change heat storage device based on air heat exchange

A technology of air heat exchange and phase change heat storage, applied in the direction of indirect heat exchangers, heat exchanger types, heat storage equipment, etc. , selection of container materials and other issues to achieve the effect of simple structure, stable charge and discharge heat, and increased contact area

Active Publication Date: 2019-04-30
HUBEI ABSOLUTE SINCERITY STEEL STRUCTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing air heat exchange technology, the pipeline setting is still retained, which fails to fully reflect the simplicity and advantages of the air heat exchange technology; the traditional heat storage field is mainly based on the sensible heat storage of materials, but sensible heat storage is difficult to meet high efficiency. High-density heat storage is required. At the same time, in terms of heat storage stability, sensible heat storage is not as stable and safe as phase change heat storage; for different phase change heat storage materials, the choice of packaging container materials also ensures that the heat storage device It is safe and feasible to operate, but in the current patent, no suitable container material is selected for different materials

Method used

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  • A solid-liquid phase change heat storage device based on air heat exchange
  • A solid-liquid phase change heat storage device based on air heat exchange
  • A solid-liquid phase change heat storage device based on air heat exchange

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] as attached Figure 1-3 and Figure 6 As shown, a solid-liquid phase change heat storage device based on air heat exchange includes a heat storage box 5 and a phase change heat storage unit 6. The heat storage box 5 is provided with a heat exchange medium inlet 1 and a heat exchange medium. The medium outlet 2 is connected with the internal space of the heat storage box 5; the phase change heat storage unit 6 includes a heat storage material container 7 and a phase change heat storage material 3, and the phase change heat storage material 3 is packaged in the heat storage material Inside the container 7 ; the phase change heat storage unit 6 is placed in the heat storage box 5 .

[0032] Such as Figure 4As shown, the heat storage box 5 is provided with 8 phase change heat storage units 6, each heat storage unit 6 is independent of each other, and the total volume of the 8 phase change heat storage units 6 accounts for 70% of the volume of the heat storage box 5. ~80...

Embodiment 2

[0040] This embodiment is basically the same as Embodiment 1, except that: the solid-liquid phase change heat storage material selects a high-temperature heat storage alloy: Mg-53% Zn eutectic alloy; at the same time, the heat storage material contains the container and the heat storage box Choose 304 stainless steel.

[0041] The measurement results of differential scanning calorimeter (DSC) show that the phase transition temperature and latent heat of phase transition of Mg-53% Zn eutectic alloy are 343°C and 165kJ / Kg respectively, and the heat storage density is 458.7MJ / m 3 Be 99.99% Mg, 99.99% Zn metal with purity to prepare Mg-53% Zn alloy, calculate the alloy ratio according to 12wt% Mg burning loss, after the smelting furnace is heated up to 680 ℃ to magnesium melting completely, then add Zn, cool down to 500°C, keep warm for 10 minutes, pour into the heat storage container to cool, and finally completely seal it into the heat storage box and put it into use. Before put...

Embodiment 3

[0043] It is basically the same as that of Example 1, except that the low-temperature phase change material: stearic acid is selected as the solid-liquid phase change heat storage material; 304 stainless steel is selected as the container for the heat storage material.

[0044] The measurement results of differential scanning calorimeter (DSC) show that the phase transition temperature and latent heat of phase transition of stearic acid are 70°C and 220kJ / Kg respectively, and the heat storage density is 191.4MJ / m 3 ; Stearic acid is suitable for low-temperature heat storage, the maximum operating temperature is 200°C, the heat storage capacity of a single heat storage box is 21.17MJ, and the heat exchange efficiency between the air in the heat storage box and the heat storage unit is above 80%.

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Abstract

The invention relates to a solid-liquid phase change heat storage device based on air heat exchange. The solid-liquid phase change heat storage device comprises a liquid storage box and a phase change heat storage unit. The heat storage box is provided with a heat exchange medium inlet and a heat exchange medium outlet which communicate with inner space of the heat storage box. The phase change heat storage unit comprises a heat storage material containing container and a phase change heat storage material, and the phase change heat storage material is packaged in the heat storage material containing container. The phase change heat storage unit is arranged in the heat storage box. The solid-liquid phase change heat storage device has the beneficial effects of being simple in structure, safe, reliable, stable in heat charging and discharging and high in efficiency and also has the beneficial effects of being simple in structure, safe, reliable, stable in heat charging and discharging and high in efficiency.

Description

technical field [0001] The invention relates to a solid-liquid phase change heat storage device based on air heat exchange. Background technique [0002] Solar thermal technology is to collect the heat radiated by the sun on the ground surface, and use the collected heat to generate electricity and heat through the heat exchange device, so as to achieve the purpose of replacing traditional fossil energy. Solar thermal power generation is one of the most important projects in solar energy. Conventional solar thermal power generation systems include heat collection systems, heat storage systems, heat exchange systems, and generator sets. Solar heat storage systems overcome solar energy due to day and night changes, climate change, and radiation fluctuations. Energy discontinuity caused by instability ensures stable power output. The heat storage system is composed of heat storage materials and containers: traditional heat storage materials are mainly water and heat transfer o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D20/02
CPCF28D20/021Y02E60/14Y02E70/30
Inventor 李元元吴启程晓敏朱教群周卫兵
Owner HUBEI ABSOLUTE SINCERITY STEEL STRUCTURE
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