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A phase change heat storage enhancement device based on a variable magnetic field and its operation method

An operation method and a technology for strengthening the device, which are used in heat storage equipment, heat transfer modification, indirect heat exchangers, etc., to achieve the effects of accelerating heat transfer, high thermal conductivity, and improving phase change rate

Active Publication Date: 2020-11-24
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The promotion effect of natural convection on the melting / solidification process of phase change materials is relatively significant, but the existing phase change strengthening technologies limit the convection of liquid phase change materials to a certain extent while improving heat conduction, restricting its enhanced phase change. Effect

Method used

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  • A phase change heat storage enhancement device based on a variable magnetic field and its operation method

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Embodiment Construction

[0026] A preferred embodiment of the present invention provides a phase change heat storage enhancement device based on a variable magnetic field and its operating method, such as figure 1 As shown, it specifically includes an electromagnetic coil 1, a power supply 2, a time relay 3, a heat storage shell 4, a phase change material 5, a magnetic particle 6, a heat transfer fluid channel 7, a heat transfer fluid inlet 8 and a heat transfer fluid outlet 9 .

[0027] The phase change heat storage strengthening device can be divided into a variable magnetic field generating part and a heat storage part according to functions.

[0028] Among them, the variable magnetic field generation part includes electromagnetic coil 1, power supply 2 and time relay 3, and its connection mode is: electromagnetic coil 1, power supply 2 and time relay 3 are connected in series to form a closed circuit, wherein time relay 3 plays a role in the power supply circuit. The function of periodic disconne...

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Abstract

The invention discloses a phase change heat storage reinforcing device based on a variable magnetic field and an operating method of the phase change heat storage reinforcing device. The device comprises an electromagnetic coil, a power source, a time relay, a heat storage device shell body, a phase change material, magnetic particles, a heat transfer fluid passageway, a heat transfer fluid inletand a heat transfer fluid outlet. When the phase change material stores or releases heat, the electromagnetic coil periodically works under the effects of the power source and the time relay, the magnetic particles are dragged to move between a solid-liquid interface and a liquid-state region up and down, the heat is transferred, and meanwhile the magnetic particles can drive the liquid-state phase change material to achieve forced convection. The phase change process of the phase change material is reinforced on the two aspects of heat conduction and flow, and the phase change rate of the phase change material can be remarkably increased.

Description

technical field [0001] The invention designs the enhanced heat exchange field, especially a phase change heat storage enhanced device based on a variable magnetic field and its operating method. Background technique [0002] With the rapid economic development of the current society, the energy crisis caused by the depletion of fossil energy is also gradually reflected, and the voice of increasing the proportion of renewable energy utilization is also getting louder. Renewable energy represented by solar energy and wind energy has the characteristics of discontinuous sources, so energy storage devices need to be configured in practical applications. [0003] Phase change materials have the advantages of high heat storage density, constant heat release temperature, good cycle stability and simple control, and can be widely used in solar heat storage, industrial waste heat utilization, building heat recovery and other fields. However, the thermal conductivity of phase change ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D20/02F28F13/06
CPCF28D20/021F28F13/06Y02E60/14
Inventor 范誉斌张学军赵阳张春伟余萌
Owner ZHEJIANG UNIV
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