A method for adaptively changing the heat transfer interface of phase change materials
A technology of phase change materials and composite phase change materials, which is applied in the field of adaptively changing the heat transfer interface of phase change materials for heat dissipation problems of high heat consumption equipment, and can solve the problems of low phase change ratio, low thermal conductivity, and thermal resistance of phase change rate. Small problems, to achieve the effect of high phase change rate and high phase change rate
Active Publication Date: 2019-09-06
10TH RES INST OF CETC
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[0006] The purpose of the present invention is to provide a method for adaptively changing the heat transfer interface of phase change materials with high phase change rate and small heat transfer resistance for the problems of low thermal conductivity and low phase change ratio of traditional phase change energy storage devices
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[0017] refer to Figure 1-3 . According to the present invention, the paraffin-based composite phase-change material is wrapped with a flexible heat-conducting nano-composite material to form phase-change particles with a scale ranging from tens of microns to hundreds of microns; the above-mentioned phase-change particles are made into paraffin wax of a porous medium by a foaming process base flexible porous phase change material; the paraffin-based flexible porous phase change material is packaged to form a phase change energy storage device; the volumetric pump 3 connected to the phase change energy storage device makes the liquid circulate through the heat source 4, and the test phase change storage The two ends of the differential pressure gauge 2 capable of the pressure difference between the inlet and outlet of the device are respectively connected to the fluid inlet and outlet of the phase change energy storage device 1, and a controller 5 is connected between the diffe...
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Abstract
The invention discloses a method for adaptively changing the heat transfer interface of a phase change material, and aims to provide a method featuring high phase change rate and low heat transfer resistance. The invention is implemented by the following technical scheme: a paraffin-based composite phase change material is wrapped in a flexible conductive nano composite material, and phase change particles with the size between tens of microns and hundreds of microns are formed; a paraffin-based flexible porous phase change material of a porous medium is prepared from the phase change particles through a foaming process; the paraffin-based flexible porous phase change material is packaged to form a phase change energy storage device; a differential pressure gauge is powered up, a volume pump is opened, the energy of a heat source enters the phase change energy storage device through liquid refrigerant, the liquid refrigerant is directly guided into the paraffin-based flexible porous phase change material, the liquid refrigerant flows in the gaps of the phase change particles and carries heat to near the phase change particles, and the heat from the heat source is absorbed quickly; and the heat transfer interface of the phase change energy storage device changes adaptively with heat transfer, and the phase change process of the phase change particles accelerates.
Description
technical field [0001] The invention relates to the thermal control field of electronic equipment, and is applicable to a method for adaptively changing the heat transfer interface of a phase change material for solving the heat dissipation problem of high heat consumption equipment working in a short time. Background technique [0002] A phase change energy storage device is a device that converts thermal energy into chemical energy and then stores it. It stores thermal energy in the phase change material through heat exchange. At this time, the phase change material encapsulated in the energy storage unit undergoes a phase change, making it absorb a large amount of latent heat during the phase change and keep the temperature constant in the energy storage element. The large amount of heat absorbed is stored to realize the heat storage process. When needed, use the phase change material, and then release the heat energy for use, so that the solid heat storage body and the ...
Claims
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IPC IPC(8): H05K7/20
Inventor翁夏吕倩胡家渝熊长武
Owner10TH RES INST OF CETC