A high-power phase change energy storage heat exchanger

Abstract

The invention discloses a high-power phase-change energy storage heat exchanger, which comprises a base plate, an outer circuit board, an inner circuit board, a phase-change laminate and a cover plate packaged sequentially from bottom to top, and the cover plate is provided with an inner The loop inlet pipe, the inner loop outlet pipe, the outer loop inlet pipe, the outer loop outlet pipe and the phase change layer filling pipe, the inner circuit board and the outer circuit board are both composed of a light metal base with high thermal conductivity and a fin matrix , the fin matrix is ​​used to enhance heat transfer, the fin matrix gaps are used to form the inner circuit fluid domain and the outer circuit fluid domain respectively, and the phase change layer is composed of phase change material and matrix fins. The invention can realize quick storage and slow dissipation of short-term, high-power heat, and realize the optimization of the control system. On the other hand, the fin matrix improves the thermal conductivity of paraffin-based phase change materials, improves the temperature uniformity of the melting process of phase change materials, prevents the accumulation of phase change materials in local areas after melting, and is suitable for spacecraft fluids Loop thermal control system.

Description

technical field [0001] The invention relates to the technical field of heat management, in particular to a high-power phase change energy storage heat exchanger. Background technique [0002] With the development of aerospace technology, there are more and more types of loads. One type of load has the characteristics of ultra-high heat flux and high power, and is short-term and periodic. If the heat is not dissipated in time, the temperature of the load will rise sharply, causing the load to burn out. To solve the problem of thermal control of such loads with ultra-high heat flux density and ultra-large calorific value, it is necessary to use a mechanical pump to drive a single-phase fluid circuit to complete the heat collection of high heat flux and high-power loads. To solve the problem of heat collection with a heat flux density of several hundred W / cm2, it is necessary to drive the pump to provide a larger flow rate of the working medium. The resistance of the working m...

AI Technical Summary

Problems solved by technology

However, the biggest defect of paraffin phase change materials is that the thermal conductivity is extremely low (generally around 0.1W / m·K), which seriously affects the transfer of heat inside it, thereby reducing its heat transfer performance.

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