Optimal design method for a finned phase change heat storage device

Abstract

An optimizing and designing method of a rib type phase change heat storage device includes the steps of firstly, determining the heat flow density of the lower base plate of the rib type phase change heat storage device and the section surface density upper limit of the same; secondly, taking the part, along the height direction and between the symmetrical shaft, of two adjacent ribs of the rib type phase change heat storage device as the typical analysis unit, and taking half of the typical analysis unit as one analysis unit; thirdly, building a two-dimensional heat transfer model of the one analysis unit; fourthly, initializing W, calculating the temperature difference when the heat storage materials are totally melted according to the two-dimensional heat transfer model, and optimizing to achieve the minimum temperature different to obtain optimized half distance W between the adjacent ribs; fifthly, calculating the thickness S2 of the ribs according to the optimized W, and determining the section surface density rho of the device, judging whether rho is larger than rho1 or not, if so, increasing the optimized W, and optimizing from the fourth step; or else, designing the rib type phase change heat storage device according to the optimized W and S2.

Description

technical field [0001] The invention relates to an optimal design method of a high-efficiency phase-change thermal storage device, especially for the optimal design of a fin-type phase-change thermal storage device, which is mainly used for the thermal control system design and intermittent Temperature control of working electronics. Background technique [0002] During the reentry and return process of the reusable orbital maneuvering vehicle, it will be affected by strong aerodynamic heating, so that the back temperature of the thermal protection components of the vehicle is extremely high. The interior of the cabin is sealed, so the heat cannot be diffused outwards, and it will also be transmitted to the equipment in the cabin, which will easily lead to failure of the equipment in the cabin. All waste heat is absorbed. [0003] When selecting phase change materials, because paraffin materials have the advantages of high latent heat, low price, stable temperature and che...

AI Technical Summary

Problems solved by technology

[0007] The technical solution of the present invention is to provide an optimal design method for the finned phase change heat storage device in the reentry and return process of the reusable orbital maneuvering vehicle, which overcomes the shortcomings of large errors and low efficiency of the traditional numerical simulation method

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