Optimum design method for two-dimensional heat transfer model of phase change heat storage device

Abstract

The invention discloses an optimum design method for a two-dimensional heat transfer model of a phase change heat storage device. The optimum design method for the two-dimensional heat transfer model of the phase change heat storage device is used in a returning process of a reused aircraft; metal ribs and paraffin phase change materials are stored in the phase change heat storage device; difference between the thermal conductivity, the density and the specific heat of the metal ribs and the thermal conductivity, the density and the specific heat of the paraffin phase change materials is large; the solid phase change materials are changed into liquid after absorbing heat, namely, the phase change materials can be in a solid state or a liquid state; the heat exchange relation of the phase change materials is different from that of the metal ribs; and the two-dimensional heat transfer model is divided into a bottom plate, the paraffin phase change materials, the metal ribs and an upper cover plate according to the heat exchange relation of the phase change heat storage device. The optimum design method comprises the following steps of establishing a heat transfer equation according to a heat exchange mode between the phase change materials and a rib interface; solving a function relationship equation between rib parameters and design inputting parameters by using a finite difference method; and determining design variable, an objective function, a constraint condition and a relation of the design variable, the objective function and the constraint condition to obtain the thicknesses of the ribs and the optimal solution of a distance between each two adjacent ribs and finish an optimum design scheme of the phase change device.

Description

Technical field: [0001] The present invention relates to an optimal design method for a high-efficiency phase change energy storage device, in particular to an optimal design method for a two-dimensional heat transfer model of a phase change heat storage device, which is mainly used in the reentry and return process of a reusable aircraft An optimal design method for a two-dimensional heat transfer model of a phase change heat storage device. Background technique: [0002] During the reentry and return process of the reusable aircraft, it will be affected by strong aerodynamic heating, so that the back temperature of the thermal protection components of the aircraft will be higher. Because the cabin is sealed, the heat will not only be unable to spread outward, but will also be transmitted to the equipment in the cabin. It is difficult to meet the temperature level requirements of the instruments and equipment in the cabin simply by relying on conventional thermal control de...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an optimal design method for the two-dimensional heat transfer model of the phase change heat storage device, which is mainly used for the two-dimensional heat transfer of the phase change heat storage device during the reentry and return process of the reusable aircraft The optimal design method of the model overcomes the shortcomings of large errors and low efficiency of numerical methods

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