Shell-and-tube point discharge solid-liquid phase change enhanced heat transfer device based on electrofluid mechanics

Abstract

The invention discloses a shell-and-tube point discharge solid-liquid phase change enhanced heat transfer device based on electrofluid mechanics and belongs to the technical field of solid-liquid phase change enhancement. The problem that the speed of the phase change process cannot be adjusted through an existing passive enhancing technology is solved. The shell-and-tube point discharge solid-liquid phase change enhanced heat transfer device comprises a metal outer pipe and a plurality of composite inner pipes arranged in the metal outer pipe; phase change materials are filled between the metal outer pipe and the composite inner pipes; the metal outer pipe is grounded; and a heat insulation layer is arranged on the outer wall of the metal outer pipe; each composite inner pipe comprises ametal inner pipe, a plurality of groups of fins arranged outside the metal inner pipe and an insulating layer arranged on the inner wall of the metal inner pipe; direct-current positive voltage is connected into the metal inner pipes; and a heat source circulates in the metal inner pipes. Compared with the existing passive enhancing technology, due to the fact that the electric heating convectionintensity in a flow field is directly affected by the potential difference between polar plates, the speed of the phase change process can be actively controlled by adjusting the input voltage of an anode plate. After an electric field is applied, the flow intensity can be remarkably enhanced, and a good phase change enhancing effect is obtained.

Description

technical field

[0001] The invention relates to a shell-and-tube type tip discharge solid-liquid phase change enhanced heat transfer device based on electrohydrodynamics, belonging to the technical field of solid-liquid phase change enhanced. Background technique

[0002] Solid-liquid phase change materials are widely used in energy storage systems due to their advantages such as high energy storage density and small temperature and volume changes. Among them, organic phase change materials are widely used due to their low melting point, good chemical stability and large latent heat of phase change. However, due to the low thermal conductivity of organic phase change materials, the internal heat transfer is slow in practical applications, and the efficient storage of thermal energy cannot be realized in a limited time. Therefore, a series of schemes have been proposed to strengthen the solid-liquid phase transition process and improve energy storage efficiency. Factors aff...

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