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首页> 外文期刊>International Journal of Heat and Mass Transfer >Laminar film condensation driven latent thermal energy storage in rectangular containers
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Laminar film condensation driven latent thermal energy storage in rectangular containers

机译：矩形容器中层流膜冷凝驱动的潜热能存储

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摘要

This paper focuses on numerically analyzing the thermal transport phenomena in the transient conjugate problem of melting and laminar film condensation. The key focus is to identify an optimum container aspect ratio/shape and conditions for which the heat storage time and the storage capacity are minimum and maximum respectively. Since most solid-liquid phase change materials (PCMs) suffer from poor thermal conductivities, the major resistance to heat transfer comes from PCM. Hence, high thermal conductivity, low-cost metal foam is suggested for use along with PCM to minimize this resistance. The conjugate transient problem of film condensation driven solid-liquid phase change of PCM impregnated inside porous metal foam is numerically analyzed. An effective heat capacity formulation is employed for modeling the transient PCM phase change in porous foam and is solved using finite element method. It is coupled with laminar film condensation on the outside of the storage container. The model is then used for selecting the best aspect ratio for thermal energy storage (TES) containers that enables to store comparatively the maximum heat. The results of the developed model showed that the major resistance to heat transfer and hence efficient thermal energy storage depends strongly on the aspect ratio of the PCM storage containers.
机译：本文着重于数值分析熔融和层流膜冷凝的瞬态共轭问题中的热输运现象。关键重点是确定最佳的容器长宽比/形状和储热时间和储热量分别最大和最小的条件。由于大多数固液相变材料（PCM）的热导率均较差，因此，传热的主要阻力来自PCM。因此，建议将高导热率，低成本的金属泡沫与PCM一起使用以最小化此电阻。数值分析了膜缩合驱动的多孔金属泡沫塑料内部浸渍的PCM固液相变的共轭瞬态问题。有效的热容公式用于模拟多孔泡沫中的瞬态PCM相变，并使用有限元方法求解。它与存储容器外部的层状薄膜凝结相结合。然后，该模型用于为热能存储（TES）容器选择最佳纵横比，从而能够存储相对最大的热量。开发模型的结果表明，主要的传热阻力以及有效的热能存储很大程度上取决于PCM存储容器的纵横比。

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