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首页> 外文期刊>International Journal of Heat and Mass Transfer >A numerical investigation of the melting heat transfer characteristics of phase change materials in different plate heat exchanger (latent heat thermal energy storage) systems
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A numerical investigation of the melting heat transfer characteristics of phase change materials in different plate heat exchanger (latent heat thermal energy storage) systems

机译：不同板式换热器（潜热能储存）系统中相变材料熔热特性的数值研究

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摘要

In this study, the melting heat transfer in plate heat exchanger LHTES(Latent Heat Thermal Energy Storage) systems was numerically investigated. In the numerical analyses, using the Finite Volume Method (FVM), the phase change process was examined for different heat exchanger geometries (Geometry a, b and c), different heat transfer fluid (HTF) inlet temperatures (52 °C, 57 °C and 62 °C), different steel plate thicknesses (0.4mm, 0.6mm and 0.8mm) and different PCMs(Phase Change Materials) (RT-35 and n-octadecane). The numerical analyses were performed by simplifying the problem down to two dimensions. From the results, time-dependent average PCM temperatures, and liquid fraction contours and graphs were produced. The results showed that for the same PCM, boundary conditions and geometrical characteristics, the complete melting time of the PCM in a plate heat exchanger LHTES system with different geometries could be decreased by 75% in comparison to a cylindrical LHTES system of the same PCM volume. The maximum thermal performance achieved was recorded for the following conditions: Geometry a, a HTF inlet temperature of 62 °C, a steel plate thickness of 0.6 mm and n-octadecane as the PCM.
机译：在该研究中，在数值上研究了板式热交换器LHTES（潜热能储能）系统的熔融传热。在数值分析中，使用有限体积法（FVM），检查相变过程，用于不同的热交换器几何形状（几何A，B和C），不同的传热流体（HTF）入口温度（52°C，57° C和62°C），不同的钢板厚度（0.4mm，0.6mm和0.8mm）和不同的PCM（相变材料）（RT-35和N-十八烷）。通过将问题降至两个维度来执行数值分析。从结果，产生时间依赖性平均PCM温度和液体分数轮廓和图表。结果表明，对于相同的PCM体积的圆柱形LHTES系统，对于相同的PCM，边界条件和几何特征，PCM在具有不同几何形状的板式热交换器LHTES系统中的完全熔化时间可以减少75％，相同的PCM体积的圆柱形LHTES系统。以下列条件记录所达到的最大热性能：几何A，HTF入口温度为62°C，钢板厚度为0.6mm，n-odandecane作为PCM。

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