论文标题
CFD分析具有不同几何配置和流量条件的潜热储能系统
CFD Analysis of Latent Heat Energy Storage System with Different Geometric Configurations and Flow Conditions
论文作者
论文摘要
潜在的供暖技术正在全球范围内用于弥合能源需求和需求之间的差距。材料在充电过程（熔化）期间存储能量，并在放电过程中释放能量（固化）。尽管具有各种优势，例如高储能密度，但它遭受了以下事实：大多数相变材料（PCM）常用的导热率非常低，因此充电 /放电时间非常缓慢。在当前的工作中，考虑了壳和管类型的热交换器，壳侧具有相变材料，并考虑了管侧的传热液。传热液（HTF）（HTF）的单个和双通（反和平行）排列，研究了传热液的流速和入口温度对熔化和凝固时间的影响。 PCM熔化中遇到的主要困难是在充电过程中底部的固体（未滤波）部分的积累，而在放电过程中，液体部分保持在顶部，这在很大程度上降低了系统的效率。在这项研究中，已经尝试通过考虑壳和管热交换器的两种配置（双管和三个管）来提高系统效率，并发现后一种情况具有更好的性能。
The Latent heat storage technology is being used worldwide to bridge the gap between supply and demand of energy. The material store energy during the charging process (melting) and releases energy during the discharging process (solidification). In spite of having various advantages such as high storage energy density, it suffers from the fact that most Phase Change Materials (PCMs) commonly used have a very low thermal conductivity, hence, very slow charging /discharging times. In the current work, a shell and tube type heat exchanger with phase change material on the shell side and heat transfer fluid on the tube side are considered. The effect of flow rate and inlet temperature of heat transfer fluid on melting and solidification times are investigated with single and double pass (counter and parallel) arrangements of Heat Transfer Fluid (HTF). The major difficulty encountered in the melting of the PCM is the accumulation of solid (unmelted) part at the bottom during the charging process, while the liquid part remains at the top during the discharging process, which decreases the efficiency of the system to quite a great extent. In this study, an attempt has been made to improve the efficiency of the system by considering two configurations (double and triple tube) of the shell and tube heat exchanger and it is found that the latter case has better performance.
