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| Abstract: |
| Paraffin wax is a perfect phase change material (PCM) that can be used in latent heat storage units (LHSUs). The utilization of such LHSU is restricted by the poor conductivity of PCM. In the present work, a metal foam made of aluminium with PCM was used to produce a composite PCM as a thermal conductivity technique in PCM-LHSU and water was used as heat transfer fluid (HTF). An experimental investigation was carried out to evaluate the heat transfer characteristics of LHSU using pure PCM and composite PCM. The study included time-dependent visualization of the PCM during the melting and solidification processes. Besides, a thermocouple network was placed inside the heat storage to record the temperature profile during each process. Results showed that better performance could be obtained using composite PCM-LHSU for both melting and solidification processes. The melting time of composite PCM-LHSU was about 83% faster than that of a simple PCM-LHSU, and the percentage decreasing in the solidification time was about 85% due to the provision of metal foam. |
| Key words: phase change material metal foam latent heat composite PCM |
| DOI：10.11916/j.issn.1005-9113.2019017 |
| Clc Number:TB3 |
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| Descriptions in Chinese: |
| 复合相变材料对潜热储能系统中热性能作用的实验研究 Jasim Abdulateef1, Ahmed F. Hasan2*,Mustafa S. Mahdi2 （1. 迪亚拉大学 机械工程系，巴古拜 32001，伊拉克；2.迪亚拉大学 化学工程系，巴古拜 32001，伊拉克） 摘要：石蜡是可用于潜热储能系统单元（LHSU）的理想的相变材料（PCM）。这种潜热储能单元的使用因相变材料导热性差而受到限制。本文采用铝和相变材料制成的金属泡沫生产复合相变材料，以此作为相变材料-潜热储能单元中的导热材料，并使用水作为传热流体（HTF）。通过实验，评估了使用纯相变材料和复合相变材料的潜热储能单元的传热特性。研究包括熔化和凝固过程中相变材料的时变可视化。此外，热存储室内放置一个热电偶网络，记录每个过程的温度分布。结果表明，复合相变材料-潜热储能单元在熔化和凝固过程中均表现出较好的性能。由于金属泡沫的作用，复合相变材料-潜热储能单元的熔化时间比简单的相变材料-潜热储能单元快83%左右，凝固时间减少85%左右。 关键词：相变材料；金属泡沫；潜热；复合相变材料 |
