ENHANCEMENT OF OVERALL THERMAL CONDUCTANCE OF PCM DURING THE SOLIDIFICATION PROCESS BY AXIALLY FINNED HEAT PIPES FOR THERMAL ENERGY STORAGE

摘要：

　　Utilising heat pipes in latent heat thermal energy storage (LHTES) systems for high temperature applications is the state-of-the-art technique to reduce the thermal resistance associated with the low thermal conductivity of the phase change material (PCM).A numerical investigation was conducted on the thermal performance of LHTES systems which use heat pipes for solar thermal power generation.The aim of this study is to quantify the advantages of utilising axially firned heat pipes instead of bare heat pipes in LHTES systems.While the numerical model uses the effective heat capacity formulation to simulate the PCM solidification process, it uses the thermal resistance network approach to simulate the heat transfer phenomena through the heat pipes.The benefits of finning the heat pipes were presented by considering the energy extracted from the PCM and the heat pipes effectiveness during a certain period of time.The results showed that by adding four axial fins to the heat pipes, the thermal performance of LHTES is enhanced.Specifically, the energy extracted from the PCM increased by 86 %, whereas the heat pipes effectiveness increased by 24 %.

关键词： Fins heat pipes PCM thermal storage solidification

作者: Abdulmaied Khalifa Abhijit Date Aliakbar Akbarzadeh Thang Nguyen Randeep Singh Masataka Mochizuki

作者单位: Energy Conservation and Renewable Energy Group School of Aerospace, Mechanical and Manufacturing Eng R&D Department Thermal Technology Division Fujikura Ltd.1-5-1, Kiba, Koto-KuTokyo 1358512, Japan

会议类型: 国际会议

会议名称: The 11th International Heat Pipe Symposium(第十一届国际热管研讨会)

会议地点: 北京

会议语种:英文

页码: 71-76

在线出版日期: 2013-06-09（万方平台首次上网日期，不代表论文的发表时间）