Numerical Study on Phase Change Heat Transfer of Paraffin Filled in Aluminum Foams in Solar Flat-plate Collector
This paper is to study the phase change heat transfer process of paraffin filled in aluminum foams integrated in a solar fiat-plate collector. A two-temperature model is proposed to analyze conduction and convection between the aluminum foams and paraffin in solid or liquid phases. The momentum conservation of liquid paraffin is simulated with Darcys model with the Brinkman-Forchheimer extension. The results indicate that the heat transfer performance is significantly improved by using the aluminum foams filled with paraffin. It is also shown that the assumption of the local thermal equilibrium between the foam and paraffin invoked in previous studies is inadequate in predicting the heat transfer behavior, whereas the two-temperature model proposed in this work without the local thermal equilibrium assumption can result in a more realistic prediction to the phase-change heat transfer process.
Solar energy Numerical simulation Paraffin Aluminium foams Two temperature model
Zhenqian Chen Donghua Peng Min Li Changhai Peng
School of Energy and Environment,Iiuse,Southeast University,Nanjing,China ISSUE,Southeast University School of Energy and Environment,Iiuse,Southeast University,Nanjing,China ISSUE,Southeast University,Nanjing,China School of Material Science and Engineering,Southeast Univer ISSUE,Southeast University,Nanjing,China School of Architecture,Southeast University,Nanjing,China
国际会议
The 6th International Symposium on Heating,Ventilating and Air Conditioning(第六届国际暖通空调学术会议)
南京
英文
1970-1977
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）