Experimental investigation on melting heat transfer characteristics of lauric acid in a rectangular thermal storage unit
作者： Hossein Shokouhmand , Babak Kamkari
DOI: 10.1016/J.EXPTHERMFLUSCI.2013.06.010
关键词: Phase-change material 、 Convection 、 Convective heat transfer 、 Heat transfer 、 Film temperature 、 Heat transfer coefficient 、 Thermodynamics 、 Thermal conduction 、 Materials science 、 Thermal resistance
摘要: Abstract This paper presents an experimental effort to visualize temperature field and melt front evolution during solid–liquid phase change process. The study is focused on the melting of lauric acid in a rectangular thermal storage unit heated from one side. Thermophysical properties are determined found be desirable for application as medium material (PCM). Image processing photographs together with recorded temperatures used calculate fractions, temporal heat transfer characteristics, including average Nusselt number hot wall well local rates front. Moreover, interface morphology employed infer dominant mechanisms time-dependent flow structures different stages Results indicate that initial stage melting, conduction mode transfer, followed by transition convection regime dominated at later times. Approaching end process, bulk liquid PCM increases stratified appears upper part enclosure which reveals depression currents.
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