Thermal conductivity enhancement for phase change storage media

摘要: Thermal energy storage can be used as either a heat source or sink for spacecraft conversion and rejection systems. One major issue that needed to addressed is most phase-change materials (PCMs) with high density have an unacceptably low thermal conductivity. Two enhancement techniques are proposed in this paper. The baseline case utilizes LiH encapsulated thin SS304 container. first technique uses smaller containers of various shapes contained bigger cylindrical container filled Li. second focuses on metal/phase-change material (M/PCM) composite. Specifically, 5% Ni added uniformly so the mixture has same volume unit. analyzed numerically their effectiveness assessed both constant surface flux temperature conditions. Results shown include amount PCM melted function time maximum within units. M/PCM composite gives best