Localized heating element distribution in composite metal foam‐phase change material: Fourier's law and creeping flow effects

A numerical parametric study is presented of a domestic thermal storage heat exchanger to explore the effect highly localized positive temperature coefficient cylindrical heating elements in phase change material (PCM) with conductive enhancement by open-pore metal foam. By using 90 L commercially available Rubitherm RT70HC wax, 5.7 kWh energy captured unit. The discharge via central convective air channel. constant low-temperature are inherently safe for combustible PCM. distribution Fourier's law and creeping flow investigated local equilibrium assumption between PCM Heating element position, diameter, varied optimize charge time exit temperature. Two 1 cm diameter 90°C produce suitable performance overnight store charging 7.23 hours. Discharge channel provides an average output over 30°C. results indicated that inside foam almost follows law. molten pores porous medium (free convection effect) has inconsiderable influence on transfer domain.