This paper focuses on the thermal transport phenomena in renewable thermal energy systems as in solar and geothermal based systems. The key focus is on numerically analyzing the coupled problem of vapor condensing on phase change material (PCM) storage containers in thermal based renewable energy systems. Since most solid-liquid phase materials suffer from poor thermal conductivities, the major resistance to heat transfer comes from PCM. Hence, high thermal conductivity, low-cost metal foam is suggested for use along with PCM to minimize this resistance. The conjugate problem of film condensation driven solid-liquid phase change of enclosed PCM inside metal foam is...