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ISSN Online: 2379-1748
ISBN Flash Drive: 978-1-56700-483-0
ISBN Online: 978-1-56700-482-3
4th Thermal and Fluids Engineering Conference
DISCHARGING PROCESS OF A HIGH-TEMPERATURE HEAT PIPE-ASSISTED THERMAL ENERGY STORAGE SYSTEM WITH NANO-ENAHNCED PHASE CHANGE MATERIAL
摘要
In the present study, the thermal performance of a high-temperature latent heat thermal energy storage system during the discharging process is investigated numerically. To enhance the heat transfer, highly conductive nanoparticles are dispersed and finned heat pipes are embedded within the phase change material (PCM). A transient two-dimensional numerical model is developed using the commercial computational fluid dynamics package of ANSYS-FLUENT 18.2 to analyze the thermal characteristics of the storage unit during the discharging process. The solidification of the PCM is modeled by employing enthalpy-porosity technique. Copper oxide (CuO) and aluminum oxide (Al2O3) are the nanoparticles used to enhance the thermal conductivity of the PCM which is potassium nitrate (KNO3) with melting temperature of 335°C. The effects of type and volume fractions of nanoparticles, as well as the number of embedded heat pipes have been studied.