Abstract
ABSTRACT In the present work, a sensible heat storage system with multi-tubular cavities is tested. Heat storage system having a capacity of 8 MJ is made of concrete and air is selected as heat transfer fluid. The diameter of the cylindrical heat storage system is 0.29 m which contains multiple tubular cavities each having diameter of 0.019 m. It is observed that the effect of mass flow rate on different parameters is found negligible beyond 0.029 kg/s. The maximum energy efficiency of the fully charged system corresponds to the maximum mass flow rate while fluid enters at minimum temperature. Sensible heat storage at fluid flow rates of 0.029 kg/s and 0.031 kg/s are in close approximation irrespective of the fluid temperature.
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