A Study on the Heat Exchange Performance for the Liquid Based Solar Thermal Storage

Liquid Based Solar Thermal Storage를 위한 열교환성능(熱交換性能)에 관한 연구(硏究)

A solar hot water storage tank was designed and constructed to examine the heat exchange performances on load side for the solar thermal storage in a single loop solar water heating system. In the tank helically coiled tube was immersed. The hot water was circulated from either top or bottom. The circulation flow rate was varied from 500 ml/min to 20,000 ml/min. The effect of flow rate was observed. The thermal performances according to the flow rate and flow direction were examined. The temperature distributions in the tank and inside of the tubes were plotted along the process of cooling.