Abstract
Electric power used for air conditioning in the summer time has been increase year after year. To reduce summer peak demand, an ice-based heat storage system, which makes ice using surplus electricity during nighttime and utilizes the accumulated ice for air conditioning in the daytime, is developed. The ice heat storage system needs sophisticated technology that enables to accumulate heat effectively and utilizes the stored cold energy from ice efficiently. We have developed a technique that brings about substantial increase in heat transfer by supplying fine air bubbles between the piping of refrigeration and formed ice when melting the ice. Our repeating experiments on the heat transfer performance proved that substantial increase in heat conductivity was achieved. In this paper we show configuration of the system and how it operates.
