Fin coils can enhance the heat transfer on the outside of the coils. XingChang Fan has developed a fin coil type phase change heat storage, using paraffin R54 as a phase change material, under three different flow conditions, respectively Three types of heat storages with different fin spacings were studied experimentally, and the temperature distribution and heat transfer coefficients under different working conditions were analyzed, and the heat storage efficiency, heat transfer coefficient and flow rate of this type of phase change heat storage were obtained. The conclusion is directly proportional and inversely proportional to the fin spacing.

The energy demand of the whole society is increasing, and the energy shortage has become a serious problem facing mankind. The research and utilization of energy-saving technologies have become a necessary means to support social development.

Among various energy-saving technologies, phase-change energy storage technology has been widely used. The waste heat of flue gas in power plants, the waste heat of industrial boilers, and the waste heat of exhaust gas from various internal combustion engines can be effectively used by phase-change heat storage technology. In order to save a lot of energy. Solar heat utilization and heat pump heating are currently more mature energy-saving technologies. Combined with low-temperature phase change heat storage technology with a phase change temperature of 40~60 ℃, it can make solar water heating system and heat pump hot water The system has better application prospects in the field of domestic hot water.

The phase change heat storage materials suitable for domestic hot water are mainly paraffin wax, sodium acetate, etc. The biggest disadvantage of these materials is the low thermal conductivity, which also becomes the main obstacle to their large-scale promotion and application. To overcome this obstacle, many studies A lot of work has been done by the staff, including the analysis of the heat transfer enhancement mechanism of the phase change and the improvement of the thermal conductivity of the phase change material. Among them, it is relatively simple to use various fins to enhance the heat transfer on the phase change material side of the heat storage body. And effective approach.

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