分户式低谷电蓄热供暖系统的蓄放热特性OA北大核心CSTPCD

A household off-peak electricity thermal storage heating system(HOETSHS)based on phase change material(PCM)was proposed.Its heat storage/release characteristics and heating performance were comprehensively explored through numerical simulation and experiments.Fluent was used to numerical simulation of the heat release process of HOETSHS.The effect of inlet air velocity,inlet temperature and thermal storage materials on the heat release performance of the thermal storage heating system were studied.The correctness of the simulated working condition was verified by experimental research.The results suggested that the inlet air velocity had a significant effect on the heat release performance of the system.As the inlet air velocity increased,the average outlet temperature of the system decreased,and the immediate heating load increased.However,the effect of the inlet temperature on the heat release performance of the system was relatively weak.Composite phase change material(CPCM)was more suitable as heat storage medium for the phase change thermal storage heating system than pure ammonium aluminum sulfate dodecahydrate due to its higher thermal conductivity.The HOETSHS had good heat storage and release capacity,which can make a useful reference for the utilization of latent heat storage in off-peak power.