相变材料在不同条件下节能效果的实验

摘要

目的 推导相变材料节能率的计算式,探讨不同环境温度、不同功率加热元件、不同相变材料掺量条件下相变材料的节能效果.方法 根据相变材料节能特点,建立节能测试系统,通过升/降温实验,对相变材料节能效果进行探讨.结果 随着相变材料掺量的降低、环境温度的降低、加热元件功率的增大,相变材料节能率降低.相变材料掺量为2 kg/m2、环境温度为10.8℃、加热元件功率为25 W时,相变系统的节能率最高为15.95％.结论 推导出了相变材料节能率的计算式为η=tz·ts/tz·ts-1；相变材料的节能效果与环境温度、供热速率及其掺量密切相关,环境温度高、供热速率慢、掺量高其节能效果好.%The calculation formula on energy-saving rate of phase change material (PCM) is derived, and the energy-saving effects of PCM in different environmental temperatures, different powers of heating elements and different dosages of PCM are discussed. According to energy-saving features of PCM, the testing and measuring system could be designed by myself, energy-saving effects of PCM could be discussed by the heating-up and heating-down experiments. The result indicated that the energy-saving rate of PCM was decreased as the environmental temperature failed down,the dosage of PCM decreased and the power of heating element increased. Its energy-saving rate reached 15. 95% , which was the highest, when the dosage of PCM is 2 kg/m2 ,the environmental temperature is 10. 8 ℃ and the power of heating element is 25 W. Therncalculation formula,which is η=tz·ts/tz·ts-1,on energy-saving rate of PCM has been derived. The energy-rnsaving effect of PCM is closely correlated with the environmental temperature, the dosage of PCM and thernpower of heating element. The high environmental temperature,the low heating rate and the high dosage ofrnPCM are good at the energy-saving effect of PCM.