Abstract: With the development of environmental protection and energy conservation and emission reduction technology, the energy saving of supermarket freezing cabinet has been widely concerned. Phase change storage technology can realize the transfer of energy space and time, and it has certain energy saving value when applied to evaporator of supermarket freezing cabinet. The NaCl solution with suitable phase change temperature and latent heat was chosen as phase change cooling material, and the amount of the material was determined by the calculation of heat load. The temperature fluctuation, power and power consumption of the cooling cabinet are compared in different working conditions, so as to analyze the energy saving and economy of the system. The results show that the temperature rise of the supermarket freezing cabinet with the addition of the storage material can be delayed up to 42.17% at the ambient temperature of 25℃ and 0℃, and the energy consumption can be saved up to 4.87%.

Key words: Phase change cold storage materials, Supermarket freezing cabinet, Energy conservation