Combustion and Explosion Risk of the Refrigerant Leakage in the Refrigerator
Flammability of the new generation low global warming potential(GWP)refrigerant is a prominent factor limiting their further promotion and application.Therefore,it is crucial to study on the leakage,explosion,and deposition(LED)characteristics of flammable refrigerant in the limited spaces.Based on the characteristics of refrigerant leakage and explosion in the limited space,a three-dimensional refrigerant leakage in the limited space model is constructed using the refrigerator in this paper,and the refrigerant leakage and diffusion process is studied by the numerical simulation method.The effects of leakage direction,leakage hole size,and fan on refrigerant R600a and R290 LED characteristics are investigated and compared.Results show that the density has a significant impact on the refrigerant LED characteristics,and R290 has a greater combustion and explosion risk(CER)compared to R600a;The smaller leakage hole size could increase the refrigerant CER in a limited space;After the leakage of refrigerant with lower-density,the fan would significantly reduce the refrigerant CER in the limited space.
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