Comparison of refrigerated warehouse energy demand with R-717 and R-507 using eQUEST model

作者：Ataei Abtin^*; Dehghani M J

来源：International Journal of Green Energy, 2017, 14(11): 899-907.

DOI：10.1080/15435075.2017.1337016

• Coefficient of performance
• energy modeling
• eQUEST
• R-507
• R-717
• refrigerated warehouse

Natural refrigerant ammonia R-717 and synthetic azeotropic refrigerant R-507 (a blend containing 50% R-143a and 5% R-125 by weight) are used in a wide range of refrigeration systems especially in low-temperature applications. R-717 and R-507 are ozone friendly refrigerants, which have no Ozone Depletion Potential (ODP). Global Warming Potential (GWP) of R-717 and R-507 is equal to zero and 3300, respectively. The high amount of R-507 GWP demonstrates its negative effect on the Earth's climate change. In this study, a refrigerated warehouse located in Cincinnati, Ohio was modeled and the total energy demand and Coefficient of Performance (COP) was evaluated by eQUEST using two scenarios. The R-717 and R-507 were used as refrigerant in the first and second scenarios, respectively. The results showed that using R-717 in the refrigeration system leads to a 15% energy saving and a higher COP compared to R-507 in all working conditions. The only exception is that at an evaporating temperature below -35 degrees C which COP values of both refrigerants are approximately equal.

• 出版日期2017