Abstract
CO2 hydrate can be used as an alternate cooling substance in air-conditioning systems to minimize the use of traditional refrigerants, such as HFCs and HCFCs. A novel CO2 hydrate-based refrigeration system with a function of cold energy storage was designed and investigated, using tetrahydrofuran (THF) as the thermodynamic promoter. Coefficient of performance (COP) of this system was calculated based on the simulation results. Effects of various operation parameters were also studied closely. The cold storage operation was then designed to investigate the energy storage ability of the current system. Results show that the system COP is 6.8, which is the major strength of this novel system. Because of the energy intensive process of CO2 compression, the work imposed on elevating the gas pressure was considerable. A search for more appropriate additives or alternate guest substances should be conducted. In addition, compressor efficiency and pump efficiency are both critical for improving the energy efficie...
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