Abstract
In order to find a high-temperature heat pump (HTHP) working medium suitable for industrial waste heat recovery, this paper theoretically analyzes the thermodynamic properties of six refrigerants, including the coefficient of performance (COP), condensation pressure, compression ratio, heating capacity, exhaust temperature, and compressor power consumption. Based on the theoretical analysis results, environmental effects and the temperature range of industrial waste heat, MC-1 can be considered as a suitable working medium for high-temperature water source heat pump. The thermodynamic performance of MC-1 was experimentally studied and compared with that of HFC245fa and F-1 refrigerants. The results show that when the outlet water temperature of the condenser changes from 65 to 110 ℃ and the temperature lift is 35 ℃, the coefficient of performance of MC-1 varies from 4.24 to 5.05, which is much higher than that of both HCFC245fa and F-1. When the outlet water temperature of the condenser varies from 95 to 100 ℃, the average coefficient of performance of MC-1 is 16.2% higher than F-1 and 18.0% higher than HCFC245fa. The relative deviation between the theoretical calculation results and the experimental results of the main thermodynamic performance parameters does not exceed 10%, indicating that the theoretical results are reliable. Therefore, MC-1 can be recommended as the working medium for high-temperature heat pump with a single-stage cycle.
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