Mixed refrigerant applicable to large-circulation temperature rise for medium-high temperature heat pump

[0019] The medium-high temperature heat pump mixed working fluid suitable for large cycle temperature rise, the components in mass percentage are: 2.0% HC1270, 83.0% HFC134a and 15.0% HCFC142b.

[0020] After physically mixing the components at room temperature, it is suitable as a refrigerant for medium and high temperature heat pump systems with a cycle temperature rise (evaporation and condensation temperature difference) of 60-80°C and a condensation temperature of 70-85°C, and can ensure cycle energy efficiency and The main hardware matching degree of the unit.

[0022] It is a medium-high temperature heat pump mixed working fluid suitable for large cycle temperature rise. The components in mass percentage are: 2.0% HC1270, 10.0% HFC134a and 88.0% HCFC142b.

[0023] After physically mixing the components at room temperature, it is suitable as a refrigerant for medium and high temperature heat pump systems with a cycle temperature rise (evaporation and condensation temperature difference) of 60-80°C and a condensation temperature of 70-100°C, and can ensure cycle energy efficiency and The main hardware matching degree of the unit.

[0025] The design working conditions of the heat pump system in Example 1 are taken as follows: the average evaporation temperature is 0°C, the average condensation temperature is 80°C, the suction superheat temperature is 3°C, the subcooling temperature is 2°C, and the constant entropy efficiency in the compression process is 90%. , The motor efficiency is 85%, the mechanical efficiency is 90%, and the clearance volume is 1%. The design working conditions of the heat pump system in Example 2 are: the average evaporation temperature is 20°C, the average condensation temperature is 100°C, the suction superheat temperature is 3°C, the subcooling temperature is 2°C, and the constant entropy efficiency in the compression process is 90%. , The motor efficiency is 85%, the mechanical efficiency is 90%, and the clearance volume is 1%. Choose R134a compressor from a certain manufacturer, the nameplate displacement is 72.3m 3 / h; According to the cycle calculation, the relevant parame...