A group of mixed working media, containing HFCs and HCs for heat pump at mid and high temperature

Abstract

A group of mixed working media suitable to be used as refrigerant for heat pump with condensing temperature of 60-120 deg.c cotnains eight component materials of HFC134a, HFC152a, R1311, HFC143, HFC 236fa, HFC 245fa, HC600 and HC600a. The eight component materials can be prepared to be binary and ternary mixture as per different mass ratio and its preparing process is to carry out physical mixing of abovesaid component materials as per appointed ratio at ordinary temperature for forming relevant mixed working media.

Description

technical field [0001] The invention belongs to refrigerants in heat pumps or refrigeration and air-conditioning systems, and particularly relates to refrigerants used as refrigerants in medium-high temperature heat pump systems with a condensation temperature of 60-120°C. Background technique [0002] For the energy-consuming links that exist in large numbers in production and life and require relatively low thermal energy grades (temperature is 60-160°C), the use of heat pump heating technology not only has a higher total energy utilization efficiency than conventional energy supply methods, but also reduces CO 2 emissions (thereby reducing the greenhouse effect), and can also effectively utilize industrial waste heat, geothermal energy, solar energy, and low-grade heat energy contained in the environment (air, soil, surface water or shallow groundwater) to reduce heat pollution caused by waste heat discharge. At present, heat pump technology i...

AI Technical Summary

Problems solved by technology

At present, the most widely used air-conditioning-heat pump systems use HCFC22 or its substitutes R407C, R410A, etc. as the working fluid. The upper limit of pressure and discharge temperature of the system is easy to cause accidents), and cannot provide heat energy at a higher temperature level