Theoretical And Experimental Study On High Temperature Water Source Heat Pump In New Engineering

Industrial cooling water and industrial wastewater contains large amounts of heat. Due to the low temperature can not be directly applied and been drained, resulting in waste of energy, while bringing environmental heat pollution. Water source heat pump technology using high-temperature waste heat temperature increases this part be used, will bring enormous economic and environmental benefit. The heat pump is widely used in refrigerants and due to limitations of technology, can only use 25 ℃ less heat and get hot water below 65 ℃. Unable to meet most industrial heat and waste heat recovery needs. Development can be recovered waste heat temperature range of 25-60 ℃, extraction above 80 ℃ hot water heat pump units, will have broad application prospects.In this paper, the theoretical analysis of the heat pump cycle. In HFC, HFE and mixtures thereof qualitative research starting new work, we propose a new mixed. The new refrigerant existing system components requires little modification. Theory of the heat pump cycle with a lower condensing pressure(<2.5MPa), low exhaust temperature(<130 ℃), the appropriate volume of cooling capacity, higher COP values. No ozone depletion potential, non-toxic, non-flammable, oil-soluble good.On the basis of a new study on the working fluid of the heat pump system has been improved. Increasing the steam jet cryogenic cooling circuit, developed a new high-temperature heat pump working fluid, including cryogenic cooling loop steam jet high temperature conditions of the heat pump cycle is determined, an evaporator, a condenser design and matching, selection compressors, control systems, variable conditions regulator, etc., and manufacturing prototypes.We developed a high temperature heat pump test stand, designed and built the experimental system. Virtual instrument technology, the preparation of operating procedures in the LABVIEW software platform, and the regulatory test system variable operating conditions. The test prototype development were studied. The proposed experiments aimed refrigerant mixtures MA1 and pure refrigerants R245 fa conducted experiments found that the condensation temperature in the range of 75 ~ 90 ℃ MA1 heating capacity, COPh value, pressure ratio and other parameters are better than R245 fa. At the water temperature is 90 ℃ case, MA1 of COPh is 3.27; and the exhaust temperature and the exhaust pressure parameters R245 fa more desirable, especially exhaust gas temperature context R245 fa account for a large advantage.The proposed experiments aimed refrigerant mixtures MA1 and pure refrigerants R245 fa be. It was found that the condensation temperature in the range of 75 ~ 90 ℃ MA1 heating capacity, COPh value, pressure ratio and other parameters are better than R245 fa, at the water temperature is 90 ℃ case, MA1 of COPh is 3.27. The exhaust gas temperature and exhaust pressure on parameters R245 fa more desirable, especially in terms of the exhaust gas temperature R245 fa account for a large advantage.