Heat transfer analysis and experimental research of heat pumps with condenser directly driving heat pipes

The heat pump with the condenser directly driving heat pipe which saves the water circulation part has the advantages of quick start and high energy efficiency. According to the empirical formula of heat transfer, the heat transfer process of the condensing tube bundle of the condenser is studied. Combined with the experimental data, the key parameters in the empirical formula of heat transfer are derived, and the distribution of thermal resistance is analysed. An experiment device is set up, and the experimental results show that the boiling heat transfer resistance outside the tube accounts for the largest share in the thermal resistance distribution of the condensing tube bundle. The heat transfer process is not greatly affected by the wall thickness of the condensing tube bundle and the number of heat pipes. The heating COP of the system reaches 9.43 when the indoor temperature is 18 ℃ and the outdoor temperature is 3.3 ℃.