Investigation and Experiment of Coupling Heating Device Based on Solar Energy and Dual Source Heat Pump

摘要

The combination of solar heating system and air source heat pump heating system is an effective way to improve the energy efficiency of single energy system. A new type of dual source heat pump is developed, which is equipped with both water source evaporator and air source evaporator. In which case, air-source evaporator extracts energy from air for ASHP heating and the solar collector loop is combined with the water-source evaporator for WSHP heating. The solar heat gain at low temperature will be fully utilized by combining with WSHP. Meanwhile, higher efficiency of solar collector will be obtained due to the lower internal medium temperature. The device we developed takes into account the functions of heating, cooling and hot water. Experiment showed that the instantaneous performance coefficient of heat pump unit (COP_(HP)) reached 3.8～4.4 under the mode of WSHP heating combined with solar energy compared with that of 1.6～2.2 in the condition of ASHP heating. The overall performance coefficient of system (COP_(system)) was as high as 3.1.