Abstract:

Based on the current energy utilization status， taking into account the organic combination of solar energy and gas， the gas engine heat pump system with solar energy was proposed and thermodynamic model was established. Exergy for the components of the system was researched， and the conclusion was drawn. With the water temperature increasing， the exergy of the condenser and the evaporator increasing， the exergy of the compressor reduced， but the exergy of the engine and heat exchanger have little change hardly. With the change of engine speeding， the exergy loss of compressor becomes larger， and the exergy loss of condenser and evaporator also showed a similarity law， but other parts of exergy loss almost unchanged. There is little difference in the variation law of useful energy loss of gas engine heat pump with or without composite solar energy. However, after the solar energy is compound, the configuration power of the gas engine can be reduced, the gas quantity can be reduced, and the useful energy loss value of each component except the solar collector plate is reduced, which is of great significance for reducing the total energy consumption of the system.

Key words: power engineering and engineering thermal physics, gas engine heat pump, solar energy, thermodynamics