Component matching research of complementary heating system with solar assisted ground-source heat pump and heat supply network in severe cold zone

Based on an individual building in a residential quarter in Shenyang as the research object, establishes a system simulation model with TRNSYS software. Studies the complementarity of solar assisted ground-source heat pump and heat supply network, as well as the compatibility of solar energy collector, heat storage water tank and buried pipe. The results show that in the middle of the heating period, after the heat supply network is put into operation, the heat water supply temperature increases significantly. The average temperature of outlet water from heat pump condenser is 49 ℃, and it is 53 ℃ after heat exchange, which can meet the requirements of the terminal. Under the condition of the same heat load, when the solar collector area increases by 1 m², the buried pipe length can reduce about 5.6 m correspondingly. When the flow rate of circulating water in the heat supply network system increases by 1 m³/h, the buried pipe length can approximately decreases 50 m. When the matching relationship between the volume of the storage tank and the solar collector area is 60~80 L/m², the thermal storage efficiency of the water tank is highest in the short-term solar energy storage system.