Simulation And Analysis Of Cross Season Heat Supply Technology For Ground Source Heat Pump System In Severe Cold Area

In recent years,as a safe,energy-saving,environmental protection and efficient renewable energy utilization technology,heat pump technology has become increasingly mature and widely used,mainly due to the good energy-saving effect.With the increase of installed capacity and utilization rate of heat pump system,the energy consumption of heat pump system has been widely concerned.As the running time of the heat pump system increases,the energy efficiency of the heat pump system will gradually decrease.Through research,the energy consumption of heat pump system in winter operation is generally low in severe cold area,which is due to the long-term operation of heat pump system and the large heat intake from the ground,resulting in the decrease of the ground temperature year by year,while the temperature recovery ability of the ground itself is limited,which can not meet the long-term and efficient operation of the heat pump system.In this paper,TRNSYS software is used to simulate and analyze the building load of the office building in the cold area,and the selection methods of the unit,the buried pipe and the water pump in the ground heat pump system are systematically studied.The energy consumption of the ground pipe heat pump system in the severe cold area is simulated and analyzed.Based on this,the optimization of the heat pump system is studied.The running energy consumption of the heat pump system is simulated and analyzed under two heating modes: the solar energy system and the heat pump system in series and parallel connection,and the running energy consumption of the heat pump system in the heating tower.And change the operation time of the solar system in the parallel mode to optimize the system,compare and analyze the impact of different connection modes of the solar system on the system energy consumption,the temperature change of the soil in different conditions and the impact of the heating tower system on the system energy consumption in different conditions,analyze the effect of its heating on the soil and reduce the operation energy consumption of the heat pump system.The results show that cop is 4.2 in summer and 2.6 in winter.The cop of solar collector in series is 4.9 in summer and 3.08 in winter.The cop of solar collector plate parallel heat supplement system is 5.0 in summer and 3.19 in winter.The cop of the system is 4.0 in summer and 3.3 in winter.Through the economic research of three ways of heat supplement,the economic benefit of heat supplement tower is the mostobvious.Through the comparative analysis of different areas of solar collector panel heating effect,we can see that in the solar collector panel heating system,for the office building with a building area of 1280m2,210m2 solar collector panel heating effect has the largest economic benefit.To sum up,the heat supplement system of GSHP system can solve the problem of soil heat balance in the cold area,and can improve the cop of the heat pump system.The conclusion of this paper has a certain reference value for the application of solar ground source heat pump system in practical projects.