Analysis Of Operation And Simulation Of Solar Collector With Soil Source Heat Pump Heating System

The system of solar collectors combined with the ground source heat pump heating system has the dual advantages of environmental protection and energy saving, and because solar collectors can save up the wealthy solar energy into buried pipe, it can mitigate the soil temperature imbalance problem effectively, in recent years, this has received many scholars extensive research and attention.In our country the cold winter heating load is much larger than the summer cooling load, and the using of ground source heat pump system in the northern region only considering providing winter heating load, without centralized cooling in summer, so after many years taking the heat from the soil will make the soil temperature getting lower and lower, the heat pump's performance will decline. Solar collectors can only provide heat load, in summer solar energy is greatly wasted wealthy, and solar energy is intermittent and instability, it cannot meet the needs of the building load using alone, so in this paper we use solar collectors combined with ground source heat pump heating system.In this paper, with the Matlab/Simulink simulation analysis software, we build the system models of the combined heating system components respectively, when building the heat pump models, it ignores the heat energy loss of the components inside the unit because of only considering the operation of the system. Theoretical calculations of soil heat transfer using a cylindrical heat transfer and the establishment of soil heat exchanger model, build a model of the solar collector using the calculation of solar radiation, bases on the created models, analysis the run-simulation of energy-saving typical villa in Shenyang, and compare the operating efficiency under the different operating conditions of the system.This paper summarizes a number of studies in the field of home and abroad, analysis the efficiency in different flowing ways of circulating water, and different allocation ratios of solar collectors and the heat exchanger after the circulating water diversion. It works out that we can improve the efficiency of the heat pump when the circulating water through the buried tube heat exchanger firstly, then pass the solar collectors in series mode. The operating efficiency of the heat pump system can reach the max when the circulating water flow ratio of the buried tube heat exchanger reach 0.6-0.8 of the total water flow in parallel mode. Compare the series and parallel systems, for the purpose of concentrating solar collectors, heat pump system has a higher efficiency in series mode. Having a qualitative analysis for the efficiency of the heat pump system, then select the best suited program for the engineering design.