Application And Simulation Analysis Of Solar Energy Seasonal Heat Storage And GSPH Compound Heat System

The thesis uses DeST to simulate yearly cooling and heating load for a project in Jinan. The biggest cooling load is 312.9kw; the biggest heating load is 293.8kw. But because of heating time far more than cooling time, annual cumulative exhausting heat quantity is 166,478kw.h, with 210,385kw.h drawing heat; in other words, annual heat consumption is more than refrigeration consumption. The unbalance rate is 20.9%.The thesis describes traditional ground source heat pump system program, existing 19 program and volume-type solar energy compound system program The operational control model of three programs is simply presented. Then according to above system programs dynamic models are established to simulate and evaluate in the TENSYS.The initial temperature of soil heat retainer is 15.5 ℃. Traditional ground source heat pump system operates constantly for twenty years. The lowest temperature is 12.7 ℃, reducing 2.8℃ with the decreasing amplitude of 18.1%. After five years ground the average outlet temperature of ground source side of the unit has almost reached 2℃, unit may stop operating and go into protection state. As a result, through simulating existing solar energy compound system we find that this system operates constantly for 20 years because of recharging solar energy. The average ground temperature always remain stable fluctuation range of 14.8℃～16.2℃. The thesis accordingly comes up with a new solar energy compound system-volume-type solar energy compound system. The system operates for twenty years. The average ground temperature always remain stable fluctuation range of 15.9℃～17.2℃. The average ground temperature increases by about 1.1℃.In the end, test ground source heat pump system of a practical project and obtain a large amount of measured data. Through comparing measured value of supply and return water temperature on the side of ground source with those simulation values, and calculating we found that relative error of most values remains between 5%～20%, so as to verify the validity of the model established by TRNSYS.The research results show that soil heat storage system based on GSHP volume-type solar energy has a good heat storage capacity, and improves the solar thermal utilization rate, effectively solving the cold and heat imbalance problems in the cold region with more drawing heat in winter and less releasing heat in summer. It is an important way to resolve heating in cold areas...