| As a kind of energy saving technology, Ground source heat pump has gradually formed the scale of the promotion in our country. During ground source heat pump engineering practice, due to the cold, heat load imbalance and other issues have led to many ground source heat pump in the application can not achieve energy saving, cost savings in mind. This paper use a project in Jinan area as an example, which mainly used in ground source heat pump heating, gas boiler heating auxiliary, explore temperature change of underground soil and its influence on system performance, and the optimal operation scheme of the scheme is given.Firstly simulate the load of buildings by DeST simulation software,get the annual load of the building, then import data into GeoStar. Through the GeoStar to simulate the ground temperature change under the influence of long-term heat load imbalance in the existing engineering example. Obtained change curve of system operating efficiency under different temperature. Then according to the system operation efficiency of the optimum conditions to get optimal ratio of cooling and heat load in central air conditioning system, and the proportion of the auxiliary heat source of the ground source heat pump in the area of heat load is dominant.There are many similar projects in Shandong Province, which is only building heating in the winter, cooling load in summer is very small or no cold load at all. So winter heating scheme using ground source heat pump and auxiliary heat source heating. But there are no relevant research on how to run the system and how to determine the auxiliary heat capacity.The research in this paper can provide reference for similar projects, and it can greatly improve the economic performance of the system. |
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