| With the increasing energy and environmental problems,changing the energy structure and promoting large-scale application of renewable energy have become an important task of social and economic development.The ground source heat pump,which uses the renewable geothermal energy,has attracted people’s attention and has been widely used.The government of Baoji proposed to vigorously develop the application proportion of renewable energy in buildings locally,and the proportion of the renewable energy in buildings is hoped to be 20% of the total energy in 2020.In this context,it is necessary to evaluate the suitability of the local application of the ground source heat pump.This paper is about the application of ground source heat pump in buildings in Baoji.Based on the theory of buried tube heat transfer and groundwater seepage and according to the natural conditions of city and urban construction planning,the suitability of the local application of the ground source heat pump is evaluated through the geotechnical thermal response test,the underground water source heat pump running pumping test and the local hydrogeological survey and other methods.In this paper,the geotechnical thermal response test is made by drilling wells in Panlongyuan and the thermal response information is collected to get the shallow geotechnical thermal physical parameters in Baoji.On the basis of these parameters,the heating ability of buried pipe on river bed is evaluated and the soil source heat pump energy station is arranged,including the buried pipe on river bed and under green space.Through a long time testing about two underground water project(the Traffic Police Detachment and Huaxia Ecological District),we deduced the groundwater seepage model and the seepage flow model,the seepage coefficient,the attenuation coefficient of seepage coefficient,the amount of water inflow and the groundwater level were studied by detecting the data and seepage flow theory.Single well heating and cooling capacity were analyzed and evaluated.Finally,the feasibility of application of surface water source heat pump system in Baoji City was analyzed.Through the research,we get the conclusion as follows.(1)The coefficient of comprehensive thermal conductivity in Panlongyuan is 1.3497 W/(m·K)and the coefficient of comprehensive thermal conductivity of other groups is about 2.0 W/(m·K).The various groups are well suited for the development of soil source heat pumps.(2)The underground water source heat pump system is not suitable for Panlongyuan,but it can be used in other areas.(3)The surface water source heat pump is not suitable to widely used in Baoji because of the less annual rainfall and large sediment concentration in water.(4)The maximum heat exchange of a single well of underground water source heat pump,except for the group in Panlongyuan,can reach 87.08~348.34 KW or 174.17~348.34 KW.The research results in this paper can be helpful for formulation the application of renewable energy in Baoji.And the results have a certain guiding significance for the evaluation of the suitability of urban renewable energy. |
