The Application Of Ground-Source Heat Pump System Under The Thegeology Condition In Chanba

Building energy consumption accounts for 19.12% of the total energy consumption of the whole society in our country now,air conditioning energy consumption accounts for 40% of the whole building energy consumption,and the proportion of air conditioning energy consumption is growing.Reduce building energy consumption is of great significance for the energy conservation of the whole society,while reduce energy consumption of air conditioning helps to achieve the goal of energy saving.Because of the characteristics of high efficiency and energy saving,ground-source heat pump technologyby get the favour of the people.Depending on the difference of energy use,ground-source heat pump system can be subdivided into ground-coupled heat pump,surface water heat pump and groundwater heat pump.This paper studied the air-conditioning system of a particular project in Chanba,which adopts the ground-coupled heat pump system.The study of actual project has practical significance.This research starts from four aspects:(1)The applicability of the system is analyzed with the geological condition of Xi'an City,the hydrogeological conditions and the comprehensive thermal conductivity coefficient of the project site;(2)In the project of winter heating operation of air conditioning system,periodic testing of the underground soil temperature and the subjective evaluation of indoor comfort where buried the tube heat exchanger;(3)The system model is built by using TRNSYS software,simulated the change trend of buried underground soil temperature where the ground of heat exchanger area when the system operation under rated condition.Then compared with the actual measured data when the system operation under rated condition;(4)Simulated two kinds of systems which operation to take thermal balance measures and did not take the heat balance measures,and the temperature rise of underground soil after long term operation of two systems.