Research On Operational Characteristics Of Ground Source Heat Pump Based On Energy Balance In Severe Cold Area

Energy and environment are important factors that influence and restrict human development.people gradually realized the importance of protecting our environment and save energy in the 21 st century.Starting from the basic national conditions of domestic in our country, put forward the Scientific Outlook on Development and taking the road of sustainable development, and also set protect the environment and save energy as the basic national policy of our country for a long-term development.ground source heat pump system has the characteristics of energy-saving, environmental protection, comply with the requirement of long-term development strategy in our country, therefore widely used in people’s life.In this paper, we mainly study the application of the ground source heat pump system in the northern severe cold area of China.In the northern severe cold area of China,the winter building total heat load is far greater than the total cooling load in summer, so the energy around the Buried tube heat exchanger will be imbalance and the efficiency of the ground source heat pump will be down because of a long-term use of the ground source heat pump.The research based on the ground source heat pump system in the northern severe cold area of China with a solar energy auxiliary system. With the help of the solar energy auxiliary system for a long-term use of storage heat to realize the energy balance of the ground around the buried tube heat exchanger.The main contents of this paper include the following aspects:(1)Introduce the research background of ground source heat pump in our country, combining with the characteristics of the climate of our country, analysis of ground source heat pump system applied in northern severe cold area of China, and put forward a new type of ground source heat pump system;(2)With the use of the software EES(Engineering Equation Solver),write the model of compressor, condenser, throttle valve and the evaporator model of the heat pump, and through the experiment to verify the exactness of the model of heat pump system,and also analysis the operating characteristics of the new ground source heat pump system under different operating mode, Summed up the best operating mode of the new ground source heat pump system;(3)Through experiment and simulation, research on the operation parameters of the solar system effect on energy balance of the ground soil around the buried tube heat exchanger of the new type ground source heat pump system,summed up the best operation parameters of the solar system that maximize the system efficiency.