Experimental And Study On Operation Characteristics Of Ground Source Heat Pump And Radiation Terminal In Hot Summer And Cold Winter Area

With the improvement of people's living standard, the demand of high-end residential villa for comfortable air-conditioning is growing, too. Fortunately, radiation air-conditioning system can meet this demand, at the same time; it can solve some comfort and health problems of the traditional home air-conditioning in varying degrees. Ground-source heat pump technology makes full use of the shallow geothermal energy and by consume of small amounts electricity for the indoor heating / cooling. It attracts people's attention for its benefits such as small footprint, no pollution, and lower power consumption in running and low cost and so on. Heat Pump Technology combined with Irradiation air-conditioning system for the room warm and cold has many benefits, such as the higher seasonal average COP of ground-source heat pump, the better ability of soil heat storage, and can ease the serious contradiction of cooling/heating capacity with the ambient temperature fluctuations existed in air-source heat pump and so on. At present, especially in the north, many buildings use ground-source heat pump + radiation termination, but in Hangzhou which in hot summer and cold winter area, it is not very common for this system. Ground Source Heat Pump + floor/ ceiling radiation + displacement ventilation system are even fewer in the engineering practical application. In this paper, by studying the project results of this system in practical villa and the experimental analysis, we provide reliable data for its promotion and application. The research results of the heating characteristics of the system has been made, so in this paper, we mainly do some experimental for summer cooling conditions. Select the ground source heat pump+ radiation air-conditioning system of a villa in Hangzhou, choose four typical rooms to carried out a detailed analysis on temperature changes in radiating; Calculated and analyzed the radiation heat transfer of the floor and the room comfort; do some calculation of the ground pipe heat transfer and analysis the matching degree of the host and the pipe. This article also used two-parameter estimation method and geotechnical slope method according the line heat source model to calculate the thermal parameters. Through the comparison of these two methods, the best data processing mathematical method of geotechnical thermal response parameters was obtained.