U-vertical Ground Heat Exchanger Of Ground Heat Pump Design And The Experimental Research Of Movement Strategy

Air conditioning created the comfortable environment for life and working. Also it consumed a great deal of mineral material, broke the atmosphere ozone layer, causing the weather to become warmer and warmer. Keep on the development of the air condition, it is necessary to carry on the innovation .The ground-source heat pump is a kind of new technique for air conditioning, and it is efficiently and the environmental protection economy energy technique.GSHP is more important in our country as new energy. Therefore, the technical research results for GSHP have wonderfully foreground in China. Its application will produce the important economic performance and social performances.The research of ground source heat pumps is mainly about the theories studies and experiments in our country, and lack of the research on GSHP and building's matches. It's also an important reason that the first cost of ground source heat pump system is too expensive to affect the expansion.The cost of boreholes is half of the total expenses.Therefore,the design of ground source heat exchanger is the most important.If the length of the borehole was too long ,it could increace the investment,or too small not to satisfy the loads.So, the subjects focus on the research of vertical U-Tube heat exchanger ground source heat pumps. First, the subjects elaborate systematically the simulation of ground heat exchanger. On the base of theories, The author make use of the experiment data to verified to imitate the accuracy of result in summer, then, analyzed the load characteristics of different region, get the principle of the cold and hot source design, and combine to a capacity design formula of auxiliary cooler when summer puts the quantity of heat is bigger than the winter heat absorption. To take Beijing as an example, pass to analyze the main factors affecting ground heat exchanger to exchang heat, and simulate U-vertical ground heat exchanger minimum borehole spacing, heat transfer ability of single and double U-vertical ground heat exchanger, the thermal conductivity of the ground the thermal conductivity of the fill material affecting to the heat transfer ability of ground heat exchanger ,etc. We got the result that heat transfer ability of double U-vertical ground heat exchanger isl.5 tunes as much as single U-vertical ground heat exchanger in winter, and it is two times as much as single U-vertical ground heat exchanger in summer. At the same time,we have gotten a formula of the heat flux a meter of ground heat exchanger and the thermal conductivity of the fillmaterial. Through the different movement pattern under at the first cost and the operating cost comparison, obtains the system energy conservation movement strategy that satisfies the work construction indoor temperature under the design operating mode by the use of ground temperature restoration. The design and systematic operation basis are offered for the further application of GSHP.