Analysing Heat Accumulate In The Groud Heat Exchanger System Of Ground Source Heat Pump

Ground Source Heat Pump (GSHP) is a developing air-condition technology based on saving energy and protecting environment, which is one of the top national projects on air-condition and refrigeration. With the ceaseless using of GSHP, it brings new problems. Because the difference between taking heat in winter and letting heat in summer, accordingly it will result in heat accumulating underground after the system running several years.This text sums up the research and development actuality in the world and several typical modeling of the vertical GHEs, it aims at the geological condition of some area of Jiangsu province, analyzing the distributing of temperature field in vertical single U-tube GHEs.This text studies on temperature characteristic of the earth first, making sure the original temperature account formal of the earth; simulating the temperature distributing under the 75m of the earth in some area of Jiangsu province, analyzing the variational rule of the earth, the simulation result accords with the test result; and more simulating the whole underground temperature of the uptown in some area of Jiangsu province, analyzing the variety temperature trend year by year when the ratio of taking heat to letting heat is different, simulating the underground temperature after several years, compared with the original temperature, finding that the temperature will go up somewhat, the time which consume the heat underground is too long, it will bring some bad effects. At last, the text will give a project to solute the problem.