Experimental Research On Ground Source Heat Pump With Horizontal Buried Pipes Heat Exchanger In Summer Cooling And Winter Heating

This paper is a part of national natural science fund item- Summer Cooling and Winter Heating dynamic traits research of underground energy-keeping system the house in Summer Cooling and Winter Heating area, mainly task is the experimental research of Ground source heat pump Systems with horizontal buried pipes.This article carried out the experiment spending nearly one years from July 7 on 2000 to June 11 on 2001 . This experiment include many contents ,in a word , that is summer condition experiment, winter condition experiment > summer-winter transition condition experiment and winter-summer transition condition experiment, furthermore summer condition experiment still include flux changing experiment and winter condition experiment still include thermal balance experiment This article dealt with the data of the test, calculating out energy absorbing(energy discharging) of buried pipe in winter condition (summer condition) , input power of heat pump x heat exchanging of piece buried pipe length x co-efficiency performance桟OP(energy efficiency rate桬ER) and average heat exchanging coefficient; in additiont this article compares the inlet water temperature and outlet water temperature of underground the first layer and the second layer buried pipe when heat pump was running, the results are that the heat exchanging ability of the second layer buried pipe outgos the first layer buried pipe, and heat exchanging is more stable; and still analyse earth temperature resuming in the transition season .the results are earth temperature resume fast in the first week when the heat pump runs off. Changing flux running indicates that flux fiercely affects heat exchange ability of underground buried pipe.This article establish horizontal heat exchanger model and ground temperature renewing in transition season with adoption of energy balance theory and combination thermal conduction equation and reference of VC.Mei model, and process simulation and calculation with the methods of finite difference, and the value of testing accords with value of calculation very well.At last, the paper uses the results of experiment to design a suit of horizontal GSHP systems for a set of ChongQing villa, and describes the attention things in the construction of the systems.