Ground Source Heat Pump Operating Characteristics Of Underground Heat Exchangers

Ground source heat pump is an energy saving technology for heating and cooling in the use of shallow soil energy, with the global energy crisis and the emergence of issues, environmental the technology at home and abroad in recent years of research. Winter and summer load imbalance when the soil source heat pump ground heat exchangers running in winter to draw heat from the soil and summer heat released to the imbalance in the soil, the amount of excess heat or cold will accumulate in the soil, the average temperature in soil increased or decreased, the ground heat exchanger will reduce the exchange of heat.Based on from home and abroad ground heat exchanger heat transfer model, to analysi the ground heat exchanger of heat transfer theory, drill the holes to heat exchanger area is divided into two areas within and outside the drill as the boundary wall.the ground heat exchanger area is bounded by walls of the borehole and drilling boreholes exceptionally outside the two regions, consider access to water borehole and heat transfer between the thermal asymmetry of interference, establishment of steady-state analytical models. Drilling to establish the external two-dimensional Cartesian coordinate system of non-state heat conduction model.Two-region model established through the hole in the wall temperature coupled mathematical model of heat exchanger.To build the experimental platform of ground heat exchanger, continuous operation of the system according to test results, get the ground heat exchanger unit for heat pipe changes, using experimental data verify the establishment of a single U ground heat exchanger model.On the basis of heat transfer model, analysis of ground heat exchanger, heat transfer out of the inhomogeneity of water, simulation of the four typical building load characteristics on the ground heat exchanger operational characteristics, ground heat exchanger can be defined using temperature and temperature recovery rate can be used on soil temperature characteristics were analyzed, typical city of different climatic zones to simulation heat exchanger run features throughout the year.