The Optimizing And Application Of The Response Test Method For The Ground Source Heat Pump

With the continuously development of Chinese architecture, the requirement to the building energy conservation becomes higher and higher. Reducing the air pollution by down sizing the energy usage of the air condition system in winter for heating has become the goal in all building energy saving and HVAC staff's heart.Ground and water resource heat pump heating and air conditioning system is a high efficient recycling, non-pollution technique which can both provide cooling and heating to a building. It works process as: a. absorbing heat from earth in winter to provide heat to building; b. releasing heat to earth in summer to absorb heat from building,both a and b process were triggered by the heat pump machine system. The characteristic of its energy conservation and environmental protection is according with the national goal of the building energy saving harmony society, so it is expected to have a bright future in china.The heat exchanger research is always the most difficult point of the ground resource heat pump study while it is the base and core technique for application. Based on the former study, this paper set Anding hospital as an example, did a heat responsive test by sinking well and analyzing the data. With the analysis to the earth heat transfer characteristic, this paper has done a calibration and optimization to the well sinking project in the aspect of well depth, distance. Etc.With the test for the well of Anding hospital heat pump system, the data for the original underground earth average temperature is set as 15.0℃, the average earth heat transfer coefficientλis set as 1.698W/m/K. Calculation with the ground resource pump heat exchange calculate soft ware Earth Energy Designer 2.0, this paper get the result that there should be 840 underground heat exchanger, the style should be double U, vertical burying, rectangular arrangement, the average distance is 5m, effective depth is 120m. at the same time, the 25 yrs temperature simulation for the underground heat exchanger was conducted to predict the unbalance heat distribution which can provide reference for the system efficiency improvement.With the study of this topic, an optimized heat responsive test method was provided. The earth heat transfer parameter was get from the test. Based on the real project example, the system was calibrated and optimized; it will be helpful to other projects.