Research On Supers Hallow Geothermal Energy And Its Application Technology

Super shallow geothermal energy can widely exists in the earth’s surface.In the winter, the tempreture of frozen soil is much higher than the ambient air temperature. In cold areas, the temperature difference is more evident. Therefore, t he shallow geothermal energy would be the more rich.When shallow geothermal energy grades low, it cannot be used in power generation, industrial heat, etc.However, building heating, air conditioning energy grade and grade of shallow geothermal energy are very close,so shallow geothermal energy ground can be applied to building energy system, will achieve significant economic results.Aiming at building economy energy systemand energy saving, this paper probes into the shallow geothermal energy which can be applied to the practical method of building energy systems. It is believe that will shallow geothermal energy ground and air source heat pump, the combination of the winter low temperature heat source of shallow geothermal energy ground can be used as air source heat pump,whicle summer of shallow geothermal energy ground can be used as air source heat pump cold source. improving the heating coefficient of heat pump in winter and the refrigeration coefficient of refrigerating machine in summer is the best w ay to shallow geothermal energy.According to the above ideas, based on the reference of existing research results, this paper discusses the application method of shallow geothermal energy ground to build the application solutions. The research results sho w that the summer can reduce air conditioning refrigerating machine power consumption by 6 0%, winter to reduce heat pump power consumption by 20%, energy-saving effect is remarkable.This article expounds the shallow geothermal energy can should belong to "super shallow geothermal energy", compared with the traditional concept of "shallow geothermal energy", this article focuses on the 2 times the frozen soil depth below the surface.Because the depth is shallow geothermal energy, so can take system more shallow geothermal energy buried depth.More shallow geothermal energy buried depth on the one hand, greatly cut down the cost of the project construction, at the same time, natural alternation of seasonscan make the formation temperature satisfied recovery, avoiding the traditional ground source heat pump "cold accumulation" or "heat accumulation.On the basis of theoretical research, a certain office building as an object in qinhuangdao is selected, specificly, the land of shallow geothermal energy ground equipment selection- air source heat pump system is disscussed as a design work.In order to extract the shallow geothermal energy,this paper applicied the theory of fluid mechanics and concrete calculation of fan air pressure and flow rate and buried heat pipe length,which gives an the relationship between buried for engineering practice site and provides a specific data base.Another important part of shallow geothermal energy is the design of buried heat exchange.It is to belong to more complex heat transfer problem, the author will further study in the future work as this paper does not involve buried heat exchanger coil design problem in research.