Assess On Suitability Evaluation Technology Of Water/soil Source Heat Pump In The Central Plains Region

There exist huge geothermal resources inside Earth.In the current technical conditions,the shallow geothermal energy resource is one of the most value energy resource of the Earth’s interior for development and utilization. In recent years,the development and utilization of shallow geothermal energy has become a trend.At present, the method of development and utilization of shallow geothermal energy resources is the groundwater source heat pump and ground soil source heat pump in the central plains region.Although the development of ground source heat pump technology is relatively fast in China, the suitability evaluation of water/soil source heat pump has not formed a systematic evaluation system.The main purpose of this paper is evaluation the suitability of water/soil source heat pump system in the central plains region.The primary task is to choose an effective evaluation method.And then,the scientific and effective evaluation indexes should be chosen, based on full account of the many conditions around the city hydrogeological conditions, groundwater conditions, soil thermal properties, and geology, etc. Finally, the table of regional suitability of ground source heat pump system in the central plains region are formed.After extensive study of this topic,obtained the following conclusions:(1) Groundwater source heat pump system partition evaluation indexes of suitability: water source、amount of groundwater levels dropped、mount of groundwater recharge、unit water yield、groundwater temperature、mineralized degree; Ground source heat pump system partition evaluation indexes of suitability:quaternary system thickness 、pebbly layer thickness 、constant temperature layer temperature、geotechnical temperature、consolidated thermal conductivity 、the total thickness of aquifer.(2)In the basis of evaluation index, we use Analytic Hierarchy Process and expert consultation questionnaire in this paper,calculated the relative weight value of each evaluation index in the study area, each evaluation index conducted standarding data with the different levels of the study area.(3)Drawn out the groundwater source heat pump suitability partition table and ground source heat pump suitability partition table of parts cities in the central plains region, initially identified shallow geothermal energy reserves is more abundant.in the central plains region.