Shallow geothermal energy is under development with  improving collection efficiency and amount as goals. After years of research,  Ever Source Science and Technology Development Company limited promoted new collection  technology. That is Ever Source shallow geothermal energy collection technology  with single well circulating heating exchanger.

Ever Source geothermal energy heating pump system is  international original triple-supply system which is environment system for  heating in winter, cooling in summer and daily hot water supply.

Ever Source geothermal energy heating system is constituted  low-grade geothermal energy collection system with core technology of single  well circulating heating exchanger shallow geothermal energy collection,  low-grade geothermal energy promotion system with core technology of innovative  triple-supply promoter and high-grade geothermal energy system with same  operation principles of air-conditioning system. The three major parts  complement and support each other to build Ever Source geothermal energy  heating pump system.
           Ever Source geothermal energy heating pump system has three  configurations such as sealed clapboard type, maze type and closure type are introduced  here with importance on sealed clapboard type collection technology.
           1 sealed clapboard type (applicable to single layer coarse  gravel sandy soil)
           Water is pumped from suction space and sent to heat  exchanger at well head. After releasing heating energy, cooled water flows in  return space and level continues rising to constant water table. Pressure in  return space increases with the pressure of constant water level. At same time,  with decreased pressure on suction inlet, water in return space flows out and  back to suction space after exchanging heat with soil. Then, heated water is  pumped to heat exchanger at well head to give off heating energy.
           2 maze type (applicable to multiple layers fine aggregate  clay)
           Water is pumped from suction space through osmotic pipes and  sent to heat energy at well head. After giving off heat, cooled water flows  into gap between osmotic pipes and maze shape to exchange heat with water  saturated from pipes. Then heated water flows into suction pump to be pumped to  heat exchanger at well head to release energy.
           3closure type (applicable to no-water rocky soil)
           Water is pumped from suction space to flow to return space  after giving off heating energy in exchanger at well head or evaporator (cooler)  in pump. After absorbing heat from soil with closure heating exchanger, heated  water is pumped again to exchanger at well head to release energy.
           When well water releases energy, system operates in heating  work condition introduced above.

Since the first project with single well circulating heating  exchanger geothermal energy collection technology started in 2001, the system  drew public attention in heating pump field at home and abroad. It was highly praised  as 鈥渞eformative breakthrough of low-grade geothermal energy collection  technology鈥 by experts.

By the end of 2008, the technology has been utilized in 350  projects of six million square meters. The promotion area covers: Beijing, Tianjin, Tibet, Qinghai,  Sichuan, Yunnan,  Guangdong, Henan,  Hebei, Shandong,  Shanxi, Xinjiang, Inner Mongolia and Heilongjiang. The system  are available in  office buildings,  hospitals, schools, hotels, shopping centers, communities, villas, gymnasiums,  exhibition halls, swimming pools and outdoor temperature regulated scenery ponds.  The successful application of Ever Source single well circulating heating  exchanger shallow  geothermal energy  collection technology in such wide area indicates that shallow geothermal  energy is deserved to be first-choice alternative resource of buildings heating  and cooling system.
           There are different types of complicated geological  structure: pebble, gravel, coarse sand, medium sand, fine sand and clay. Soil  differs in many aspects: such as hydrous or not, single hydrous layer and different  hydrous layers. Underground water is complicated in mobility and flow velocity.  Thermophysical properties of soil indicate different energy collection indexes.
           With research and test of single well circulating heat  exchanger shallow geothermal energy collection system in a large number of  projects, Our Company made design proposals of shallow geothermal energy  collection heat changer in different area with various geological structures  and put in to production in scale.
           Taking Beijing area as example, 580KW low grade energy is  collected per square meter in the area with geological structure mainly made  from pebbles, gravels and coarse sand and 100t/h single well water flow, while  290 KW low grade energy will be collected per square meter in the area with geological  structure mainly made from powder sand, fine sand and coarse sand and 50 t/h  single well water flow.
           Besides development of single well circulating heating exchanger  shallow geothermal energy collection technology, Ever Source Science and  Technology Development Company Limited also utilizes different low grade energy  collection technology targeted at features of various projects such as collection  technology of water energy source in Taiyuan, Shanxi, the collection technology  of heating energy in cooling tower in certain electricity generation factory in  Shan dong, the collection technology of river energy in certain glass groups of  Shanghai , the heating collection technology of cooled water in certain Beijing  factory, the collection technology of water source of Dali lake in Yunnan  province, the collection technology of water source in Zhangzi island, Dalian  and vertical-pipes collection technology of shallow geothermal energy to build structure  of low grade energy collection system and develop application in the filed of  green grain reservation and agricultural equipments.
           Chart9 is geological histogram of different area in Tibet, Shanxi, Heilongjiang and Beijing.
           Table 6 includes relative indexes of heat exchanger of  energy collection system.