| Pingtan Comprehensive Experimentation Area is the national focus on the development of Free Trade Zone,as an island free trade area,the development of green environment is of great significance.Shallow geothermal energy as a new renewable energy to adapt to the development of Pingtan,in line with the national energy conservation and environmental protection strategic thinking.At present,there is no suitable division of development and utilization of shallow ground temperature in the Pingtan Comprehensive Experimental Area,that constraining the use of Science,High-Efficiency,Sustainable Development,and Ground Source Heat Pumps for Shallow Geothermal Energy.The collation and analysis of the natural geography,geology,hydrology geology,geothermal field data,combined with the In-situ Thermal Conductivity Test,Pumping Test and Reinjection Test,using AHP the following indicators are selected:recharge capacity,water rich,aquifer thickness,environmental geological conditions,scale,corrosion,salinity and thermal property indicators to study areas of development and utilization of groundwater heat pump and ground-coupled heat pump suitability zoning,finally,quantitative evaluation of shallow geothermal energy development and utilization potential in the study area.In the selected evaluation factor,the weight of the ground source heat pump is also relatively large,and the weight of the impact is also small.By means of researching and analyzing,the good suitable area of ground water source heat pump is 51.67km~2,the area of moderate suitability is 88.32km~2,The area of bad suitable is 131.69km~2.The groundwater heat pump good suitability area and moderate suitability area distributed in Luyangpu,eolian plain and marine plain of Liushui and coastal zone of Tannan Bay?Gold Well Bay,aquifer to medium sand,fine sand,groundwater recharge conditions,single well discharge is large,recharge high capacity;The good suitable area of ground-coupled heat pump is 97.15km~2,the area of moderate suitability is 42.68km~2,The area of bad suitable is 131.86km~2.Ground-coupled heat pump good suitability area and moderate suitability areas are mainly distributed in the quaternary aeolian plain and coastal plain ground,good suitability and suitable for upper secondary area of quaternary iiiunconsolidated rock strata,based on fine particle,especially to drilling mud and muddy soil and sand.The initial ground temperature of study area is 22.9-25.4?,the roof position of the thermostat band is 10-15m,The temperature range of the constant temperature band is21.31-24.40?,the mean temperature is 22.1?.The heat capacity of shallow geothermal energy is 2.77×1013 kJ/?.In consideration of land use coefficient,good suitability and moderate suitability area of potential evaluation can be obtained in winter heating area:4.53×10~6m~2,the summer cooling area:1.41×10~6m~2,with considerable economic.In order to provide scientific basis for the development and utilization of ground source heat pump in Pingtan Comprehensive Experimentation Area. |
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