Investigation and evaluation of shallow geothermal energy resources in typical districts of Tangshan City
As a non-carbon based renewable energy source,geothermal resources have been widely developed and utilized because of its green,low carbon,stable and reliable characteristics,and under the guidance of the"double carbon"goal,China is accelerating the ex-ploration and development efforts.The hydrogeological and thermophysical parameters of the study area through on-site thermal response test,extraction and irrigation test,thermophysical statistics and analysis were obtained,and then the suitability of shallow geothermal en-ergy in the typical area of Tangshan City based on hierarchical analysis was evaluated,and the heat capacity,heat exchange power,ener-gy potential and ecological and environmental benefits of geothermal energy in the study area were estimated.The study shows that the average stratum temperature of shallow strata below 200 m in the typical area of Tangshan City is 14.71-16.09 ℃,and the average thermal conductivity is 1.56-1.88 W/(m·℃),and the study area meets the mining methods of groundwater and buried pipe ground source heat pump at the same time,and the proportions of suitable,relatively suitable,and unsuitable areas for groundwater source heat pumps are 27.8％,55.7％,and 16.5％,respectively;the proportion of suitable,relatively suitable,and unsuitable areas for ground source heat pumps with buried pipes is 82.56％,16.13％,and 1.31％,respectively;the summer cooling heat exchange power of shal-low geothermal energy in the study area is 3 024 800 kW,and the cooling area is 56.156 5 x 106 m2;the winter heating heat exchange power is 1 238 700 kW,and the heating area is 24.774 × 106 m2;it is estimated that through the development and utilization of geother-mal energy,34 000 t of coal can be saved annually,82 178 000 t of exhaust gas emission can be reduced,and about 90 579 400 Yuan can be saved in environmental management costs,with remarkable ecological and environmental effects.
shallow geothermal energyfield testhierarchical analysis methodsuitability zoningextraction methodTangshan City
万方数据
维普
