唐山市典型区浅层地热能资源调查评价

Investigation and evaluation of shallow geothermal energy resources in typical districts of Tangshan City

地热资源作为非碳基可再生能源,因其绿色低碳、稳定可靠等特点被广泛开发利用,在“双碳”目标指引下,我国正加快勘查开发力度。通过现场热响应试验、采灌试验、热物性统计与分析,获取研究区水文地质及热物性参数,基于层次分析法对唐山市典型区展开浅层地热能适宜性分区评价,估算求得研究区地热能热容量、换热功率、资源潜力及生态环境效益。研究表明,唐山市典型区200 m以浅平均地层温度为14.71~16.09℃,平均导热率为1.56~1.88 W/(m·℃),研究区同时满足地下水及地埋管地源热泵开采方式,地下水地源热泵适宜区、较适宜区、不适宜区占比分别为27.8%、55.7%、16.5%;地埋管地源热泵适宜区、较适宜区、不适宜区占比分别为82.56%、16.13%、1.31%;研究区浅层地热能夏季制冷换热功率为302.48万kW,制冷面积为56.1565×10^(6) m^(2);冬季制热换热功率为123.87万kW,供暖面积为24.774×10^(6) m^(2);据估算,通过地热能开发利用每年可节约煤炭3.4万t,减少废气排放8.2178万t,节约环境治理费用约9057.94万元,生态环境效果显著。

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 exploration 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 energy in the typical area of Tangshan City based on hierarchical analysis was evaluated,and the heat capacity,heat exchange power,energy 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 shallow geothermal energy in the study area is 3024800 kW,and the cooling area is 56.1565×10^(6) m^(2);the winter heating heat exchange power is 1238700 kW,and the heating area is 24.774×10^(6) m^(2);it is estimated that through the development and utilization of geothermal energy,34000 t of coal can be saved annually,82178000 t of exhaust gas emission can be reduced,and about 90579400 Yuan can be saved in environmental management costs,with remarkable ecological and environmental effects.