湖南省浅层地温能资源调查与评价

Survey and evaluation of shallow geothermal energy resource in Hunan Province

为了推动湖南省的浅层地温能开发,针对湖南省13个地级城市开展了地质、水文地质、地热地质勘察、钻探和相关实验,对浅层地温能的赋存条件、资源量、开发适宜性进行了调查评价。结果表明,湖南省平均大地热流值为59.31 mW/m^2,低于全国平均值。空间分布为南高北低、东高西低,中部为高低相间,局部有异常圈闭的区段,显示出复杂构造的影响。湘中南的瓦屋塘—白马山岩浆岩带和湘南姑婆山—金鸡岭—骑田岭—热水岩浆岩带热流密度大于80 mW/m^2。湖南省绝大部分地区适宜建设地埋管地源热泵系统。仅在常德、岳阳、益阳、株洲等松散岩类孔隙水的分布地区有地下水地源热泵适宜区。湖南省13个地级城市规划区浅层地温能总热容量为6.93×10^15 kJ/℃,冬季总换热功率为1.00×10^8 kW,夏季总换热功率为1.39×10^8 kW。建议湖南省发达地区尤其是长株潭城市群新建城区建设地埋管地源热泵系统,大力发展浅层地温能。

For the promotion of shallow geothermal energy development in Hunan province,geology,hydrogeology and geothermal geology surveys,drilling exploration,and experiments were conducted in 13 cities to evaluate existing conditions and resource quantity,and development feasibility.Results showed that the average geothermal flow value in Hunan is 59.31 mW/m^2,lower than the average value in China.Considering spatial distribution,the geothermal flow is higher in the south and east Hunan and lower in the north and west Hunan,and high value alternates with low,with local anomaly zone,showing the influence of complicated tectonics.Wawutang—Baimashan magmatic rock belt in the center Hunan province and Guposhan—Jinjiling—Qitianling—Reshui magmatic rock belt in the south Hunan province have a geothermal flow higher than 80 mW/m^2.Most part of Hunan province is suitable for installation of ground-source heat pump of pipe heat exchanger.Groundwater heat pump systems are only suitable in area with loose-rock porewater in Changde,Yueyang,Yiyang and Zhuzhou.The total shallow geothermal capacity of Hunan is 6.93×10^15 kJ/℃.The total heat exchange power of the heat pump system is 1.00×10^8 kW in winter and 1.39×10^8 kW in summer.It is recommended to install ground-source heat pump systems for new urban areas espeially in Changzhutan metropolitan area.