淮安城市规划区浅层地热能开发利用适宜性分区及潜力评价

Suitability zoning and potential evaluation of shallow geothermal energy development and utilization in Huai’an

浅层地热能是一种清洁的可再生资源,合理开发利用浅层地热能可以有效减少化石能源使用,助力实现“碳达峰”“碳中和”目标。从水文地质特征、岩土体结构特征、热物性特征、热响应特征、地温场特征等多个方面进行分析,基本查明了淮安城市规划区浅层地热能赋存条件,并在此基础上采用层次分析法进行了浅层地热能开发利用适宜性评价。评价结果显示,规划区广泛适宜采用地埋管地源热泵系统开发利用浅层地热能,适宜性良好区和较好区面积总和2335 km^(2),占规划区总面积的 73.3%。资源量计算结果显示,规划区浅层地热能储量丰富,100 m 深度范围内热容量为9.25×10;k J·℃;冬季总换热功率为32 766 MW,可供暖总建筑面积为5.14亿m;夏季总换热功率为45 793 MW,可制冷总建筑面积为3.86亿m^(2),开发利用潜力巨大。

Shallow geothermal energy is a clean and renewable resource.The rational development and utilization of shallow geothermal energy can effectively reduce the use of fossil energy and help achieve the goal of "peak carbon dioxide emissions" and"carbon neutrality". Analyses from various aspects such as hydrogeological characteristics, rock and soil structural characteristics,thermal physical properties, thermal response characteristics, and geothermal field characteristics, have revealed the conditions for the occurrence of shallow geothermal energy in the urban planning area of Huai’an. On this basis, the analytic hierarchy process is used to evaluate the suitability of shallow geothermal energy development and utilization. The evaluation results show that it is widely suitable for the development and utilization of shallow geothermal energy in the planning area to adopt the ground source heat pump system with buried pipes. The total area with good suitability is 2335 km~2, accounting for 73.3% of the tota area of the planning area. The resource calculation results show that the shallow geothermal energy reserves in the planning area are abundant, and the heat capacity within a depth of 100 m is 9.25×10;kJ·℃;. The total heat exchange power in winter is32 766 MW, and the total building area that can be heated is 514 million m~2. The total heat exchange power in summer is45 793 MW, and the total building area that can be cooled is 386 million m~2.There is huge potential for development and utilization.