广安市主城区浅层地温能赋存特征及地下水源热泵适宜性分析

Analysis on the occurrence characteristics of shallow geothermal energy and the suitability of groundwater source heat pump in the main urban area of Guang’an City

浅层地温能的开发利用有助于优化区域能源结构、提升环境质量。为了掌握广安市主城区浅层地温能的赋存特征及其适宜性,为广安市对浅层地温能的开发利用提供科学依据,以广安市主城区为研究对象,根据已取得的资料和测试数据,并通过对研究区内浅层地温能赋存条件及特征的研究,应用层次分析法对研究区进行地下水源热泵适宜性分析评价。研究结果表明:基于层次分析法的评价模型,建立了目标层、属性准则层(3个属性准则)和评价要素指标层(7个评价指标),构建出各层次的判断矩阵,并通过一致性检验,所构建的评价模型符合实际;由于研究区的含水层富水性差、含水层渗透系数小、地下水水质差,地下水源热泵适宜性差;评价结果对研究区地下水源热泵的开发利用具有科学的指导性。

The development and utilization of shallow geothermal energy can help optimize the regional energy structure and improve the environmental quality.In order to grasp the occurrence characteristics and suitability of shallow geothermal energy in the main urban area of Guang’an City,and provide a scientific basis for the development and utilization of shallow geothermal energy in Guang’an City.Taking the main urban area of Guang’an City as the research object,according to the obtained data and test data,and through the research on the occurrence conditions and characteristics of shallow geothermal energy in the study area,the analysis and evaluationof the suitability of the groundwater source heat pump in the study area is carried out by using the AHP method.The research results show that:based on the evaluation model of AHP,the target layer,the attribute criterion layer(3 attribute criteria)and the evaluation element index layer(7 evaluation indicators)are established,and the judgment matrix of each level is constructed,and the consistency test,the constructed evaluation model is in line with the actual.Due to the poor water-rich aquifer,low permeability coefficient of aquifer and poor groundwater quality in the study area,the suitability of groundwater source heat pump is poor;the evaluation results have scientific guidance for the development and utilization of groundwater source heat pump in the study area.