【作者】 阮强；

【导师】 姚磊华；

【作者基本信息】 中国地质大学（北京） ， 地质工程， 2011， 硕士

【摘要】 浅层地热能资源的开发利用是以地下水及地埋管换热系统的地源热泵技术为媒介,将地表下200米深度范围内的清洁、可再生的低品位能源转化为无污染、可持续循环利用的高品位热能;另外,浅层地热能资源储量巨大、可就近利用等特点使得其作为一种新型能源利用方式逐步在国内外广泛推广使用。然而,在对其进行开发利用之前,由于并未对开采区域进行系统的调查评价,使得在利用过程中出现了利用效率降低、环境污染等一系列问题。因此,开展区域性的浅层地热能调查评价工作已显得十分必要。本文在总结浅层地热能利用研究现状及发展的基础上,通过深入研究开封市城区的地质概况、水文地质条件,并结合研究区的实际情况及存在的具体问题,利用AHP-层析分析法,建立了适合开封市城区的地下水源热泵及土壤源热泵的适宜性区划评价指标体系。并运用MATLAB编制浅层地温能综合评价层次分析法(AHP)程序,建立开封市城区地下水源热泵及土壤源热泵权重体系。利用GIS“DTM分析”及“属性库管理”等功能模块对各评价因子进行矢量化、分区及属性赋值,建立各要素图层文件。通过“空间分析”模块对各评价因子图层进行叠加并提取生成文件属性数据,结合综合评分方法,将适宜性区划结果划分为适宜区、较适宜及不适宜区3等级,并将区划结果进行GIS可视化输出,最终实现开封市城区地下水源热泵及土壤源热泵适宜性区划评价。依据体积法计算原理所需物理参数及钻探资料,结合研究区实际情况,将热储层划分为砂层、粉土层及粉质粘土层;根据GIS“DTM分析”及“属性库管理”模块功能,对研究区各层计算参数进行拟合插值,获得区域性各层物理指标属性库,根据属性数据计算包气带及饱水带各热储层不同赋存形式的热容量值,最终通过叠加实现开封市城区浅层地热容量计算评价。根据地埋管换热功率及岩土热物性参数反算原理,通过对现场实验数据整理分析获取岩土体热物性参数,进而求取地埋管换热器传热系数并计算单孔换热功率值,最终获取整个研究区地埋管换热功率。此次调查评价工作为以后的深入研究打下基础,并为该地区以后开展和制定浅层地热能资源管理、环境保护方针政策提供重要依据。更多还原

【Abstract】 Relying on the ground-source heat pump technology including groundwater and pipe heat exchanger system, shallow geothermal energy resources are exploited and utilized by converting the clean and renewable tow taste heat guahtity ranging from earth surface to two hundred metres to the pollution-free and sustainable high taste energy; in addition, the features of great reserves and on-site utilization make this new sources of energy form widely expanded and used worldwide. However, a series of problems like decreasing efficiency and environmental pollution arise in the development of shallow geothermal energy resources for not having investigated and evaluated the exploration area systematically before utilization. Thus, it seems absolutely necessary to carry out regional investigation and evaluation of shallow geothermal energy resources in work areas.Based on the current situation and the progress of shallow geothermal energy resources research and considered the situation and issues in Kaifeng city, this article has made a full study of geological conditions and drogeological conditions in research area, then builds two suitability regionalization evaluating systems and two weight systems of groundwater-source heat pump and ground-source heat pump of Kaifeng area respectively by using AHP methods and making AHP program of comprehensive evaluation of the shallow geothermal energy through MATLAB software.The function of the DTM analysis and management of property base etc of GIS is applied to vectorize and partition all of the evaluating factors and assign the attribute for the graphs of these factors. Then all the graphs are superposed to generate new files, the attribute data are abstracted by the function of spatial analysis module and according to the comprehensive evaluating method, the research area is partitioned into three different types: most suitable zone、suitable zone and worst suitable zone and output by the means of GIS visualization. Finally, the suitability regionalization evaluation of the groundwater heat pump and gourd source heat pump of Kaifeng city is achieved. According to the necessary physical parameters of Volumetric Method and drilling data and based on the current situation in research area, thermal reservoirs are divided into sand layer、silt layer and silty-clay layer. The physical parameter attribute base of different layers in research area is established through interpolation of the parameters of different layers by using the function of DTM analysis and management of attribute base modules of GIS. Thus, the shallow geothermal capacity both in the zones of vadose and saturation of different modes of occurrence is calculated based on these attribute data. at last, the calculation and evaluation of shallow geothermal capacity in Kaifeng area is achieved through superposing of these geothermal capacity values of different types.The heat transfer coefficient of pipe heat exchanger is completed on the ground of principle of heat exchanger power and calculation of thermo-physical parameters of soil and gained by analyzing of these thermo-physical parameters via experimental data. Based on the heat transfer coefficient, the single hole heat exchanger power and the power values in whole research area are evaluated.The investigation and evaluation work lies a firm foundation for the future research and provide great value of basis for the development and establishment of shallow geothermal energy resources management and environment protection policies in this area.更多还原