唐山地区水源热泵群井抽灌数值模拟研究
发布时间：2018-12-11 02:14
【摘要】：目前全球范围内都在积极研发污染少、能耗低的可再生能源，而其中浅层地热能资源的开发与应用就成为了比较前沿与热门的研究课题。在我国就有将近31个省、自治区、直辖市有开发利用浅层地热能的相关项目及研究。在省级项目《唐山市浅层地热资源应用与研究设计》的支持下，以及河北省唐山市第二地质大队的大力配合下，本文开展了唐山市群井抽灌系统的数值模拟研究。 在研究区域唐山市丰润区现有项目工程－乡居假日周边进行了热物性试验，测试得到研究区域地层的平均温度与平均导热系数。同时，研究区域设置了22口监测井，并在2014年进行了长期监测工作，记录了大量研究区域地下水的温度变化情况。再结合研究区域的地层条件与水文地质条件，建立了该研究区域群井抽灌系统的三维水热耦合数值模型。 乡居假日群井抽灌系统从2011年开始运行，现将场地2014年的实际监测数据与2014年的模拟结果进行比较。对比分析显示模拟结果与研究区域地下水的实际温度相吻合。从而验证了所建三维水热耦合数值模型的准确性。 在验证了所建模型准确的基础上，预测了乡居假日场地群井抽灌系统未来7年的运行情况。数值模拟结果显示地下水温度场下降较为明显，已经无法继续满足乡居假日场地群井抽灌系统的长期运行需求。 对乡居假日场地群井抽灌系统提出了两种优化方案期望能提高场地地下水温度场，两种优化方案分别为交替抽灌井与异层抽灌。数值模拟结果显示交替抽灌井并没有显著的提高地下水水温，而异层抽灌对场地的地下水水温有较好的提升效果。
[Abstract]:At present, renewable energy sources with less pollution and low energy consumption are being actively developed in the world, and the development and application of shallow geothermal energy resources has become a relatively front and hot research topic. There are nearly 31 provinces, autonomous regions and municipalities in China. With the support of provincial project "Application and Research and Design of shallow Geothermal Resources in Tangshan City" and the cooperation of the second Geological team of Tangshan City in Hebei Province, the numerical simulation study of pumping and irrigation system of well group in Tangshan City is carried out in this paper. The thermal physical properties tests were carried out around the existing project of Fengrun District Tangshan City. The average temperature and average thermal conductivity of the strata in the studied area were obtained. At the same time, 22 monitoring wells were set up in the study area, and long-term monitoring work was carried out in 2014, recording the temperature changes of groundwater in a large number of studied areas. Combined with the stratigraphic conditions and hydrogeological conditions of the study area, a three-dimensional hydro-thermal coupling numerical model of pumping and irrigation system of well group in the study area was established. The pumping and irrigation system of village holiday group wells has been in operation since 2011. The actual monitoring data of the site in 2014 are compared with the simulation results in 2014. Comparative analysis shows that the simulation results are consistent with the actual temperature of groundwater in the studied area. Thus, the accuracy of the three-dimensional coupled water-heat numerical model is verified. On the basis of verifying the accuracy of the established model, the operation of the pumping and irrigation system of the rural holiday site group is predicted in the next 7 years. The numerical simulation results show that the temperature field of groundwater decreases obviously, and it can no longer meet the long-term operation demand of the pumping and irrigation system of the rural holiday site group. In this paper, two optimization schemes are put forward to improve the temperature field of underground water. The two optimization schemes are alternate pumping and irrigation. Numerical simulation results show that alternate pumping wells do not significantly improve the groundwater temperature, but the different layer pumping irrigation has a better effect on the ground water temperature.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P314;P641.7
本文编号：2371666
[Abstract]:At present, renewable energy sources with less pollution and low energy consumption are being actively developed in the world, and the development and application of shallow geothermal energy resources has become a relatively front and hot research topic. There are nearly 31 provinces, autonomous regions and municipalities in China. With the support of provincial project "Application and Research and Design of shallow Geothermal Resources in Tangshan City" and the cooperation of the second Geological team of Tangshan City in Hebei Province, the numerical simulation study of pumping and irrigation system of well group in Tangshan City is carried out in this paper. The thermal physical properties tests were carried out around the existing project of Fengrun District Tangshan City. The average temperature and average thermal conductivity of the strata in the studied area were obtained. At the same time, 22 monitoring wells were set up in the study area, and long-term monitoring work was carried out in 2014, recording the temperature changes of groundwater in a large number of studied areas. Combined with the stratigraphic conditions and hydrogeological conditions of the study area, a three-dimensional hydro-thermal coupling numerical model of pumping and irrigation system of well group in the study area was established. The pumping and irrigation system of village holiday group wells has been in operation since 2011. The actual monitoring data of the site in 2014 are compared with the simulation results in 2014. Comparative analysis shows that the simulation results are consistent with the actual temperature of groundwater in the studied area. Thus, the accuracy of the three-dimensional coupled water-heat numerical model is verified. On the basis of verifying the accuracy of the established model, the operation of the pumping and irrigation system of the rural holiday site group is predicted in the next 7 years. The numerical simulation results show that the temperature field of groundwater decreases obviously, and it can no longer meet the long-term operation demand of the pumping and irrigation system of the rural holiday site group. In this paper, two optimization schemes are put forward to improve the temperature field of underground water. The two optimization schemes are alternate pumping and irrigation. Numerical simulation results show that alternate pumping wells do not significantly improve the groundwater temperature, but the different layer pumping irrigation has a better effect on the ground water temperature.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P314;P641.7
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