【摘要】：目前全球范圍內(nèi)都在積極研發(fā)污染少、能耗低的可再生能源，而其中淺層地熱能資源的開發(fā)與應用就成為了比較前沿與熱門的研究課題。在我國就有將近31個省、自治區(qū)、直轄市有開發(fā)利用淺層地熱能的相關項目及研究。在省級項目《唐山市淺層地熱資源應用與研究設計》的支持下，以及河北省唐山市第二地質(zhì)大隊的大力配合下，本文開展了唐山市群井抽灌系統(tǒng)的數(shù)值模擬研究。 在研究區(qū)域唐山市豐潤區(qū)現(xiàn)有項目工程－鄉(xiāng)居假日周邊進行了熱物性試驗，測試得到研究區(qū)域地層的平均溫度與平均導熱系數(shù)。同時，研究區(qū)域設置了22口監(jiān)測井，并在2014年進行了長期監(jiān)測工作，記錄了大量研究區(qū)域地下水的溫度變化情況。再結合研究區(qū)域的地層條件與水文地質(zhì)條件，建立了該研究區(qū)域群井抽灌系統(tǒng)的三維水熱耦合數(shù)值模型。 鄉(xiāng)居假日群井抽灌系統(tǒng)從2011年開始運行，現(xiàn)將場地2014年的實際監(jiān)測數(shù)據(jù)與2014年的模擬結果進行比較。對比分析顯示模擬結果與研究區(qū)域地下水的實際溫度相吻合。從而驗證了所建三維水熱耦合數(shù)值模型的準確性。 在驗證了所建模型準確的基礎上，預測了鄉(xiāng)居假日場地群井抽灌系統(tǒng)未來7年的運行情況。數(shù)值模擬結果顯示地下水溫度場下降較為明顯，已經(jīng)無法繼續(xù)滿足鄉(xiāng)居假日場地群井抽灌系統(tǒng)的長期運行需求。 對鄉(xiāng)居假日場地群井抽灌系統(tǒng)提出了兩種優(yōu)化方案期望能提高場地地下水溫度場，兩種優(yōu)化方案分別為交替抽灌井與異層抽灌。數(shù)值模擬結果顯示交替抽灌井并沒有顯著的提高地下水水溫，而異層抽灌對場地的地下水水溫有較好的提升效果。
[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.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P314;P641.7

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