| 袁安冬,唐文龙,汪丽娟,王海涛.中深层地热井换热器性能模拟研究[J].安徽建筑大学学报,2022,30(): |
| 中深层地热井换热器性能模拟研究 |
| Study on Performance Simulation of Heat Exchanger in Mid-deep Geothermal Well |
| 投稿时间：2021-03-31 修订日期：2021-07-22 |
| DOI： |
| 中文关键词: Fluent 中深层地热能 换热性能 换热量 |
| 英文关键词: Fluent mid-deep geothermal energy heat transfer performance heat exchange volume |
| 基金项目:安徽省重点研究与开发计划项目(201904a07020072;202004a07020019;202004a07020049)作者：袁安冬(1995-),男,硕士生,主要研究方向为中深层地热能利用 ,唐文龙1,汪丽娟1,王海涛1 |
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| 中文摘要: |
| 通过Fluent软件结合北方邯郸地区建立中深层地热能井下同轴套管式换热器换热模型,模拟研究了岩土导热系数、内管导热系数、循环流体流量、循环流体入口温度变化对井下同轴套管式换热器换热性能的影响。结果表明：当岩土的导热系数从1 W/(m.K)增加到9 W/(m.K),换热器换热量约增长324.53%；内管导热系数从0.5 W/(m.K)增加到4.5 W/(m.K),换热器换热量约减少40.37%；循环流体流量从10 m3/h增加到50 m3/h,换热器换热量约增长103.92%；循环流体入口温度从5 ℃增加到15 ℃,换热器换热量约减少23.14%。所以在实际工程中应在岩土导热系数相对较大的地域进行中深层地热能开发,选择导热系数较小的内管以及循环流量较大的井下换热器并保持外管循环流体入口温度较低。 |
| 英文摘要: |
| The heat transfer model of the mid-deep geothermal energy downhole coaxial casing heat exchanger was established by Fluent software combined with typical areas in north China,the effects of thermal conductivity coefficient of rock and soil, thermal conductivity coefficient of inner pipe, circulating fluid flow rate and inlet temperature of circulating fluid on the heat transfer performance of downhole coaxial casing heat exchanger were simulated. The results showed that: When the thermal conductivity of rock and soil increases from 1 W/(m.K) to 9 W/(m.K), the heat transfer volume of the heat exchanger increases about 324.53%；The thermal conductivity of the inner pipe increases from 0.5 W /(m.K) to 4.5 W /(m.K), the heat transfer volume of the heat exchanger decreases about 40.37%; The circulating water flow increased from 10 m3/h to 50 m3/h, the heat transfer volume of the heat exchanger increased about 103.92%; The inlet temperature of circulating fluid increases from 5 ℃ to 15 ℃, the heat transfer volume of the heat exchanger decreases about 23.14%. Therefore, in practical engineering, middle-deep geothermal energy development should be carried out in areas with relatively large geotechnical thermal conductivity, inner pipe with small thermal conductivity and underground heat exchangers with large circulating flow should be selected, and inlet temperature of circulating fluid in outer pipes should be kept low. |
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