利用OpenGeoSys（OGS）软件,采用双连续体介质方法并结合实际工程资料,建立中深层地埋管换热数值模型。在此基础上,研究中深层地埋管换热技术在中国北方严寒地区的换热性能及其适用性,同时对其换热影响因素及可持续性进行研究。研究结果表明：在中国北方严寒地区,中深层地埋管换热技术换热性能较好,具有良好的适用性及可持续性。通过将地埋管布置在优质地热区域,同时增大循环水流量、增加地埋管深度、选择较大内管导热系数及回填材料导热系数等方式可提高地埋管换热功率;较高的循环水进水温度、较大的内外管径比及内管导热系数则会减弱换热效果。
Abstract
Using the dual continuum medium method, a comprehensive numerical model of buried pipe heat transfer is established. On this basis, we evaluate the applicability of this technology in the severe cold region of northern China. At the same time, the influencing factors and sustainability of its heat transfer are studied. The research results show that in the severe cold region of northern China, the heat transfer performance of the mid-deep buried tube heat exchange technology is excellent, and it has good applicability and sustainability. The increase of the circulating water flow, the buried pipe depth, the thermal conductivity of inner pipes or the thermal conductivity of backfill materials can improve the heat transfer power; of the buried pipe. However, the increase of circulating water inlet temperature, inner and outer pipe diameter ratio or inner pipe thermal conductivity will reduce the heat transfer effect.
关键词
地热能 /
换热性能 /
数值模拟 /
严寒地区 /
可持续性
Key words
geothermal energy /
heat transfer performance /
numerical simulation /
cold region /
sustainability
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基金
山西省基础研究计划（面上项目）（202203021211127）; 中国博士后科学基金（2020T130390; 2019M661053）; 山东省第一地质矿产勘查院开放基金（2022DY09）
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