基于柱热源模型的同轴套管分段耦合模型研究

王晶晶; 郑建国; 邓军涛; 于永堂; 朱建民; 黄鑫

doi:10.19912/j.0254-0096.tynxb.2024-1224

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太阳能学报 ›› 2025, Vol. 46 ›› Issue (11) : 20-28. DOI: 10.19912/j.0254-0096.tynxb.2024-1224

基于柱热源模型的同轴套管分段耦合模型研究

王晶晶¹, 郑建国^1,2, 邓军涛², 于永堂³, 朱建民¹, 黄鑫¹

作者信息 +

STUDY ON SEGMENTED COUPLED MODEL OF COAXIAL CASING BASED ON COLUMN HEAT SOURCE MODEL

Wang Jingjing¹, Zheng Jianguo^1,2, Deng Juntao², Yu Yongtang³, Zhu Jianmin¹, Huang Xin¹

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文章历史 +

摘要

为有效描述地下埋管换热器系统的传热过程,便于地埋管换热器系统的优化设计。采用分层复合介质的方法和分段迭代计算,建立一种考虑土壤和钻孔传热过程的同轴套管换热器耦合解析模型,并基于试验及数值模拟结果验证模型的合理性。采用模型分析了初始地温分布、温度比对地埋管系统性能的影响。结果表明：忽略变温层的影响将会低估热交换器的换热能力,且对浅层地埋管换热性能的影响程度大于深层。另外,决定热交换量的不是入口流体温度高,而是入口流体温度与初始地温的差值高。

Abstract

To effectively describe the heat transfer process of underground buried pipe heat exchanger systems and facilitate the optimal design of buried pipe heat exchanger systems. A coupled analytical model of coaxial sleeve heat exchanger considering soil and borehole heat transfer processes was established using the method of layered composite medium and segmented iterative calculation. The rationality of the model was verified based on experimental and numerical simulation results. The influence of initial ground temperature distribution and temperature ratio on the performance of buried pipe systems was analyzed using a model. The results indicate that ignoring the influence of the variable temperature layer will underestimate the heat transfer capacity of the heat exchanger, and the impact on the heat transfer performance of shallow buried pipes is greater than that of deep layers. In addition, it was found that the heat exchange rate is not determined by a higher inlet fluid temperature, but by a larger difference between the inlet fluid temperature and the initial ground temperature.

导出引用

王晶晶, 郑建国, 邓军涛, 于永堂, 朱建民, 黄鑫. 基于柱热源模型的同轴套管分段耦合模型研究[J]. 太阳能学报. 2025, 46(11): 20-28 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1224

Wang Jingjing, Zheng Jianguo, Deng Juntao, Yu Yongtang, Zhu Jianmin, Huang Xin. STUDY ON SEGMENTED COUPLED MODEL OF COAXIAL CASING BASED ON COLUMN HEAT SOURCE MODEL[J]. Acta Energiae Solaris Sinica. 2025, 46(11): 20-28 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1224

中图分类号： TK529

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