CIESC Journal ›› 2024, Vol. 75 ›› Issue (S1): 76-84.DOI: 10.11949/0438-1157.20240666

• Fluid dynamics and transport phenomena • Previous Articles     Next Articles

Research on heat extraction performance of deep U-type borehole heat exchanger

Jian HU1(), Jinghua JIANG2, Shengjun FAN1, Jianhao LIU1, Haijiang ZOU3, Wanlong CAI2, Fenghao WANG2()   

  1. 1.Shenmu Zhangjiamao Mining Company Limited, Shaanxi Coal and Chemical Industry Group, Shenmu 719300, Shaanxi, China
    2.School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
    3.Shaanxi Coalbed Methane Development Company Limited, Xi’an 710119, Shaanxi, China
  • Received:2024-06-17 Revised:2024-08-07 Online:2024-12-17 Published:2024-12-25
  • Contact: Fenghao WANG

中深层U型地埋管换热器取热特性研究

胡俭1(), 姜静华2, 范生军1, 刘建浩1, 邹海江3, 蔡皖龙2, 王沣浩2()   

  1. 1.陕煤集团神木张家峁矿业有限公司,陕西 神木 719300
    2.西安交通大学人居环境与建筑工程学院,陕西 西安 710049
    3.陕西省煤层气开发利用有限公司,陕西 西安 710119
  • 通讯作者: 王沣浩
  • 作者简介:胡俭(1986—),男,高级工程师,402294012@qq.com
  • 基金资助:
    陕西省重点研发计划高校联合项目(2023GXLH-032)

Abstract:

Based on the open-source numerical simulation software OpenGeoSys, a 3D numerical model is established, which fully considered the size characteristics of deep U-type borehole heat exchanger (DUBHE) and the distribution of complex geological parameters. The effect of factors affecting the hourly circulating temperature of the DUBHE and the long-term heat extraction performance are analyzed in this study. The thermal performance test results show that the outlet temperature of the DUBHE drops rapidly in the initial stage of operation, and gradually stabilizes in the later stage of operation. The sensitivity analysis shows that the geothermal gradient, drilling depth of the descending and ascending wells, and the length of the horizontal well have significant effects on the performance of DUBHE. The relevant conclusion will be conducive to guiding the project design and application.

Key words: renewable energy, deep U-type borehole heat exchanger, numerical simulation, heat transfer, heat extraction performance

摘要:

基于开源数值模拟计算软件OpenGeoSys建立了充分考虑中深层U型地埋管换热器尺寸特征与复杂地质参数分布的三维数值计算模型,开展了换热器长期取热过程逐时出口水温及取热性能影响因素分析。热性能测试分析结果表明,运行初期换热器出口水温快速下降,随着取热进程不断推进换热器出口水温逐渐平稳。敏感性分析表明,地温梯度、上下行井钻井深度及水平对接井长度对中深层U型地埋管换热器取热性能影响显著。相关研究结论可为中深层U型地埋管工程设计及技术应用提供参考。

关键词: 再生能源, 中深层U型地埋管换热器, 数值模拟, 传热, 取热性能

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