| 李晨晶,梅新忠,王华军,李聚刚,张枫艳,王杰,吕玮,刘艳丽.U型地埋管换热器传热性能数值模拟——以廊坊市为例[J].地质找矿论丛,2026,41(1):112-120 |
| U型地埋管换热器传热性能数值模拟——以廊坊市为例 |
| Numerical Simulation of Heat Transfer Performance of U-shaped Underground Pipe Heat Exchanger: A Case Study of Langfang Area |
| 投稿时间：2025-12-31 修订日期：2026-03-06 |
| DOI：10.6053/j.issn.1001-1412.2026.01.011 |
| 中文关键词: 浅层地热能 U型地埋管换热器 传热特性 数值模拟 廊坊市 |
| 英文关键词:shallow geothermal U-shaped buried pipe heat transfer performance numerical simulation Langfang area |
| 基金项目:河北省地矿局科技应用研究项目“中浅层地热能开发利用技术研究与示范”（13000023P00329410180C，13000024P0069B4103049）资助。 |
| 作者 | 单位 | E-mail | | 李晨晶 | 河北省地球物理勘查院(河北省浅层地热能研究中心), 河北 廊坊 065000
浅层地热能河北省工程研究中心(筹), 河北廊坊 065000 | | | 梅新忠 | 河北省地球物理勘查院(河北省浅层地热能研究中心), 河北 廊坊 065000
浅层地热能河北省工程研究中心(筹), 河北廊坊 065000 | 13581646886@126.com | | 王华军 | 河北工业大学能源与环境工程学院, 天津 300401 | | | 李聚刚 | 河北省地球物理勘查院(河北省浅层地热能研究中心), 河北 廊坊 065000
浅层地热能河北省工程研究中心(筹), 河北廊坊 065000 | | | 张枫艳 | 河北省地球物理勘查院(河北省浅层地热能研究中心), 河北 廊坊 065000
浅层地热能河北省工程研究中心(筹), 河北廊坊 065000 | | | 王杰 | 河北省地球物理勘查院(河北省浅层地热能研究中心), 河北 廊坊 065000
浅层地热能河北省工程研究中心(筹), 河北廊坊 065000 | | | 吕玮 | 河北省地球物理勘查院(河北省浅层地热能研究中心), 河北 廊坊 065000
浅层地热能河北省工程研究中心(筹), 河北廊坊 065000 | | | 刘艳丽 | 河北省地球物理勘查院(河北省浅层地热能研究中心), 河北 廊坊 065000
浅层地热能河北省工程研究中心(筹), 河北廊坊 065000 | |
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| 中文摘要: |
| 浅层地热能作为一种清洁环保的可再生能源，对于我国能源结构的转型及“双碳”目标的实现具有重要意义。目前，对于常规浅层地热能的研究主要集中于200 m以浅的深度，对于200 m以深的浅层地热能研究相对较少。本文基于廊坊市中浅层地热能开发利用示范项目，以PE-RT单U-250 m和PE-RT单U-300 m型地埋管为研究对象，开展地埋管换热器数值模拟研究。结果表明，增大循环介质流量和减小换热管材壁厚可提高地埋管换热器换热量，但是在实际系统运行时还需综合考虑换热量、热泵机组性能、循环水泵功耗及管材安全性能等多种因素。此外，基于廊坊市实际地热地质条件及用能模式，在冬（夏）季运行期间，250 m深度PE-RT单U地埋管的热影响距离分别为3.9 m和2.7 m，300 m深度PE-RT单U地埋管的热影响距离分别为4.1 m和2.8 m（温差阈值为0.2℃）。通过对250 m和300 m深度地埋管换热系统进出口水温的长期运行稳定性分析，系统的换热性能存在一定程度衰减，在实际工程应用中采用间歇运行模式有助于提高系统换热能效。该研究成果对于拓展浅层地热能的开发利用具有一定的指导意义。 |
| 英文摘要: |
| Shallow geothermal energy, as a clean and environmentally friendly renewable energy source, holds significant importance for the transformation of China’s energy structure and the achievement of its “Dual Carbon Goals”. However, current research on conventional shallow geothermal energy has mainly focused on depths below 200 meters, while research on deeper shallow geothermal energy has been relatively limited. This paper is based on the demonstration project for the development and utilization of shallow geothermal energy in the Langfang area. Numerical simulations of shallow-buried pipe heat exchangers were conducted using PE-RT single U-250 m and PE-RT single U-300 m pipes as the subjects of study. Results indicate that increasing the flow rate of the circulating medium and reducing the wall thickness of heat-exchange pipes can enhance the heat-transfer capacity of heat exchangers. However, during actual system operation, factors such as heat transfer capacity, heat pump unit performance, circulation pump power consumption, and safety performance must be comprehensively considered. Additionally, based on the actual geothermal geological conditions and energy consumption patterns in the Langfang region, during the winter and summer operating periods, the thermal influence distances for PE-RT single U-250 m are 3.9 m and 2.7 m, and for PE-RT single U-300 m are 4.1 m and 2.8 m (temperature difference threshold: 0.2 ℃). Through long-term stability analysis of inlet and outlet water temperatures, it was found that the system’s heat-exchange performance shows a certain degree of attenuation. In practical engineering applications, adopting an intermittent operation mode can help improve the energy efficiency of the system’s heat exchange. This research will provide valuable guidance for the development and utilization of shallow geothermal energy. |
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