首页|西安中深层U型对接换热井取热能力及热影响半径

西安中深层U型对接换热井取热能力及热影响半径

扫码查看
原文链接
  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
中深层地热能井下换热技术是一种环保的地热能开发利用技术，U型对接换热井为重要类型之一，取热能力和热影响半径是这一技术应用推广的关键问题。文章以西安某 2 500m深、水平段长200 m的U型对接换热井为研究对象，基于实测地层温度和围岩热物性参数，通过原位测试及数值模拟技术，分析换热井的取热能力，探讨换热过程中围岩地层温度变化特征及范围。结果表明:目标换热井30a可持续取热功率达750 kW，平均换热功率为144 W/m;围岩地温衰减程度和范围随着取热功率增大而增大;换热井不同深度热影响半径不同，深部地层整体大于浅部，750 kW取热功率下取热 30a最大热影响半径超过 100 m，换热井进、出水井间存在一定程度的热干扰。
Heat extraction capacity and heat-affected radius of deep U-shaped borehole heat exchanger in Xi'an
Deep-borehole heat exchangers(DBHE)is currently recognized as the most environmentally friendly way to exploit geothermal energy.The deep U-shaped borehole heat exchanger is a new type of DBHE which is being explored.Heat extraction capacity and influence radius are the important problems in the process of popularizing this technology.Based on the measured parameters of ground temperature and thermophysical properties,the heat extraction capacity and influence radius of the 2 500 m deep U-shaped borehole heat exchanger are analyzed by the way of in-situ test and numerical simulation in Caotan area of Xi'an.The results show that the sustainable heat extraction power of the heat exchanger in 30 years is closed to 750 kW,with an average linear meter of 144 W;The attenuation degree and range of wall rock temperature increase with the increase of heat extraction power;The influence radius of the deep U-shaped borehole heat exchanger are different at different depths,and the deep stratum is larger than the shallow stratum as a whole;The influence radius of the 2 500 m deep U-shaped borehole heat exchanger with the heat extraction rates of 750 kW can greater than 100 m after work for 30 years,and there is a certain degree of thermal interference between the inlet well and outlet well of the Deep U-shaped borehole exchanger.

geothermal energydeep U-shaped borehole heat exchangerheat extraction capacityheat-affected radius

韩元红、张育平、张廷会、刘俊、薛宇泽

展开 >

自然资源部煤炭资源勘查与综合利用重点实验室,陕西 西安 710021

西安交通大学 人居环境与建筑工程学院,陕西 西安 710049

地热能 U型对接换热井 取热能力 热影响半径

陕西省自然科学基金陕西省自然科学基金陕西省重点研发计划陕西省重点研发计划陕西省重点研发计划

2020JM-7172023-JC-QN-0631S2020-YF-ZDCXL-ZDLSF-01142021ZDLSF05-122022ZDLSF07-06

2024

可再生能源
辽宁省能源研究所　中国农村能源行业协会　中国资源综合利用协会可再生能源专委会　中国生物质能技术开发中心　辽宁省太阳能学会

可再生能源

CSTPCD北大核心
影响因子：0.605
ISSN：1671-5292
年,卷(期)：2024.42(5)
  • 14