地埋管换热场地温度羽迁移分析  

Analysis of Temperature Plume Transfer of Ground Heat Exchange Site Based on Groundwater Seepage

作　　者：葛雁 尚永升 孙葛 黄烜 杨珍 GE Yan;SHANG Yongsheng;SUN Ge;HUANG Xuan;YANG Zhen(Ecological Environment Geo-Service Center of Henan Geological Bureau,Zhengzhou 450053,China;Henan Engineering Research Center of Deep Exploration,Zhengzhou 450053,China)

机构地区：[1]河南省地质局生态环境地质服务中心,郑州450053 [2]河南省深部探矿工程技术研究中心,郑州450053

出　　处：《河南科学》2024年第11期1653-1661,共9页Henan Science

基　　金：2020年度河南省自然资源科研项目资助(豫自然资函[2020]542-1,豫自然资函[2021]157-3);郑州市多要素城市地质调查2020年第二批项目资助(郑财招标采购-2020-439)。

摘　　要：地热能作为一种可再生的清洁能源,对推进我国能源发展、实现国家“双碳”目标将发挥重要作用.目前浅层地热能的开发利用主要通过热泵技术来实现,为分析不同方向渗流的地下水对地埋管换热场地地温场的影响,分别采用现场监测和数值模拟进行分析.结果表明:(1)制冷和供暖期内,平行于地下水流向岩土体温度影响5 m左右,其中2.5 m范围内变化明显;垂直于地下水流向温度影响3 m左右,其中2 m以内变化明显.(2)地源热泵运行20年后平行于地下水流向温度羽迁移距离为84.37~142.15 m,含水层颗粒愈粗地下水渗流愈强,迁移距离愈远;垂直于地下水流向温度羽迁移距离为38.14~39.77 m,由上至下基本呈递减趋势;(3)预测20年后地温升高0.55~2℃.说明地源热泵运行时,在地下水渗流驱动下温度羽向下游和四周迁移,减缓或阻止热量累积,换热场地未形成明显的热堆积,预测其运行对温度场影响较小.As a renewable and clean energy source,geothermal energy will play an important role in promoting China’s energy development and achieving its“double carbon target.”Currently,the exploitation and utilization of shallow geothermal energy primarily rely on heat pump technology.To analyze the influence of groundwater seepage in various directions,both monitoring and numerical simulations were employed.The monitoring results revealed that:During the cooling and heating periods,the temperature influence range of rock and soil extends 5 meters parallel to the groundwater flow direction,with noticeable variation occurring within 2.5 meters.Perpendicular to the groundwater flow direction,the temperature of the rock and soil increases by approximately 3 meters,with significant changes observed within 2 meters.After 20 years of operation,the migration distance of the temperature plume parallel to the groundwater flow ranges from 84.37 to 142.15 meters.Thicker aquifer particles enhance groundwater seepage,resulting in greater migration distances.The migration distance of the temperature plume perpendicular to the groundwater flow ranges from 38.14 to 39.77 meters,exhibiting a decreasing trend from top to bottom.It is predicted that ground temperatures will increase by 0.55 to 2 degrees Celsius after 20 years.While the operation of the ground source heat pump affects the temperature field,groundwater seepage drives the temperature plume downstream,thereby slowing or preventing heat accumulation.Consequently,no significant heat accumulation is observed at the heat exchange site,indicating minimal impact on the temperature field.

关 键 词：地下水渗流 地埋管 换热系统 地温场 地热能 温度羽迁移 

分 类 号：P566[天文地球—构造地质学]