甘肃省平凉市中心城区土壤源浅层地温能赋存规律研究  

Study on the occurrence rule of shallow geothermal energy from soil source in Pingliang City,Gansu Province

作　　者：范斌 FAN Bin(The Second Geological and Mineral Exploration Institute of Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Lanzhou 730020,Gansu,China)

机构地区：[1]甘肃省地质矿产勘查开发局第二地质矿产勘查院,甘肃兰州730020

出　　处：《资源信息与工程》2024年第3期70-73,共4页Resource Information and Engineering

摘　　要：研究区属陇东盆地,该区域大地热流值平均值为55.78 mW/m^(2),其中平凉市一般在41.57~80.87 mW/m^(2)之间。根据大地热流值判断平凉市浅层平均温度的分布基本为西南高、东北低,而恒温层在地表以下20~25 m处,该层温度在10.6~11.2℃之间。通过恒功率加热试验研究得出:小功率加热试验热导率3.61 W/(m·℃),每延米换热量44.47 W/m;大功率加热试验热导率2.91 W/(m·℃),每延米换热量71.15 W/m。加热恒温度试验得出:在夏季制冷模拟实际工况下的每延米换热量为53.44 W/m。研究结果可作为地源热泵设计和地埋管长度计算的依据。The study area belongs to Longdong Basin.The average value of ground heat flow in this area is 55.78 mW/m^(2),among which,Pingliang City generally ranges from 41.57 to 80.87 mW/m^(2).According to the ground heat flow value,the average temperature in the shallow layer of Pingliang City is basically high in the southwest and low in the northeast,while the constant temperature layer is 20-25 m below the surface,and the temperature in this layer is between 10.6 and 11.2℃.According to the constant power heating test,the thermal conductivity of low power heating test is 3.61 W/(m·℃),and the heat transfer per meter is 44.47 W/m.High power heating test thermal conductivity is 2.91 W/(m·℃),heat exchange per meter is 71.15 W/m.The heat transfer rate per meter is 53.44 W/m under simulated summer cooling condition.The research results can serve as a basis for the design of ground source heat pumps and the calculation of buried pipe length.

关 键 词：平凉市 浅层地温能 热源特征 

分 类 号：P641[天文地球—地质矿产勘探]