摘要
目前,我国对于水热型地热资源的开发利用方式以直接抽取地下热水为主,采用同轴管换热技术的工程实例较少。通过在邯郸东部平原区开展的一项试验工程,讨论了同轴管换热技术在单井中的换热效率及其影响因素,并通过试验取得的实测数据,预测不同井深、回水温度等条件下的换热效率。结果表明:在循环水量保持基本不变的情况下,回水温度的升高,影响到换热功率的降低;当循环水量增大时,换热效率也随之增大,而当注水温度增高时,换热效率反而降低;地热井井径的变化,对换热效率影响并不明显。
At present,the exploitation and utilization pattern of hydrothermal type geothermal resource is mainly from geothermal water direct pumping,less case studies using the coaxial tube heat transfer technology. Through a test project launched in the Handan eastern plain area,discussed coaxial tube heat transfer technology heat transfer efficiency and its impacting factors in single well. And from the test acquired measured data,predicted heat transfer efficiency under conditions of different well depths,return water temperatures etc.The result has shown that under the circulating water quantity basically unchanged situation,the rising of return water temperature will cut down heat transfer efficiency; when circulating water quantity increasing,heat transfer efficiency thereupon increasing. And when the water injection temperature goes up,heat transfer efficiency will lower down instead. The impact is not obvious on heat transfer efficiency from variation of geothermal well diameter.
作者
任虎俊
Ren Hujun(Hydrogeological Exploration Bureau,CNACG,Handan,Hebei 05600)
出处
《中国煤炭地质》
2018年第6期105-108,共4页
Coal Geology of China
关键词
换热效率
试验工程
模拟预测
循环水量
注水温度
井径变化
heat transfer efficiency
test project
simulated prediction
circulation water quantity
water injection temperature
variationof well diameter
