技术中心

【摘要】 以地源热泵地下U型埋管四钻孔换热器为研究对象,利用有限元计算方法,编制程序,模拟分析了系统运行时间及钻孔顺序排列和交叉排列时钻孔间距和布置形式对土壤温度场的影响。结果表明:随着运行时间的增长,热干扰现象越强烈,热干扰主要发生在钻孔之间,在两钻孔中间影响最大;从土壤能源利用均衡性角度来讲钻孔交叉排列的形式优于顺序排列的形式。 【Abstract】 Taking four U-tubes ground heat exchanger of Ground-source heat pump as the research object,the article simulated and analyzed the influences of the system running time,drilling spacing and arrangement by ordered or crossed on the soil temperature field based on the finite element method.The results show that the thermal interference becomes more intense with the growth of running time.Thermal interference mainly occurres between boreholes,and thermal interference is greatest at the middle of the two boreholes.Besides,cross-drilling arrangement is superior to order-drilling arrangement based on the balance of soil energy use. 【关键词】 U型埋管四钻孔换热器; 顺序排列和交叉排列; 热干扰; 土壤温度场 【Key words】 Four U-tubes ground heat exchanger; Arrangement by ordered or crossed; Thermal interference; Soil temperature field