流速对垂直双U 形地埋管换热器换热的影响研究.pdf

文档介绍：流速对垂直双 U 形地埋管换热器换热的影响研究

宋英峰吴学红龚毅
(郑州轻工业学院机电工程学院,郑州 450002)

摘要管内流速影响换热器换热的效果,同时也将决定水泵的动力消耗,因此,在设计地源热泵室外侧
换热器时,需要确定合理的钻孔间距;间距过大会浪费土地资源,过小又会影响换热效果。本文系统连续
运行 30 天时,模拟流速对热力半径的影响。计算结果显示, 时,热力半径达到 ,随着流速的
增大热力半径增大,在流速大于 时,热力半径增幅明显减少。
关键词地源热泵双 U 管经济流速数值模拟
THE INVESTIGATION OF FLUID VELOCITY TO THE EFFECT OF HEAT
TRANSFER OF VERTICAL DOUBLE U-TUBE HEAT EXCHANGER

Song Yingfeng Wu Xuehong Gong Yi
(School of Electromechanical Science and Engineering, Zhengzhou University of Light Industry,Zhengzhou, Henan, 450002)

Abstract The variety of flow rate has a great effect on the efficiency of heat exchanger, as well as the power
consumption of pumps. It is necessary to determine a reasonable bore distance when we design the outdoors heat
exchanger of the ground-coupled heat pump. The larger distance will cause the waste of ground source,on the
contrary, it will reduce the efficiency of heat exchanger. So, in this paper, the fluid velocity to the effect of
thermal radius is simulated when system has worked 30 days. putational results show that thermal radius
is when fluid velocity is , which increases with increasing fluid velocity. But the thermal radius
range is obviously slight when fluid velocity is more than .
Keywords Ground Source Heat Pump Double U-tube Economic flow Numerical simulation

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