流量对地埋管换热性能影响的实验研究.pdf

文档介绍：流量对地埋管换热性能影响的实验研究

张锐张旭周翔董丽娟唐凯

(同济大学暖通空调及燃气研究所,上海 201804)

摘要地埋管单位井深换热量是保证地源热泵系统长期稳定高效运行的重要参数之一,其影响因素很
多,本文主要是通过实验的方法分析流量对地埋管换热量的影响,并且将模拟值与实验值进行了比较,
误差在 10%以内。结果表明,单位井深换热量随流量的增加而增大,但是随着管内流态由“过渡状态”
变为“旺盛紊流”,换热量的增加速率逐渐缓慢。
关键词地源热泵流量单位井深换热量实验

IMPACT OF FLOW RATE ON THE HEAT EXCHANGE QUANTIFY OF
GROUND HEAT EXCHANGER ACCORDING TO EXPERIMENT

Zhang Rui Zhang Xu Zhou Xiang Dong Lijuan Tang Kai
(Institute of HVAC&GAS Engineering, Tongji University, Shanghai 201804, China)

Abstract Heat exchange quantity per unit borehole depth is one of the important parameter to ensure the ground
source heat pump long-time running. There are many influencing factor of heat exchanger quantity. This paper
mainly analyzed the flow rate effect according to experiment, pared the simulation and experimental
result, the uracy was less than 10%. The result indicated that, the lager of the flow rate, the larger of heat
exchange quantity, but the smaller of the increase rate along with the flow regime from “transition station” to
“strong turbulence”.
Keywords Ground source heat pump Flow rate Heat exchange quantity per unit borehole depth
Experiment


很多人已经通过实验或者模拟的方法对其进行了
0 绪论
研究,袁旭东等[1]通过实验分析了进水温度、循
鉴于地源热泵系统节能环保优势,国内近年环水流量、地埋管类型等对换热量的影响;刘正
来开展了许多相关研究和工程应用,但并不是所华等[2]也通过实验研究了地埋管换热器影响因
有系统都能发挥其节能高效的优势。为了保证地素,并采用模拟进行了验证;陈旭等[3]通过数值
源热泵系统能够高效节能、长期稳定