摘要
目的研究添加不同质量浓度乙二醇溶液对地埋管换热性能的影响.方法利用gambit和fluent软件建立一个简单垂直U型地埋管热泵机组模型,模拟在不同工况下不同乙二醇的热物性参数对应的机组性能.结果夏季制冷工况下,添加乙二醇与未添加相比冷凝器的出口温度升高,乙二醇质量浓度每升高10%,温度升高1‰左右.冬季制热工况下,添加乙二醇与未添加相比蒸发器的出口温度降低,乙二醇质量浓度每升高10%,温度降低1%左右.结论通过数值模拟,得出在夏季制冷工况下,乙二醇质量浓度变化对地埋管换热的影响不太大.冬季制热时,随着乙二醇质量浓度的升高制热量降低.并得到在制冷和制热的工况下不同质量浓度的乙二醇对应的热泵机组的出口温度随时间的变化规律及模拟出在质量浓度对应的制热量的修正系数.
This paper studies the effect of different mass concentration glycol solution on heat transfer performance of buried tube heat exchanger. A simple vertical u-shaped buried heat exchanger unit model is established by gambit and fluent software to simulate the unit heat exchange performance with different thermal physical property parameters of ethylene glycol. Under working conditions of refrigeration in summer, the outlet temperature of condenser will be increased while adding glycol to condenser, ethylene glycol mass concentration rises 10% ,temperature rises by about 1‰. Under working conditions of heating in winter, the outlet temperature of condenser will be lower while adding glycol, ethylene glycol mass concentration rises 10% mass concentration ,temperature decreases by about 1%. By numerical simulation ,under working conditions of refrigeration in summer, the effect of ethylene glycol concentration change on buried tube heat exchanger is not very huge. Under working conditions of heating in winter, the mass concentration of ethylene glycol is higher while the heating capacity is lower. And we get, under working conditions of refrigeration and heating, the condenser outlet temperature varies with time and correction factor of heating will be simulated.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2014年第3期504-509,共6页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51178074)
沈阳建筑大学基金项目(2013142)
关键词
乙二醇质量浓度
垂直U型地埋管
热泵性能
修正系数
数值模拟
ethylene glycol mass concentration
the vertical u-shaped ground tube
heat pump performance
correction factor
numerical simulation
