摘要
为探究不同管材对盘管蓄冰性能的影响,采用CFD方法对单根蓄冰盘管的三维非稳态模型进行数值模拟,得出纳米导热复合材料、石墨烯复合塑料、钢3种管材盘管蓄冰的温度场与液相率分布。结果表明:在蓄冰过程中盘管外温度场和所结冰层均呈近似圆环状,越靠近盘管温度越低,盘管进口比出口所结冰层更厚;纳米导热复合材料、石墨烯复合塑料、钢这3种管材的蓄冰完成时间分别为8 h、7.4 h、6.9 h;管材导热系数在一定范围内增加,盘管蓄冰效果会更好,但过大的导热系数对蓄冰效果的促进作用不明显;随着蓄冰过程的进行,各管材的蓄冰速率都有所减缓。
In order to explore the influence of different coil materials on the ice storage performance,CFD method was used to simulate the three-dimensional unsteady model of a single ice storage coil.And the temperature field and liquid phase ratio distribution of the three kinds of coil material during ice storage were obtained,i.e.nano heat conduction composite material,graphene composite plastic and steel.The results show that in the process of ice storage,the temperature field outside the coil and the ice layer are approximately circular ring.The temperature is lower near the coil,and the ice layer is thicker at the inlet of the coil than that at the outlet.The ice storage completion time of the three kinds of coil material are 8 h,7.4 h and 6.9 h,respectively.The increase of the thermal conductivity of the coil material in a certain range will lead to a better ice storage effect,but excessive thermal conductivity has no obvious promoting effect on ice storage.With the development of ice storage process,the ice storage speed of each coil slows down.
作者
姜坪
张元明
吕超
刘月琴
张越
王征
Jiang Ping;Zhang Yuanming;Lv Chao;Liu Yueqin;Zhang Yue;Wang Zheng(College of Civil Engineering and Architecture,Zhejiang Sci-Tech University,Hangzhou 310018,China;Hangzhou RUNPAQ Technology Co.,Ltd.,Hangzhou 310030,China)
出处
《低温工程》
CAS
CSCD
北大核心
2020年第4期31-37,79,共8页
Cryogenics
基金
浙江省自然科学基金项目(LY18E060009)
浙江理工大学科研业务费专项(2019Q057)
浙江省低碳建筑能源环境工程技术研究中心资助项目(2011E10033)。
关键词
蓄冰
盘管
管材
导热系数
冰层厚度
ice storage
coil
coil material
thermal conductivity
ice thickness
