管翅式热泵相变储能器的数值模拟Numerical Simulation of Fin-tube Heat Pump with Phase Change Thermal Storage
朱冬生,徐婷,杨硕,叶为标,汪南,巨小平
ZHU Dong-sheng1,2,XU Ting1,YANG Shuo1,YE Wei-biao1,WANG Nan1
摘要(Abstract)：
为了研究铝翅片管对相变储能材料(PCM)传热性质的影响,通过建立模型数值模拟的方法对有翅片和无翅片的储能单元的传热性能进行了对比。研究了翅片间距(w)、铝片厚度(2v)、相变材料导热系数(kpcm)等参数对总放热时间的影响。在有翅片的情况下,储热单元凝固的时间比无翅片时减少了90%,而翅片间距和总放热时间近似呈线性关系。得出铝翅片可以大大加强相变过程传热、特别是对导热系数小于0.5W/(m.K)的PCM强化效果非常明显。
In order to study the aluminum finned tube heat transfer properties of PCM,through the model and the numerical simulation method to have fins and no finned heat transfer performance of the storage unit.Study the influence of fin spacing(w)、thickness(2v)and thermal conductivity of PCM(kpcm) on total exothermic time.Comparing with a wingless energy storage unit,the solidification time reduced to 10%.The fin spacing and the total exothermic has a linear relation.The results show that aluminum fin greatly enhance the heat transfer of the phase transition process,especially the heat transfer coefficient of the PCM lower than 0.5 W/(m·K).
关键词(KeyWords)：
相变储能;强化传热;数值模拟
phase change thermal storage;enhanced heat transfer;numerical simulation
基金项目(Foundation): 广州市科技计划资助项目(2008Z1-1061)
作者(Author):
朱冬生,徐婷,杨硕,叶为标,汪南,巨小平
ZHU Dong-sheng1,2,XU Ting1,YANG Shuo1,YE Wei-biao1,WANG Nan1
参考文献(References)：
- [1]朱冬生,钱颂文.换热器技术及进展[M].北京:中国石化出版社,2008.
- [2]钱伯章.节能减排[M].北京:科学出版社,2008.1-104.
- [3]Dincer S Dost,Xiangguo Li.Thermal energy storageapplication from an energy saving perspective[J].In-ternational Journal of Global Energy Issues,1997,9:351-364.
- [4]Son C H,Morehouse J H.An experimental investiga-tion of solid-solid phase change materials for solar ther-mal storage[J].Journal of Solar Energy Materials,1991,133:244-249.
- [5]杨硕,汪南,吴淑英,等.纳米铝粉/石蜡复合相变储能材料的性能研究[J].材料导报,2009,12 23(12):20-22.
- [6]谢望平,汪南,朱冬生,等.相变材料强化传热研究进展[J].化工进展,2008,27(2):190-195.
- [7]Wu S Y,Zhu D S,Li X F,et al.Thermal energystorage behavior of Al2O3-H2O nanofluids[J].Ther-mochimica Acta,2009,483(1-2):73-77.
- [8]Xinfang Li,Dongsheng Zhu,Nan Wang,et al.Dis-persion behavior and thermal conductivity characteris-tics of Al2O3?H2O nanofluids[J].Current AppliedPhysics.2009,9(1):131-139.
- [9]Li Xin-Fang,Zhu Dong-Sheng,Wang Xian-Ju,et al.Effect factor and function mechanism on dispersion andstability of Cu nanoparticles[J].Chemical Engineer-ing(China),2007,35(12):46-50.
- [10]王君超.平面二维河流数值模拟方法及其应用[J].中国科教创新导刊,2010,(11):93-94.
- [11]崔明荣.多孔介质中混溶驱动问题的二阶迎风差分格式[J].山东大学学报(自然科学版),2000,35(4):367-371.
- [12]郭常青,朱冬生,蒋翔,等.板式蒸发式冷凝器传热传质的数值模拟[J].华南理工大学学报(自然科学版),2009,37(3):53-57.
- [13]Long J Y,Zhu D S.Numerical and experimentalstudy on heat pump water heater with PCM for ther-mal storage[J].ENERGY AND BUILDINGS,2008,40:666-672.