相变微胶囊悬浮液在热输运中应用的研究进展

Research progress of application of microencapsulated phase change slurry (MEPCS) in heat transport

相变微胶囊悬浮液是将相变微胶囊分散在基液中形成的两相流体,具有载热密度大、传热温差小等优点,在热输运中具有独特优势。本文综述了影响相变微胶囊悬浮液热输运的关键影响因素:稳定性、流动阻力特性及热输运特性。从静止稳定性及循环稳定性两方面分析了相变微胶囊悬浮液稳定性存在的问题并提出了解决方法。从黏度、压降两方面阐述了相变微胶囊悬浮液的流动阻力特性。结合阻力特性及热输运能力,分析了相变微胶囊悬浮液的热输运特性。最后介绍了相变微胶囊悬浮液在暖通空调、太阳能热利用、电力电子与动力设备散热等方面的应用。

Microencapsulated phase change slurry(MEPCS)is a kind of two-phase fluid,which has the advantages of high heat transfer density and small temperature difference.In this paper,the key factors that affect the heat transport of MEPCS were reviewed.The stability problems and the solutions were analyzed in terms of static stability and cyclic stability.The flow resistance characteristics of MEPCS were discussed in terms of viscosity and pressure drop.Combined with the characteristics of resistance and heat transport capacity,the heat transport characteristics of MEPCS were analyzed.Finally,the applications of MEPCS in heating ventilating&air conditioning,solar energy utilization,electronics and power equipment cooling were introduced.