相变蓄热复合传热强化技术综述  

Research progress on composite heat transfer enhancement technology of phase change heat storage system

作　　者：赵兰[1] 王国珍 ZHAO Lan;WANG Guozhen(Nanjing Tech University Pujiang Institute,Nanjing 211122,Jiangsu,China;Industrial and Commercial Bank of China Data Center(Shanghai),Shanghai 201815,China)

机构地区：[1]南京工业大学浦江学院,江苏南京211122 [2]中国工商银行数据中心(上海),上海201815

出　　处：《储能科学与技术》2022年第11期3534-3547,共14页Energy Storage Science and Technology

摘　　要：相变材料(PCM)通过在相变过程中吸热或放热实现热能的存储与释放。相变材料在热能存储和热管理领域凭借其相变区间温度稳定、储能密度大受到了广泛认可。然而,相变材料普遍存在热导率低的问题,需要结合传热强化技术进行改善。在采用某一种强化技术的基础上,两种或多种传热强化技术相组合的“复合强化技术”成为目前传热强化与相变蓄热性能改善的研究热点。本文通过对相关文献的分析,综述了目前复合传热强化技术的研究进展,包括以翅片为基础,分别结合热管、纳米颗粒、多孔材料和梯级蓄热,以及多孔材料结合热管、纳米材料和梯级蓄热等多种复合方式。分析表明:通过将热管与翅片或多孔材料混合使用,可以达到传热强化最佳效果;纳米颗粒与翅片或多孔材料的混合使用比同等条件下单独使用纳米颗粒更有效;采用梯级蓄热与翅片或多孔材料相结合相较于单独采用梯级蓄热具有更快的蓄/放热速率和更加均匀的换热流体出口温度。建议对其他可能的复合传热增强技术进行深入研究,并通过实验验证、优化蓄热系统的结构设计和具体参数探讨对蓄热性能的影响。Phase change materials(PCM)can realize energy storage through absorbing and releasing latent heat during phase change processes.PCM is extensively known in thermal energy storage and management because of its stable phase change temperature and high energy storage density.Nevertheless,it usually suffers from low thermal conductivity,which needs to be aggregated with heat transfer improvement technologies.Based on adopting only one particular improvement technology,the“composite heat transfer enhancement technology,”which combines more than one heat transfer enhancement technology,has become a research hotspot of heat transfer enhancement and phase change heat-storage performance improvement.The major research in composite heat transfer technology is summarized in this research,covering studies based on fins or porous material,heat pipe joined independently,nanomaterials,and cascade heat storage.It was discovered that the best results were attained by combining heat pipes with fins or porous material.Under the same conditions,combining nanoparticles with fins or porous material is more efficient than utilizing nanomaterials alone.Compared with single cascade phase change,cascade PCM combined with fins or foam metal has faster heat storage and release rate and a more uniform fluid outlet temperature.Further studies are proposed to explore more composite improvement techniques.The influence of structural design or detail parameters needs additional experimental confirmation and enhancement,which can optimize the performance of PCM-based thermal storage systems.

关 键 词：相变蓄热 复合传热强化 翅片 纳米材料 热管 多孔材料 

分 类 号：TK02[动力工程及工程热物理]