相变储能装置传热强化技术发展及展望
Development and prospect of heat transfer enhancement technologies for phase change energy storage devices
摘要：
相变储能一般是利用相变材料的熔化和凝固进行热量的储存和释放,具有储能密度高、相变温度恒定等优点,是实现节能减排的重要举措。但是目前常见的相变材料普遍存在导热系数低导致储能速率较低的问题,不利于相变储能的实际应用。本文对目前相变储能传热强化技术进行了分类,综述了研究中常见的传热强化技术,包括添加翅片、高导热纳米粒子和多孔介质等单一传热强化技术,2种单一传热强化技术耦合形成的组合传热强化技术,以及采用梯级相变材料和增强对流传热的强化技术。研究了各类技术的应用案例,分析了技术存在的优缺点。最后对传热强化技术的发展进行了总结,展望了未来技术的发展方向。
Abstract：
Phase change energy storage generally uses the melting and solidification of phase change materials to store and release heat, which has the advantages of high energy storage density and constant phase change temperature, and is an important measure to achieve energy saving and emission reduction. However, the current common phase change materials generally have low thermal conductivity, resulting in a low energy storage rate, which is not conducive to the practical application of phase change energy storage. In this paper, the current phase change energy storage heat transfer enhancement technologies are classified, and the common heat transfer enhancement technologies are reviewed, including the single heat transfer enhancement technologies, such as adding fins, high thermal conductivity nanoparticles and porous media, and the combined heat transfer enhancement technologies formed by coupling two single heat transfer enhancement technologies, as well as the stepwise phase change material and enhanced convective heat transfer enhancement technology. The application cases of various technologies are studied, and the advantages and disadvantages of the technologies are analysed. Finally, the development of heat transfer enhancement technology is summarized, and the development direction of the future technology is forecasted.
Keywords:phase change energy storage; fin; nanoparticle; porous media; enhanced heat transfer; convective heat transfer