摘要
蓄热技术可以有效克服供能端与用户端在时间和空间上的不匹配问题,是提高能源利用率的重要手段之一,但是当前的蓄热技术存在蓄、放热速率较低等问题。鉴于此,本文综述了过程强化技术在蓄热中的应用。首先介绍了各类蓄热技术,包括显热蓄热、潜热蓄热以及热化学蓄热,并且从蓄热密度、蓄放热速率以及技术可行性上对各类蓄热技术的优缺点进行了比较;其后,重点回顾了代表性过程强化技术在蓄热系统中的应用,包括结构优化、材料改性以及梯级蓄热;通过分析可以看出,过程强化技术可以对蓄热过程中的传热传质进行强化,极大地提高蓄热系统的蓄放热效率。最后,本文就蓄热技术发展趋势进行了展望,蓄热系统将朝着紧凑、高效的方向发展;在未来的发展中,蓄热技术与能源互联网的结合是应用研究的重点之一。
The technology of thermal energy storage can efficiently overcome the mismatch between the sides of energy supply and end-user, which is one of the important means to improve the utilization efficiency of energy. However, the current technologies of thermal energy storage are unsatisfied due to a low storage/charge rate. Considering the limitations of current technological level, an state-of-art of process intensification（PI） technologies, which are applied in the thermal energy storage, is presented in this paper. Firstly, three kinds of thermal storage systems, including sensible heat storage, latent heat storage and thermal-chemical storage, are overviewed and a comparison on various PI technologies is conducted in terms of heat storage density, heat storage/charge rate and technical feasibility for an analysis on advantages and disadvantages. Then, a review on application of typical PI technologies in the field of thermal energy storage is presented with highlighted points on structure optimization, material modification and cascade thermal storage. It is implied that the heat and mass transfer in the heat storage process can be enhanced by PI technology based on literature review and analysis, which would significantly improves the heat storage efficiency of heat storage system. Finally, the development trend of thermal storage technology is discussed. The thermal storage system is developing in a more compact and efficient pathway. In the future, the integration of thermal storage technology into energy internet could be one of the promising directions for PI application of thermal energy storage.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2016年第5期1273-1282,共10页
Chemical Industry and Engineering Progress
基金
国家高科技研究发展计划(2015AA050403)
国家自然科学基金青年项目(51506149)
关键词
相变
蓄热
传热
传质
phase change
thermal energy storage
heat transfer
mass transfer
