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Enhancing the thermal response of a latent heat storage system for suppressing temperature fluctuation of dusty flue gas
Applied Energy ( IF 10.1 ) Pub Date : 2020-03-28 , DOI: 10.1016/j.apenergy.2020.114870
Song-Zhen Tang , Yan He , Ya-Ling He , Fei-Long Wang

A latent heat thermal system suitable for high dusty flue gas environment is essential to regulate gas temperature fluctuation and improve dust removal efficiency. In the current study, an integrated thermal storage-transfer structure with phase change material (PCM) and honeycomb tube bundle was proposed and thermal response of a latent heat storage system was numerically studied. Firstly, the feasibility of using honeycomb tube bundle as thermal storage unit was verified. Next, the thermal performance enhancement of the PCM side was conducted by adding different internal fins. Finally, the predictive correlation of the suppression coefficient of temperature fluctuation was established to control the flue gas temperature reasonably based on the optimal fin arrangement obtained. The results of the present study show that the latent heat storage system with honeycomb tube bundle and internal fins is effective temperature control system. Among the five proposed internal fins, case 5 (with fins) has a higher melting and solidification rate than case 0 (without fin), and the complete melting and solidification time are reduced by 19% and 46%, respectively. According to the correlation of suppression coefficient, the latent heat storage system can be designed efficiently and reasonably, so as to improve the dust removal efficiency of the low-temperature electrostatic precipitation technology.



中文翻译:

增强潜热存储系统的热响应,以抑制粉尘烟气的温度波动

适用于高粉尘烟气环境的潜热热系统对于调节气体温度波动和提高除尘效率至关重要。在当前的研究中,提出了一种具有相变材料(PCM)和蜂窝状管束的集成储热-传递结构,并对潜热系统的热响应进行了数值研究。首先,验证了使用蜂窝管束作为蓄热单元的可行性。接下来,通过添加不同的内部散热片来增强PCM侧的热性能。最后,建立了温度波动抑制系数的预测相关性,以基于获得的最佳翅片布置合理地控制烟气温度。研究结果表明,具有蜂窝状管束和内部散热片的潜热存储系统是有效的温度控制系统。在提议的五个内部散热片中,情况5(带有散热片)的熔化和固化速率高于情况0(不带有散热片)的情况,并且完全熔化和固化的时间分别减少了19%和46%。根据抑制系数的相关性,可以高效合理地设计潜热存储系统,以提高低温静电沉淀技术的除尘效率。完全熔化和凝固时间分别减少了19%和46%。根据抑制系数的相关性,可以高效合理地设计潜热存储系统,以提高低温静电沉淀技术的除尘效率。完全熔化和凝固时间分别减少了19%和46%。根据抑制系数的相关性,可以高效合理地设计潜热存储系统,以提高低温静电沉淀技术的除尘效率。

更新日期:2020-03-28
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