Numerical study on Finned Latent Heat Storage for Tri-generation System

Guangya Zhu, T. Chow
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Abstract

Tri-generation system combines the supply of electric power, heating and cooling energy into one single system. Compared to the separated energy generation systems, the advantages lie in its higher efficiency, reliability and flexibility, as well as the reduced pollutant emissions. Yet the mismatch in system electricity and thermal demands often downgrades its effectiveness and economic merits. At this end, the adoption of thermal energy storage can be a practical means of improvement. Among the various choices, the finned latent heat storage using phase change material is distinct advantage owing to its high energy density. On the other hand, the finned latent heat storage design requires a detailed analysis of the heat transfer process. In this paper, our numerical model is introduced for use in simulating the associated complex heat transfer processes. The accuracy of the numerical model has been verified making use of the published experimental data available from the literature. Furthermore, our follow-up parametric study shows that the increase of fin thickness will improve the heat transfer performance for a given design configuration and the better heat transfer can be achieved with the reduction in fin length and fin spacing as well.
三电系统翅片式潜热蓄热的数值研究
三联发电系统是将电力、加热和冷却的能量结合到一个单一的系统中。与分离式发电系统相比,其优点在于效率、可靠性和灵活性更高,同时减少了污染物的排放。然而,系统电力和热需求的不匹配往往会降低其有效性和经济价值。在这方面,采用热能储存可以是一种切实可行的改进手段。在多种选择中,采用相变材料的翅片潜热因其高能量密度而具有明显的优势。另一方面,翅片式潜热蓄热设计需要对传热过程进行详细分析。本文介绍了用于模拟相关复杂传热过程的数值模型。利用文献中已发表的实验数据,验证了数值模型的准确性。此外,我们的后续参数研究表明,在给定的设计配置下,增加翅片厚度可以改善传热性能,并且减小翅片长度和翅片间距也可以达到更好的传热效果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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