Heat and mass transfer limitations of released power for thermochemical heat storage process: Three main operation modes

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL Chemical Engineering Science Pub Date : 2024-07-02 DOI:10.1016/j.ces.2024.120452

Alexandra Grekova, Mikhail Tokarev

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Abstract

Thermochemical heat storage is promising energy saving technology. In order to make the technology competitive it is necessary to identify all possible “bottle necks” of the heat transformation process. Three key modes of the heat release are considered: maximum power, maximum heating, prolonged heat release. Possible limiting stages of heat release are analyzed. Theoretical dependences describing released power and heat transfer fluid temperature are derived and verified experimentally. The global heat transfer coefficient UA and maximum power for small heat exchanger (140 cm³) were found by different methods. Results for UA (39 ± 4 W/K, 34 ± 4 W/K and 37 ± 4 W/K) and maximum power (320 ± 20 W and 350 ± 20 W) obtained theoretically and experimentally are in good agreement. Recommendations on realization of all three modes are given. The novelty of this paper is the attempt to perform a quantitative comprehensive analysis of the constraints that different system resistances impose on the released power.

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热化学蓄热过程中释放动力的传热和传质限制：三种主要运行模式

热化学蓄热是一项前景广阔的节能技术。为了使该技术具有竞争力，有必要找出热转换过程中所有可能的 "瓶颈"。我们考虑了热量释放的三种关键模式：最大功率、最大加热和长时间热量释放。分析了可能的热释放限制阶段。得出了描述释放功率和导热液体温度的理论依赖关系，并通过实验进行了验证。通过不同的方法得出了小型热交换器（140 立方厘米）的全局传热系数 UA 和最大功率。理论和实验得出的 UA（39 ± 4 W/K、34 ± 4 W/K 和 37 ± 4 W/K）和最大功率（320 ± 20 W 和 350 ± 20 W）结果非常吻合。本文给出了实现所有三种模式的建议。本文的新颖之处在于尝试对不同系统电阻对释放功率的限制进行定量综合分析。

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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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.