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Title: Recent Progress on Thermal Energy Storage for Coal-Fired Power Plant
题目：适用于燃煤电厂的储热技术进展
Authors: WANG Wei, ZHANG Jianyuan, GU Yi, LUO Qing, ZHOU Guiqing, LI Ang， LU Guozhong, MA Tingshan, ZHAO Yuanzhu,CHANG Yiming, XUE Zhaonan
作者：王伟，张建元，谷毅，雒青，周桂平，厉䀚，路国忠，马汀山，赵苑竹，唱一鸣，薛朝囡
单位：西安热工研究院有限公司；国网辽宁省电力有限公司；国电电力大连庄河发电有限责任公司
Journal of Thermal Science, 2024, 33(6): 2138-2150.
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摘要
Abstract: A tandem blade configuration is a significant flow control method that delays the onset of flow separation. This study numerically investigates the effects of diffusion factor and percentage pitch on the flow structure of tandem blades. Diffusion factors vary from 0.328 to 0.484. Percentage pitches change from 0.80 to 0.92. Results show that the loss coefficient increases with diffusion factor and decreases with percentage pitch. There is a hub-corner stall of the forward blade in all cases. Gap flow determines the rear blade corner separation. Varying the percentage pitch and diffusion factor changes the momentum distribution of the gap flow. Corner separation of the rear blade is inhibited as low-momentum gap fluids are involved in the passage vortex along with the hub-corner stall of the forward blade. Increasing diffusion factor causes a change in incidence at the leading edge of the rear blade, resulting in a variation at the corner separation of the rear blade. A tandem blade is compared with the reference outlet vane. The performance of the tandem blade is superior to that of the reference outlet vane in all incidences, with a 26.35% reduction in the loss coefficient and a 7.89% enhancement in the pressurization at the designed incidence. Tandem blades stall at positive incidence because of the hub-corner stall of the forward blade. The intensity of the gap flow increases with incidence, preventing corner separation of the rear blade at positive incidences.
摘要：随着各国提出碳中和目标，能源结构的清洁转型已成为国际上的热点和潮流。可再生能源发电将占主要比例，但这也导致了电力供应不稳定的问题。目前，大规模储能技术还不成熟。提高燃煤发电厂的灵活性以抑制可再生能源发电的不稳定性是一条可行的途径。热能储存是提高燃煤电厂灵活性的可行技术。本文综述了基于储热技术的燃煤电厂柔性改造研究，主要包括基于热水罐的中低温储热和基于熔盐的高温储热。总结了目前的技术难点，并对未来的发展前景进行了展望。热能储存系统和燃煤发电系统的结合是基础，倾斜温度层的控制和熔盐的选择与开发是关键问题。作者希望本文的研究能为燃煤电厂的柔性改造研究提供参考，也希望能促进蓄热基础在具体燃煤电厂改造项目中的应用。
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引用格式
WANG Wei, ZHANG Jianyuan, GU Yi, LUO Qing, ZHOU Guiqing, LI Ang， LU Guozhong, MA Tingshan, ZHAO Yuanzhu,CHANG Yiming, XUE Zhaonan, Recent Progress on Thermal Energy Storage for Coal-Fired Power Plant, Journal of Thermal Science, 2024, 33(6): 2138-2150.
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