Regulation of reheating temperatures for sCO2 coal-fired power plant to improve the peak regulation depth

IF 9 1区 工程技术 Q1 ENERGY & FUELS
Haonan Zheng , Jinliang Xu , Jian Xie , Guanglin Liu
{"title":"Regulation of reheating temperatures for sCO2 coal-fired power plant to improve the peak regulation depth","authors":"Haonan Zheng ,&nbsp;Jinliang Xu ,&nbsp;Jian Xie ,&nbsp;Guanglin Liu","doi":"10.1016/j.energy.2025.135485","DOIUrl":null,"url":null,"abstract":"<div><div>Unstable renewable energies can be stabilized by the partial-load-operation (PLO) of supercritical carbon dioxide (sCO<sub>2</sub>) coal-fired power plant, under which the reheating temperature deviates from the rated value to deteriorate the efficiency and safety. Challenge exists on the varied heat absorption ratio of the reheater under PLO conditions. We break through the limitation of the reheater arranged in the convection region only for water-steam boiler, but propose a hybrid radiation-convection-reheater (RCRH) for sCO<sub>2</sub> boiler to stabilize the reheating temperature. Three methods including RCRH, flue gas recirculation (FGR) and burner angle adjustment (BAA) are compared, by establishing a partial load model. Our results show that without regulation, the reheating temperature decreases by 32 K at 20 % load, which is not acceptable. FGR and BAA mitigate the reheating temperature deviation to 23 K and 22 K respectively at 20 % load. To satisfy the criterion of 10 K temperature deviation, both FGR and BAA cover the load ratio range of (45–100) %, indicating not effectiveness of these methods. RCRH mitigates the reheating temperature deviation to (1∼2.5) K covering a wide load ratio range of (20–100) %, indicating a large peak regulation depth of 80 % rated power. The proposed RCRH ensures the sCO<sub>2</sub> power plant to operate at an ultra-low load ratio, which is beneficial to balance unstable renewable energies.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"322 ","pages":"Article 135485"},"PeriodicalIF":9.0000,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0360544225011272","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0

Abstract

Unstable renewable energies can be stabilized by the partial-load-operation (PLO) of supercritical carbon dioxide (sCO2) coal-fired power plant, under which the reheating temperature deviates from the rated value to deteriorate the efficiency and safety. Challenge exists on the varied heat absorption ratio of the reheater under PLO conditions. We break through the limitation of the reheater arranged in the convection region only for water-steam boiler, but propose a hybrid radiation-convection-reheater (RCRH) for sCO2 boiler to stabilize the reheating temperature. Three methods including RCRH, flue gas recirculation (FGR) and burner angle adjustment (BAA) are compared, by establishing a partial load model. Our results show that without regulation, the reheating temperature decreases by 32 K at 20 % load, which is not acceptable. FGR and BAA mitigate the reheating temperature deviation to 23 K and 22 K respectively at 20 % load. To satisfy the criterion of 10 K temperature deviation, both FGR and BAA cover the load ratio range of (45–100) %, indicating not effectiveness of these methods. RCRH mitigates the reheating temperature deviation to (1∼2.5) K covering a wide load ratio range of (20–100) %, indicating a large peak regulation depth of 80 % rated power. The proposed RCRH ensures the sCO2 power plant to operate at an ultra-low load ratio, which is beneficial to balance unstable renewable energies.
求助全文
约1分钟内获得全文 求助全文
来源期刊
Energy
Energy 工程技术-能源与燃料
CiteScore
15.30
自引率
14.40%
发文量
0
审稿时长
14.2 weeks
期刊介绍: Energy is a multidisciplinary, international journal that publishes research and analysis in the field of energy engineering. Our aim is to become a leading peer-reviewed platform and a trusted source of information for energy-related topics. The journal covers a range of areas including mechanical engineering, thermal sciences, and energy analysis. We are particularly interested in research on energy modelling, prediction, integrated energy systems, planning, and management. Additionally, we welcome papers on energy conservation, efficiency, biomass and bioenergy, renewable energy, electricity supply and demand, energy storage, buildings, and economic and policy issues. These topics should align with our broader multidisciplinary focus.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信