Thermal-fluid system integration of a LiBr absorption heat pump for advanced waste heat recovery in Coal-Fired power plants

Thermal-fluid system integration of a LiBr absorption heat pump for advanced waste heat recovery in Coal-Fired power plants | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Thermal-fluid system integration of a LiBr absorption heat pump for advanced waste heat recovery in Coal-Fired power plants Yingchao Wang, Jie Wang, Xin Li, Changxin Qi, Jia Gao, Jiading Jiang, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8252966/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract To address the issues of high thermal energy consumption in heating supply and insufficient energy cascade utilization in coal-fired units, this study proposes an integrated heat recovery system that integrates a low-temperature economizer with a lithium bromide (LiBr) absorption heat pump. A 350 MW supercritical unit is used as the case study, where a cascaded heating system is constructed using turbine extraction steam as the driving heat source, while recovering waste heat from both the pre-desulfurization flue gas and the condenser circulating water. This study presents a simulation-based investigation into an integrated system for waste heat recovery and efficiency enhancement in coal-fired power plants. The results demonstrate that the system recovers 8.026 MW of flue gas waste heat, achieves a heat pump coefficient of performance (COP) of 1.718, and reduces the heating extraction steam consumption by 32.5% compared to conventional methods. Therefore, this research offers a practical and efficient strategy. It is particularly relevant for areas with substantial heating demands, aiming at the energy-saving retrofit and improved operational flexibility of existing coal-fired power units. Absorption heat pump Coal-fired unit Waste heat recovery Performance analysis Simulation Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8252966","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":586843575,"identity":"5a659961-4b84-4716-8d70-a6002fe22703","order_by":0,"name":"Yingchao 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A 350 MW supercritical unit is used as the case study, where a cascaded heating system is constructed using turbine extraction steam as the driving heat source, while recovering waste heat from both the pre-desulfurization flue gas and the condenser circulating water. This study presents a simulation-based investigation into an integrated system for waste heat recovery and efficiency enhancement in coal-fired power plants. The results demonstrate that the system recovers 8.026 MW of flue gas waste heat, achieves a heat pump coefficient of performance (COP) of 1.718, and reduces the heating extraction steam consumption by 32.5% compared to conventional methods. Therefore, this research offers a practical and efficient strategy. 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