Heat Transfer and Lifetime Estimation of High-Power Light Emitting Diodes (HPLED) Using Drop Shape Pin Fin Heat Sink Under Natural Convection

Heat Transfer and Lifetime Estimation of High-Power Light Emitting Diodes (HPLED) Using Drop Shape Pin Fin Heat Sink Under Natural Convection | 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 Heat Transfer and Lifetime Estimation of High-Power Light Emitting Diodes (HPLED) Using Drop Shape Pin Fin Heat Sink Under Natural Convection Ram Zampat Deshmukh, V. N. Raibhole This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4816776/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 22 Mar, 2025 Read the published version in Journal of the Brazilian Society of Mechanical Sciences and Engineering → Version 1 posted 4 You are reading this latest preprint version Abstract High-Power Light Emitting Diodes (HPLEDs) are a leading example of modern lighting technology and are praised for being more efficient than traditional light source’s. This study explores the complex relationship between HPLED service life, junction temperature ( T j ), and heat dissipation through drop-shaped pin fins type heat sink attached to HPLED. Four different power inputs 50, 100, 150, and 200W were analysed using three different vertical pin fin spacings ( S v = 25, 50, and 75 mm). A data acquisition system was created to measure temperature, current, LED light intensity ( Lux ), and voltage values using sensors. These values were then used as the best possible reference values for a well-known Arrhenius equation model to predict the lifetime of the device. The results shows, as power input levels rise, T j also increases, which reduces the life of HPLEDs. There is a distinct inverse relationship between device lifetime and T j that exhibits a nonlinear exponential decay pattern. For 200 and 50 W power input, respectively, the maximum junction temperature of the HPLED attaching drop-shaped pin fin heat sink was found to be 134.78°C and the minimum T j was found to be 60.13°C. The drop-shaped fin pin heat sink with a 75 mm fin spacing was found to have a maximum heat transfer coefficient of 9.81 W/m 2 K. With a 200 W power dissipation and a junction temperature ( T j ) of 134.78°C, the HPLED had a short expected operational life of 1780.2 hours. On the other hand, a projected lifetime of 3996.30 hours is anticipated at a higher temperature of T j =112.18°C. High power Light-emitting diode (HPLED) Junction temperature Heat sink Thermal management Arrhenius equation Service life of HPLED Full Text Cite Share Download PDF Status: Published Journal Publication published 22 Mar, 2025 Read the published version in Journal of the Brazilian Society of Mechanical Sciences and Engineering → Version 1 posted Reviewers agreed at journal 06 Aug, 2024 Reviewers invited by journal 02 Aug, 2024 Editor assigned by journal 31 Jul, 2024 First submitted to journal 28 Jul, 2024 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. 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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-4816776","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":335203270,"identity":"435070d0-2d6a-4b9c-83da-88b0292e6e7d","order_by":0,"name":"Ram Zampat Deshmukh","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAABEUlEQVRIiWNgGAWjYDCCAwxsQDIhAcJjk2DgB9EJBaRokWwA8Q2I18LAYHAAxMCjhe94+7NHN9vS8szbT6dJ/CizkDc+vzrxwwMDBnl+sQNYtUieOWNunNuWUyxzJnebZM85CcNtN95ulgA6zHDm7ASsWgxu5LBJ57ZVJM5gyN12g7dNgnHbjbMbQFoSDG7j0HL/+TOIFv63227+bZOw3zzj7OYfeLXcYDADaslJnCGRu+020JbEDfy92/DaInkmx0w651waUMvb7b9lzkkkz7jBu80iwUACp1/4jh9/Jp1Tlgx0WO5mwzdldbb9/Wc33/xRYSPPL41dCxYgAVYpQaxyEOA/QIrqUTAKRsEoGAEAAKPqZ3cIpCE7AAAAAElFTkSuQmCC","orcid":"","institution":"G H Raisoni Institute of Engineering and Management","correspondingAuthor":true,"prefix":"","firstName":"Ram","middleName":"Zampat","lastName":"Deshmukh","suffix":""},{"id":335203271,"identity":"502683e2-c29f-4ffa-a9ab-cd5bb8a02887","order_by":1,"name":"V. 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This study explores the complex relationship between HPLED service life, junction temperature (\u003cem\u003eT\u003c/em\u003e\u003csub\u003e\u003cem\u003ej\u003c/em\u003e\u003c/sub\u003e), and heat dissipation through drop-shaped pin fins type heat sink attached to HPLED. Four different power inputs 50, 100, 150, and 200W were analysed using three different vertical pin fin spacings (\u003cem\u003eS\u003c/em\u003e\u003csub\u003e\u003cem\u003ev\u003c/em\u003e\u003c/sub\u003e = 25, 50, and 75 mm). A data acquisition system was created to measure temperature, current, LED light intensity (\u003cem\u003eLux\u003c/em\u003e), and voltage values using sensors. These values were then used as the best possible reference values for a well-known Arrhenius equation model to predict the lifetime of the device. The results shows, as power input levels rise, \u003cem\u003eT\u003c/em\u003e\u003csub\u003e\u003cem\u003ej\u003c/em\u003e\u003c/sub\u003e also increases, which reduces the life of HPLEDs. There is a distinct inverse relationship between device lifetime and \u003cem\u003eT\u003c/em\u003e\u003csub\u003e\u003cem\u003ej\u003c/em\u003e\u003c/sub\u003e that exhibits a nonlinear exponential decay pattern. For 200 and 50 W power input, respectively, the maximum junction temperature of the HPLED attaching drop-shaped pin fin heat sink was found to be 134.78\u0026deg;C and the minimum \u003cem\u003eT\u003c/em\u003e\u003csub\u003e\u003cem\u003ej\u003c/em\u003e\u003c/sub\u003e was found to be 60.13\u0026deg;C. The drop-shaped fin pin heat sink with a 75 mm fin spacing was found to have a maximum heat transfer coefficient of 9.81 W/m\u003csup\u003e2\u003c/sup\u003eK. With a 200 W power dissipation and a junction temperature (\u003cem\u003eT\u003c/em\u003e\u003csub\u003e\u003cem\u003ej\u003c/em\u003e\u003c/sub\u003e) of 134.78\u0026deg;C, the HPLED had a short expected operational life of 1780.2 hours. 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