Dynamic energy and FEM-based acoustic analysis of fixed flat horizontal window overhangs

Dynamic energy and FEM-based acoustic analysis of fixed flat horizontal window overhangs | 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 Dynamic energy and FEM-based acoustic analysis of fixed flat horizontal window overhangs Laurentius Kevin Hendinata, Nur Abdillah Siddiq, Sentagi Sesotya Utami, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7151295/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 Solar shading devices, such as façade overhangs, offer dual benefits in reducing building energy demand and modulating acoustic transmission, yet their performance is contingent on design specificity and climatic context. This study evaluates the integrated thermal and acoustic effects of fixed horizontal overhangs through dynamic energy simulations and finite element modeling (FEM) in tropical (Indonesia) and temperate/continental climates (China). Results demonstrate that increasing overhang depth reduces annual energy consumption by up to 13.27% (14.23% HVAC-specific reduction at 140 cm depth), with diminishing returns beyond 80–100 cm projections. Daylighting remains above 300 lux, adhering to EN 12464-1 standards. Acoustically, overhangs attenuate low-frequency noise (up to + 12 dB IL at 100 Hz) but amplify mid-frequency transmission (e.g., − 3 dB IL at 315 Hz) due to diffraction effects. A balanced approach is necessary to ensure energy savings, adequate daylight, and effective noise control. Civil Engineering overhangs façade design solar shading energy consumption insertion loss Full Text Additional Declarations The authors declare no competing interests. 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-7151295","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":487034305,"identity":"ee671542-b849-4ca6-8539-91746a0349f2","order_by":0,"name":"Laurentius Kevin Hendinata","email":"","orcid":"","institution":"Aix Marseille Université","correspondingAuthor":false,"prefix":"","firstName":"Laurentius","middleName":"Kevin","lastName":"Hendinata","suffix":""},{"id":487034306,"identity":"9bf7c091-bc52-452d-bd84-d9c95aec28e6","order_by":1,"name":"Nur Abdillah Siddiq","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAvElEQVRIiWNgGAWjYBADORiDh+EAkVqMSdeS2ABnEtJiLpH7gOEHQ136hvOrExh+1DDI8BHSYjkj3YCxh+Fw7oYbbzcw9hxj4JEkpMXgRhrY/UAtZzcw8DYw8BgQo4XxD9BhBkAtjH+J1cLMw8CcYHC+dwMzcbacecZwWMbgsOHMG7wbDssckyDCL8fTGB++qaiT5zt/duPDNzU29gRDDAQOMBgASYkEUIxIEKEeDviJMX0UjIJRMApGJAAAh7E/i966QbAAAAAASUVORK5CYII=","orcid":"","institution":"Universitas Gadjah Mada","correspondingAuthor":true,"prefix":"","firstName":"Nur","middleName":"Abdillah","lastName":"Siddiq","suffix":""},{"id":487034307,"identity":"44e1f380-0e0a-4fc5-bfc9-40d732498e1d","order_by":2,"name":"Sentagi Sesotya Utami","email":"","orcid":"","institution":"Universitas Gadjah Mada","correspondingAuthor":false,"prefix":"","firstName":"Sentagi","middleName":"Sesotya","lastName":"Utami","suffix":""},{"id":487034308,"identity":"50224875-14e1-48e4-8d75-9df102d77613","order_by":3,"name":"Jun Cai","email":"","orcid":"","institution":"Hezhou University","correspondingAuthor":false,"prefix":"","firstName":"Jun","middleName":"","lastName":"Cai","suffix":""}],"badges":[],"createdAt":"2025-07-17 17:19:16","currentVersionCode":1,"declarations":{"humanSubjects":false,"vertebrateSubjects":false,"conflictsOfInterestStatement":false,"humanSubjectEthicalGuidelines":false,"humanSubjectConsent":false,"humanSubjectClinicalTrial":false,"humanSubjectCaseReport":false,"vertebrateSubjectEthicalGuidelines":false},"doi":"10.21203/rs.3.rs-7151295/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-7151295/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":87466992,"identity":"f684e541-3465-43ab-bed6-083c7b0e2c05","added_by":"auto","created_at":"2025-07-24 07:39:17","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1524144,"visible":true,"origin":"","legend":"","description":"","filename":"PaperOverhangs5.pdf","url":"https://assets-eu.researchsquare.com/files/rs-7151295/v1_covered_f889f820-8fa1-454e-8587-348b9717169d.pdf"}],"financialInterests":"The authors declare no competing interests.","formattedTitle":"\u003cp\u003eDynamic energy and FEM-based acoustic analysis of fixed flat horizontal window overhangs\u003c/p\u003e","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"Gadjah Mada University","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"overhangs, façade design, solar shading, energy consumption, insertion loss","lastPublishedDoi":"10.21203/rs.3.rs-7151295/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7151295/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eSolar shading devices, such as fa\u0026ccedil;ade overhangs, offer dual benefits in reducing building energy demand and modulating acoustic transmission, yet their performance is contingent on design specificity and climatic context. This study evaluates the integrated thermal and acoustic effects of fixed horizontal overhangs through dynamic energy simulations and finite element modeling (FEM) in tropical (Indonesia) and temperate/continental climates (China). Results demonstrate that increasing overhang depth reduces annual energy consumption by up to 13.27% (14.23% HVAC-specific reduction at 140 cm depth), with diminishing returns beyond 80\u0026ndash;100 cm projections. Daylighting remains above 300 lux, adhering to EN 12464-1 standards. Acoustically, overhangs attenuate low-frequency noise (up to +\u0026thinsp;12 dB IL at 100 Hz) but amplify mid-frequency transmission (e.g., \u0026minus;\u0026thinsp;3 dB IL at 315 Hz) due to diffraction effects. 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