Evaluation of Energy-Efficient Building Envelopes with Thermal Insulation for Iraqi Climatology

Evaluation of Energy-Efficient Building Envelopes with Thermal Insulation for Iraqi Climatology | 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 Evaluation of Energy-Efficient Building Envelopes with Thermal Insulation for Iraqi Climatology Mahmoud Fadhel Idan This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7810125/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 The application of thermal insulation significantly reduces construction costs, enhances building performance, and improves occupant comfort. This study examines strategies for cooling buildings under Iraqi climatic conditions while minimizing electricity consumption. The thermal performance of building envelopes was assessed by analyzing insulation placement (external, internal, and central) and wall orientation. The findings indicate that polystyrene and mineral wool substantially reduce heat transfer and cooling loads, while wall orientation and moisture content critically influence efficiency. Multi-layer walls with insulation positioned at the core demonstrated superior thermal resistance, underscoring the importance of material selection and optimized wall configuration for hot climates. Energy measurements conducted in a dedicated test chamber, validated against theoretical calculations, showed that thermal insulation reduces total heat transfer by up to 50%, with actual-to-predicted energy consumption ratios ranging from 73% to 78%. Analysis of U-values for three-, four-, and five-layer walls revealed that a three-layer wall with central insulation offers the most efficient balance between energy performance and cost. The results provide practical design guidance for sustainable, climate-adapted building envelopes that optimize thermal performance, structural integrity, and economic feasibility. Mechanical Engineering Thermal insulation electrical energy building materials thermal conductivity coefficient 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-7810125","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":526668755,"identity":"2397946f-307b-4785-be3c-13014f950fc2","order_by":0,"name":"Mahmoud Fadhel 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This study examines strategies for cooling buildings under Iraqi climatic conditions while minimizing electricity consumption. The thermal performance of building envelopes was assessed by analyzing insulation placement (external, internal, and central) and wall orientation. The findings indicate that polystyrene and mineral wool substantially reduce heat transfer and cooling loads, while wall orientation and moisture content critically influence efficiency. Multi-layer walls with insulation positioned at the core demonstrated superior thermal resistance, underscoring the importance of material selection and optimized wall configuration for hot climates. Energy measurements conducted in a dedicated test chamber, validated against theoretical calculations, showed that thermal insulation reduces total heat transfer by up to 50%, with actual-to-predicted energy consumption ratios ranging from 73% to 78%. Analysis of U-values for three-, four-, and five-layer walls revealed that a three-layer wall with central insulation offers the most efficient balance between energy performance and cost. 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