Improving Solar Air Conditioning efficiency through Double-Porosity Heat Exchanger design: Numerical Insights

Improving Solar Air Conditioning efficiency through Double-Porosity Heat Exchanger design: Numerical Insights | 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 Improving Solar Air Conditioning efficiency through Double-Porosity Heat Exchanger design: Numerical Insights Hela Guesmi, Hacen Dhahri This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6858436/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 goal of this work is to provide an overview of the thermal and dynamic behaviors of a solar heat exchanger filled with two porous mediums, DPHEX, aimed at improving efficiency of solar air-conditioner. The flow within the porous region is modeled by Brinkman-Forchheimer-extended Darcy model. The mathematical model of energy transport is based on the local thermal equilibrium assumption. Simulations are achieved via a single relaxation time thermal Lattice Boltzmann Method (LBM) using two distribution functions to handle the fluid velocity and temperature. The obtained numerical results show that using two porous mediums improve the flow velocity and lead to better heat transfer and increase system’s Coefficient of Performance (COP) by up to 20% compared to conventional systems. Furthermore, the integration of solar energy reduces the compressor workload, resulting in up to 33% less refrigerant use anda20–33% reduction in CO₂ emissions, highlighting the system’s potential as a sustainable and environmentally friendly alternative to traditional cooling technologies.This dual-layered exchanger architecture offers a promising path toward next-generation, low-carbon cooling systems. Solar Air Conditioning Double porosity heat exchanger Environment effect LBM 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-6858436","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":475410751,"identity":"69d11dd9-3520-480b-93f0-cd0f40a3b939","order_by":0,"name":"Hela Guesmi","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA9klEQVRIiWNgGAWjYNACgwMMfAzMBw58YGBIAPE/EKWFjYEt8eAMiBbGGURYA9LCY3yYhxgt8hHJhz/dKLgjx8Z+xuCwbZtdHj97A2NzBR4thjfS0qRzDJ4Zs/GkFRzObUsuluw5wNh4Bp+WGTlmzDkGhxPbGJI3ALUwJ264kcD+sAGvlvzPn4Fa6tv4HxgctmyrB2lhbMSnRV4ihwHosMMJbBIpBocZ2w4T1mLA88wMpMWwTeJZwsGec8cTZ/YcbMRvS3vy4885fw7L8/MnH/7wo6w6sZ+9+SB+Ww4g8xjZwCQ+DUBbUKX/4FU8CkbBKBgFIxQAAEKBWHQIdGp7AAAAAElFTkSuQmCC","orcid":"","institution":"National School of Engineers of Monastir, Monastir University, Thermal and Energetic Systems Studies Laboratory","correspondingAuthor":true,"prefix":"","firstName":"Hela","middleName":"","lastName":"Guesmi","suffix":""},{"id":475410752,"identity":"86ca1318-64af-4f54-add9-2708f47b5a37","order_by":1,"name":"Hacen Dhahri","email":"","orcid":"","institution":"National School of Engineers of Monastir, Monastir University, Thermal and Energetic Systems Studies Laboratory","correspondingAuthor":false,"prefix":"","firstName":"Hacen","middleName":"","lastName":"Dhahri","suffix":""}],"badges":[],"createdAt":"2025-06-10 03:08:10","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6858436/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6858436/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":87166967,"identity":"7dd3c3c2-f0ce-46e2-88c1-bc6ede01baf4","added_by":"auto","created_at":"2025-07-21 06:38:35","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":967707,"visible":true,"origin":"","legend":"","description":"","filename":"SDPHEX.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6858436/v1_covered_d9b53937-27e0-4a30-a6b7-199b8659e918.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Improving Solar Air Conditioning efficiency through Double-Porosity Heat Exchanger design: Numerical Insights","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"","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":"Solar Air Conditioning, Double porosity heat exchanger, Environment effect, LBM","lastPublishedDoi":"10.21203/rs.3.rs-6858436/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6858436/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe goal of this work is to provide an overview of the thermal and dynamic behaviors of a solar heat exchanger filled with two porous mediums, DPHEX, aimed at improving efficiency of solar air-conditioner. 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