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A New Hybrid Cfd Approach To Study the Impact of Forced Convection on Radiant Cooled Wall With Baseboard Diffuser Including Various Vane Angles

dc.authorscopusid 59567417000
dc.authorscopusid 58096915400
dc.authorscopusid 57207246960
dc.authorscopusid 56800992900
dc.authorscopusid 55682489100
dc.authorscopusid 24479329000
dc.contributor.author Caliskan Temiz, M.
dc.contributor.author Bacak, A.
dc.contributor.author Camci, M.
dc.contributor.author Karakoyun, Y.
dc.contributor.author Acikgoz, O.
dc.contributor.author Dalkilic, A.S.
dc.date.accessioned 2025-05-10T16:56:04Z
dc.date.available 2025-05-10T16:56:04Z
dc.date.issued 2025
dc.department T.C. Van Yüzüncü Yıl Üniversitesi en_US
dc.department-temp Caliskan Temiz M., Department of Mechanical Engineering, Mechanical Engineering Faculty, Yildiz Technical University (YTU), Istanbul, 34349, Turkey; Bacak A., ASELSAN A.S, Gölbaşı Yerleşkesi, Gölbaşı, Ankara, 06830, Turkey; Camci M., Department of Mechanical Engineering, Engineering Faculty, Siirt University, Siirt, 56100, Turkey, Department of Mechanical Engineering, Engineering Faculty, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, 10140, Thailand; Karakoyun Y., Department of Mechanical Engineering, Engineering Faculty, Van Yuzuncu Yil University (YYU), Van, 65080, Turkey; Acikgoz O., Department of Mechanical Engineering, Mechanical Engineering Faculty, Yildiz Technical University (YTU), Istanbul, 34349, Turkey; Dalkilic A.S., Department of Mechanical Engineering, Mechanical Engineering Faculty, Yildiz Technical University (YTU), Istanbul, 34349, Turkey en_US
dc.description.abstract The current work examines the effect of forced convection on thermal comfort in a space, including radiant wall cooling and an innovative floor-level diffuser system. It examines the impact of various vane angles on thermal comfort in room air conditioning at 15°, 30°, 45°, 60°, and 75°, and employs experimental data to confirm a hybrid 3D computational fluid dynamics (CFD) model. A new floor-level diffuser system delivers air at temperatures between 18 °C and 22 °C, with supply air velocities of 5 m/s and 10 m/s measured at the exit side of diffuser while the supply water temperature is kept constant at 14 °C. In the hybrid 3D solution, experimentally derived convective heat transfer coefficients (CHTCs) for forced airflow are utilized. This is accomplished by merging a k-ω model with a hydronic radiant panel system that incorporates forced convection. The analysis examines temperature and velocity distributions, CHTCs on the radiant-cooled wall, and the PMV-PPD components. Results indicate that at a supply air velocity of 5 m/s, thermal comfort parameters do not satisfy PMV and PPD indices, except in proximity to the diffuser. Nevertheless, elevating the supply air velocity to 10 m/s ensures thermal comfort across the space, with the exception of regions next to the cooled wall surfaces. The examination of several vane angles indicated that a 45° angle yields the most advantageous thermal comfort conditions, irrespective of air velocity. The CHTC adjacent to the radiant wall is roughly 6 W/m2K at a velocity of 5 m/s and rises to 8 W/m2K at 10 m/s. The temperature disparity between the head and ankle regions at 5 m/s adheres to the 3 °C tolerance established by international standards. The study determines that a 45° vane angle ensures best thermal comfort, and the devised numerical method yields significant insights for the construction of analogous indoor settings. © 2025 Elsevier Masson SAS en_US
dc.description.sponsorship Yildiz Teknik Üniversitesi; Yancheng Teachers University, YTU, (FCD-2022-5092); Yancheng Teachers University, YTU en_US
dc.identifier.doi 10.1016/j.ijthermalsci.2025.109804
dc.identifier.issn 1290-0729
dc.identifier.scopus 2-s2.0-85218412267
dc.identifier.scopusquality Q1
dc.identifier.uri https://doi.org/10.1016/j.ijthermalsci.2025.109804
dc.identifier.uri https://hdl.handle.net/20.500.14720/3539
dc.identifier.volume 213 en_US
dc.identifier.wosquality Q1
dc.language.iso en en_US
dc.publisher Elsevier Masson s.r.l. en_US
dc.relation.ispartof International Journal of Thermal Sciences en_US
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı en_US
dc.rights info:eu-repo/semantics/closedAccess en_US
dc.subject Baseboard Diffuser en_US
dc.subject Cfd en_US
dc.subject Forced Convection en_US
dc.subject Radiant Cooling en_US
dc.subject Thermal Comfort en_US
dc.title A New Hybrid Cfd Approach To Study the Impact of Forced Convection on Radiant Cooled Wall With Baseboard Diffuser Including Various Vane Angles en_US
dc.type Article en_US

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