Journal Article

·2019 OPEN ACCESS

DETERMINATION OF CONVECTIVE, RADIATIVE, AND TOTAL HEAT TRANSFER CHARACTERISTICS OVER A RADIANT HEATED CEILING: A COMPUTATIONAL APPROACH

Özgen Açıkgöz YTU

Journal of Thermal Engineering

Abstract

also been given in international standards for experimental approaches. In accordance with the experimental standards, the analyses are realized at the room dimensions of (L x H x W= 4 x 3 x 4 m), and at the thermal boundary conditions of (Tc= 35 – 50oC), (Tw= 15 – 24oC), (Tf= 15 – 24oC). As a result of iterations conducted using a computational fluid dynamics package program code, each corresponding to a case study, convective, radiative, and total heat fluxes from radiant heated ceiling are obtained, and afterward using relevant reference temperature proposed in the literature, heat transfer coefficients pertaining to convection, radiation, and total heat transfer have been found. In conclusion, average heat flux values of 95.83 Wm-2 and 17.49 Wm-2 are gained through the examined radiant heated ceiling, by means of radiation and convection, respectively. This denotes that roughly 85% of total heat transfer from the ceiling arises through radiation that is very compatible with the relevant literature. Finally, spanning the entire different case studies, average convective, radiative, and total heat transfer coefficients of 1.1 Wm-2K-1, 5.4 Wm-2K-1, 7.6 Wm-2K-1 are acquired.

Keywords

Ceiling (cloud) Radiative transfer Convection Convective heat transfer Thermodynamics Heat transfer Thermal radiation Mechanics Materials science Radiative cooling Radiation Environmental science Meteorology Physics Optics

Subject Areas

Radiative Heat Transfer Studies ·Computational Mechanics ·Physical Sciences
Building Energy and Comfort Optimization ·Building and Construction ·Physical Sciences
Heat Transfer Mechanisms ·Mechanical Engineering ·Physical Sciences

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