Experimental study on the thermal control of a roof-top collective building antenna using a porous matrix filled with Water-Copper nanofluid. (April 2022)

• Record Type: Journal Article
• Authors: Sastre, F.; Martin-Garin, A.; Martin, E.; Velazquez, A.; Baïri, A.
• Is Part Of: Case studies in thermal engineering. Volume 32(2022)
• Publication Date: 2022-04
• Subjects: Smart building -- Thermal regulation -- Electronics engineering -- Collective automation antenna -- Nanofluid -- Porous media; Heat engineering -- Case studies -- Periodicals; 621.40205
• DOI: 10.1016/j.csite.2022.101869
• Languages: English
• ISSNs: 2214-157X

Abstract

Abstract: This experimental work addressed the thermal control a roof-top collective building antenna meant to control home equipment in smart buildings. The antenna was placed inside a concentric quasi-cylindrical cavity maintained at low temperature. Cooling was provided by a Water-Copper nanofluid saturated porous matrix placed between the antenna and the enclosure. The ratio of the thermal conductivity of the porous material to that of the water varied from 4 up to 41.2. The nanoparticles volume fraction varied between 0% and 5%. The main result was a new semi-empirical correlation that allows for the determination of the antenna's average surface temperature as a function of the governing parameters: ratios of nanofluid to water and porous media to water thermal conductivities, nanoparticles volume fraction, and Rayleigh number. The applicability of the correlation was illustrated for a practical application case. It was found that, for some cases, the proposed thermal control system improves power dissipation by a factor of 33% as compared with the case of pure water (2 kW versus 1.5 kW). Highlights: Thermal control of a collective building finned cylindrical antenna. Nanofluid combined with porous media. Antenna temperature correlation for a range of governing parameters. Application case to a smart building collective antenna.