Wind effects on the performance of solar collectors on rectangular flat roofs: A wind tunnel study

Wind effects on the performance of solar collectors on rectangular flat roofs: A wind tunnel study. Ladas, D. I., Stathopoulos, T., & Rounis, E. D. Journal of Wind Engineering and Industrial Aerodynamics, 161:27 - 41, 2017. Boundary layer wind tunnel;Concordia University;Induced convections;Isolated buildings;Local flows;Rectangular Buildings;Thermal Performance;Wind velocity distributions;

Paper abstract bibtex

Wind induced convection is the main cause of heat loss for roof-mounted solar collectors. In this study the importance of using the actual wind velocity distributions over the whole roof area, instead of a commonly assumed single velocity of a reference location, is addressed through experimental measurements and numerical assessment of the performance of solar collectors placed on different locations over the roof of a typical rectangular building. The measurements were carried out at the Boundary Layer Wind Tunnel of Concordia University, for nine different locations on the roof, three different wind directions and cases concerning both an isolated building and a building with surroundings of various configurations. For the isolated building case, it was found that local velocities on different roof locations may vary more than 60% and the effect of these differences on the performance of solar collectors placed on these locations was assessed. In an attempt to generalize the results, 17 different surrounding configurations were considered. For a typical day in Montreal (with 4–7 m/s average wind speed), it was found that the thermal gains between solar collectors at different locations over the same roof could vary up to 21%.

@article{20170203230900 ,
language = {English},
copyright = {Compilation and indexing terms, Copyright 2023 Elsevier Inc.},
copyright = {Compendex},
title = {Wind effects on the performance of solar collectors on rectangular flat roofs: A wind tunnel study},
journal = {Journal of Wind Engineering and Industrial Aerodynamics},
author = {Ladas, Dimitrios I. and Stathopoulos, Theodore and Rounis, Efstratios Dimitrios},
volume = {161},
year = {2017},
pages = {27 - 41},
issn = {01676105},
abstract = {<div data-language="eng" data-ev-field="abstract">Wind induced convection is the main cause of heat loss for roof-mounted solar collectors. In this study the importance of using the actual wind velocity distributions over the whole roof area, instead of a commonly assumed single velocity of a reference location, is addressed through experimental measurements and numerical assessment of the performance of solar collectors placed on different locations over the roof of a typical rectangular building. The measurements were carried out at the Boundary Layer Wind Tunnel of Concordia University, for nine different locations on the roof, three different wind directions and cases concerning both an isolated building and a building with surroundings of various configurations. For the isolated building case, it was found that local velocities on different roof locations may vary more than 60% and the effect of these differences on the performance of solar collectors placed on these locations was assessed. In an attempt to generalize the results, 17 different surrounding configurations were considered. For a typical day in Montreal (with 4&ndash;7 m/s average wind speed), it was found that the thermal gains between solar collectors at different locations over the same roof could vary up to 21%.<br/></div> &copy; 2017 Elsevier Ltd},
key = {Roofs},
keywords = {Location;Boundary layers;Wind tunnels;Solar collectors;Wind effects;Velocity distribution;},
note = {Boundary layer wind tunnel;Concordia University;Induced convections;Isolated buildings;Local flows;Rectangular Buildings;Thermal Performance;Wind velocity distributions;},
URL = {http://dx.doi.org/10.1016/j.jweia.2016.12.008},
}

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