Paper Conference

Proceedings of eSim 2014: 8th Conference of IBPSA-Canada


Wind effects on the performance of solar collectors on roofs

Dimitrios Ladas, Ted Stathopoulos

Abstract: Convective heat losses depending greatly on the cooling effect of wind, affect the energy performance of solar collectors. The present study demonstrates the importance of using actual velocity distributions corresponding to different locations on the roof, as opposed to a single wind velocity value measured at a reference location. A series of velocity measurements have been conducted to assess the optimum location of a collector on the roof of a commercial-size building model tested at the boundary layer Wind Tunnel laboratory of Concordia University. Wind velocity measurements were performed at nine different locations above the roof and for three different wind directions (0°, 45°, and 90°). The study found that local velocities on different roof locations can vary up to 62% and also assessed the wind impact on a flat-plate solar collector’s performance characteristics when placed on different locations of the roof of a building model. It was estimated that for a typical sunny day, thermal energy gains can be 17% higher on windward than leeward locations.
Pages: 969 - 983