Heat Transfer From an Isothermal Vertical Surface With Adjacent Heated Horizontal Louvers: Validation
Author:
Collins M.1, Harrison S. J.2, Naylor D.3, Oosthuizen P. H.2
Affiliation:
1. Dept. of Mechanical Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada 2. Dept. of Mechanical Engineering, Queen’s University, Kingston, Ontario K7L 3N6, Canada 3. Dept. of Mechanical, Aerospace, and Industrial Engineering, Ryerson University, Toronto, Ontario M5B 2K3, Canada
Abstract
The present study examines the influence of heated, horizontal, and rotateable louvers on the convective heat transfer from a heated or cooled vertical isothermal surface. The system represents an irradiated Venetian blind adjacent to the indoor surface of a window. Detailed temperature field and local surface flux data were obtained using a Mach-Zehnder Interferometer for two window temperatures (warm and cool compared to ambient) and irradiation levels, two louver to plate spacings, and three louver angles. The results have been compared to a steady, laminar, two-dimensional, conjugate conduction/convection/radiation finite element model of this problem. The effect of the heated louvers on the heat transfer rate from the plate surface has been demonstrated and the results of the numerical study have been validated.
Publisher
ASME International
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference14 articles.
1. Machin, A. D., Naylor, D., Oosthuizen, P. H., and Harrison, S. J., 1998, “Experimental Study of Free Convection at an Indoor Glazing Surface with a Venetian Blind,” Journal of HVAC&R Research, 4(2), pp. 153–166. 2. Ye, P., Harrison, S. J., Oosthuizen, P. H., and Naylor, D., 1999, “Convective Heat Transfer from a Window with Venetian Blind: Detailed Modeling,” ASHRAE J., 105(2), pp. 1031–1037. 3. Phillips, J., Naylor, D., Oosthuizen, P. H., and Harrison, S. J., 2000, “Modeling of the Conjugate Heat Transfer from a Window Adjacent to a Louvered Shade,” Sixth International Conference on Advanced Computational Methods in Heat Transfer, Madrid, Spain, pp. 127–136. 4. Collins, M. R., Harrison, S. J., Oosthuizen, P. H., and Naylor, D., 2002, “Heat Transfer from an Isothermal Vertical Flat Plate With Adjacent Heated Horizontal Louvers: Radiation Analysis,” Submitted for publication to ASME Journal of Heat Transfer. 5. Naylor, D., and Duarte, N., 1999, “Direct Temperature Gradient Measurement Using Interferometry,” Exp. Heat Transfer, 12, pp. 279–294.
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