Heat Transfer From an Isothermal Vertical Surface With Adjacent Heated Horizontal Louvers: Numerical Analysis

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, Canada, N2L 3G1

2. Dept. of Mechanical Engineering, Queen’s University, Kingston, Ontario, Canada, K7L 3N6

3. Dept. of Mechanical, Aerospace, and Industrial Engineering, Ryerson University, Toronto, Ontario, Canada, M5B 2K3

Abstract

The present study examines the influence of heated, horizontal, and rotatable louvers on the convective and radiative 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 heat transfer results were obtained using a steady, laminar, two-dimensional, conjugate conduction/convection/radiation finite element model for two window temperatures (warm and cool compared to ambient) and irradiation levels, two louver to surface spacings, and three louver angles. The effect of the heated louvers on the heat transfer rate from the surface has been demonstrated.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Reference13 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. Klems, J. H., and Warner, J. L., 1992, “A New Method for Predicting the Solar Heat Gain Coefficient of Complex Fenestration Systems,” Thermal Performance of the Exterior Envelope of Buildings Conference V, Clearwater Beach, FL.

5. Wright, J. L., 1992, “Glazing System Thermal Analysis,” CANMET, Advanced Glazing System Laboratory, VISION3, Minister of Supply and Services Canada, University of Waterloo, 1992.

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