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Transport Phenomena in Thermal Engineering. Volume 2

ISBN:
1-56700-015-0 (Print)

SUPPLEMENTARY COOLING OF OFFICE BUILDINGS USING PLANAR HEAT PIPE PANELS

P.C. Bandopadhayay
CSIRO Division of Building, Construction and Engineering, P.O. Box 56, Highett, Victoria 3190, AUSTRALIA

H. Salt
CSIRO Division of Building, Construction and Engineering, P.O. Box 56, Highett, Victoria 3190, AUSTRALIA

J.G. Symons
CSIRO Division of Building, Construction and Engineering, P.O. Box 56, Highett, Victoria 3190, AUSTRALIA

Paul W. Cleary
CSIRO Mathematics, Informatics and Statistics, Clayton, Victoria 3169, Australia

A.N. Stokes
CSIRO Division of Mathematics and Statistics, Private Bag 10, Clayton, Victoria 3168, AUSTRALIA

Abstract

Many existing office buildings have inadequate cooling because of the increased thermal load associated with modern office equipment. The space limitations of many of these buildings do not allow the air-ducting to be increased to cope with increased thermal load. The chiller unit can in many cases be easily upgraded to higher capacity. Large planar heat pipe panels can also be positioned inside the air-conditioned space for augmenting the cooling capacity of the existing plant. These panels are thermally connected to the chilled water return line. The performance of the cooling panels is a function of their size and their position within the enclosed space.
Free convective heat transfer from thin cooling panels in various locations inside a room have been modelled numerically. Predictions of flow streamlines, flow velocities, local heat fluxes, and isotherms throughout the enclosure are given.
The simulation results are analysed in terms of the thermal efficiency of the panel. Meaningful ways of evaluating a human comfort index are explored.