H. Schepers, R. Cole, N. Johnson
Bibliographic info:
Healthy Buildings 2003 - Proceedings 7th International Conference (7th-11th December 2003) - National University of Singapore - Vol. 2, pp 810-813, 1 Fig.

During the construction of Dhoby Ghaut Station on the MRT North-East line a 10-storeycommercial development was completed. The facade is a vented cavity of a triple glazedconstruction comprising of an Insulated Glazed Unit, cavity blind with natural ventilation, anda single internal operable glazed layer. This type of facade technology has been used inEurope; however, its relevance in tropical climates where buildings are cooling-dominatedneeds to be carefully considered. This paper discusses how the system is optimized toimprove thermal comfort adjacent to the facade whilst maintaining energy efficiency in thetropics. Ventilating the cavity reduces the surface temperature of the internal pane of glass byrelieving the heat absorbed by the surfaces. Theoretically it is possible to achieve therecommended radiant asymmetry criteria recommended by ISO7730 by ventilating the cavityfor the glass construction. Subsequent to the facades construction testing has been performedto understand and identify actual levels of improvement in thermal comfort and efficiency.This paper discusses the findings of these tests.