A Short Note on Using a Time Constant in Specifying Smoke Filling Time in an Atrium Under an Unsteady Fire

Author:

Chow W.K.1

Affiliation:

1. Department of Building Services Engineering The Hong Kong Polytechnic University Hung Hom, Kowloon, Hong Kong

Abstract

A time constant derived from a t-squared fire with the geometry of an atrium is proposed to specify the smoke filling time. The smoke filling pro cesses in 27 atria with volume varying from 2,500 to 35,000 m3 were simulated by the fire zone model CFAST version 2.0. The atria are located adjacent to a "fire" shop at a lower level. Correlation relationships between the smoke filling time and the time constant are derived. Further, performance of smoke control systems in the atria are evaluated.

Publisher

SAGE Publications

Subject

Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality

Reference11 articles.

1. Smoke development and engineering aspects of smoke-extraction systems for atria in Hong Kong

2. On the evaluation of a ?time constant? for studying the smoke-filling processes in atrium spaces

3. Chow, W.K. 1995. "Fire Aspects for Atrium Building in Hong Kong," in Proceedings of the 7th International Research and Training Seminar on Regional Development Planning for Disaster Prevention

4. , "Improved Fire Safety System in Developing Countries," United Nations Centre for Regional Development (UNCRD), October 17, 1994, Tokyo, Japan UNCRD Proceedings Series No. 7, p. 99-109 UNCRD, Nagoya, Japan.

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