The effectiveness of smoke exhaust from partition openings in a smoke control zone

• Main Authors: Hung-Chieh Cho, 卓鴻傑
• Other Authors: 蔡尤溪
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/8svhk8

碩士 === 國立臺北科技大學 === 能源與冷凍空調工程系碩士班 === 102 === Smoke from a fire site may spread to non-fire sites, with consequences of property loss, obstructing evacuation and firefighting. Therefore maintaining a tenable conditions in a case of fire, is an important concern of fire safety. This study focuses on the smoke exhaust from partitions in a smoke control zone. The relevant regulations and research literature were studied. Three actual building cases that have 2% smoke openings on the partition walls were used in the FDS computer models. It has been found that 2% opening on the partition wall is a viable substitute for installing smoke damper in the partition. The conclusion is based on the analytical results of exhaust volume from the partition opening and also the height of smoke layer during a fire. Specific results were as follows: 1. The research subject was rare in research literature. Regulations and standard are mostly for smoke control zones with no discussion on partitions. The results as presented are original contributions for partitions in a smoke control zone. 2. The smoke exhaust rate from the 2% opening can reach 1.0 cmm per meter of floor area of a partition, meet the regulation requirement. 3. The smoke control zone smoke exhaust can allow 43% more evacuation time. 4. Lower aspect ratio and higher installation are better for the partition openings. 5. The relative position of fire to the opening has no significant effects on smoke exhaust. 6. Shorter separation between the smoke damper and the opening is better for smoke exhaust. 7. Ceiling type and wall type smoke damper has not significant effects on smoke exhaust. Comprehensive analysis of the entire study showed that 2% opening as an effective alternative to mechanical smoke vent solutions, under the statutory standard installation, can reach to the equivalent performance of mechanical smoke vent.