| Title |
A Study on Performance Improvement Measures of Pressurized Smoke Control Systems for Exit Passageways of High-Rise Buildings |
| Authors |
손봉세(Bong-Sae Son) ; 김진수(Jin-Soo, Kim) |
| Keywords |
연돌효과 ; 한계유동 ; 한계높이 ; 차압해소 ; 과압배출댐퍼 Stack effect ; Limit flow ; Limit height ; Differentialpressure dissolution ; Overpressure exhaust damper |
| Abstract |
One of the biggest problems in smoke control systems for high-rise buildings is stack effect, but there are no recognized methods or measures to solve the problem of stack effect as yet. The stack effect can be overcome by forming the uprising current inside the stair hall properly, but there is a limit to the height in supplying into the stair hall the smoke control air volume to be supplied to a floor in case of escape from fire. The limit to the height can be extended by overcoming the stack effect by pressurizing the stair hall and the ancillary room simultaneously. It can also be anticipated that the stack effect can be overcome by connecting the air supply shaft to the stair hall at the top. As a result of computer simulations using a network type of tool, it is found that adequate performance can be achieved by pressurizing the stair hall only for a building of 190m or less, and up to 360m when pressurizing the stair hall and the ancillary room simultaneously. In all those cases, however, an overpressure venting damper is required which operates within a suitable range for venting the overpressure outside. |