Abstract
In high-rise buildings, the stack effect causes various problems, especially problems related to excessive pressure differences across main entrance doors and elevator doors, particularly in heating seasons. To reduce the stack effect, this study aims to find effective operation schemes for the HVAC systems in a 60-story commercial building, located in Seoul, Korea. Field measurements were conducted to identify the problems related to the stack effect in the building. Computer simulations were conducted to examine the effectiveness of various HVAC operation schemes in reducing the stack effect. Then, an optimum and effective operation scheme was adopted from the computer simulation results and applied in the field. The adopted scheme was used to pressurize the upper zone of the building. Through field application and an adjustment process, a proper amount of air volume was found to effectively pressurize the upper zone of this building, solving the problems related to the stack effect. The required air volume for pressurization was maintained in the building by reducing the volume of the exhaust air (EA) while maintaining a constant volume of outdoor air (OA).
Highlights
Stack effect takes place in buildings due to buoyancy of heated air moving upward
Only the ∆Ps across the high-rise elevator doors on the first floor were summarized in Table 3 with the required air volume for each case
This study was conducted to find an effective HVAC operation scheme to solve the stack effect problem in a 60-story commercial building located in Seoul, Korea
Summary
Stack effect takes place in buildings due to buoyancy of heated air moving upward. The stack effect in buildings plays a positive role in intermediate and cooling seasons by increasing the natural ventilation through the buildings [1,2]. Many studies have been conducted to develop architectural and mechanical methods to reduce the stack effect in high-rise buildings [3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24]. Up until the early 2000s, many of these high-rise buildings were designed without considering proper architectural and mechanical methods to reduce the stack effect. Many of these buildings have been remodeled or are being investigated in an attempt to solve problems related to the stack effect, and the stack effect has emerged as an important issue in designing high-rise buildings
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