Abstract
This study involved a series of computational fluid dynamics simulations to evaluate the effectiveness of stack and displacement ventilation in providing better thermal comfort in an air-conditioned office building. To reduce energy consumption, the public area of the studied building is cooled by air from air-conditioned rooms with lower temperatures. The air, which is driven by buoyancy, then, flows outside through the multistory atrium. The simulation results indicated that displacement ventilation provides superior thermal comfort performance relative to stack ventilation. A design with a higher ceiling, a higher heat source and a lower inlet with cold air can substantially enhance the efficiency of displacement ventilation. Furthermore, handrails near the atrium play a crucial role because they help to retain cold air in the public space for a longer period, thereby contributing to a better predicted mean vote value.
Highlights
Atrium design has been widely applied in commercial buildings worldwide to improve aesthetics and use of natural daylight [1,2]
Utilization of leaked air with cooler temperatures office rooms,areas and and a multistory fully air-conditioned office rooms; instead, the focusfrom was on the public utilization atrium was used to drive stack and displacement ventilation to improve thermal of leaked air with cooler temperatures from office rooms, and a multistory atrium comfort
Linden [9] revealed that the flow driven by heat sources with heat flux W can be characterized by the buoyancy flux, which is calculated using the following equation: 4. Methodology
Summary
Atrium design has been widely applied in commercial buildings worldwide to improve aesthetics and use of natural daylight [1,2]. Lighting performance is almost proportional to the area of a glass roof and inversely proportional to the height of a building; in an indoor thermal environment, lighting performance is almost inversely proportional to the area of a glass roof and proportional to the height of a building [3]. The thermal environment in a building with an atrium is stratified, and stack ventilation is complex and dynamic [4]. Given that building atriums tend to be large, these spaces may lead to high energy consumption that accounts for up to 60% of a building’s total energy consumption if heating, ventilation, and air-conditioning system or building design are not appropriate [5]
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