Abstract
This study investigated the ventilation efficiency and energy performance of three ventilation strategies—an all-air system (AAS), a radiant panel system with a displacement ventilation system (DPS), and a radiant panel system with a decentralized ventilation system (DVS). The research analyzed the indoor air quality (IAQ) in a high-rise building based on the building’s height, the air handling unit (AHU) location, air infiltration rate, outdoor air pollution rate, seasonal change, and air filter efficiency. The results indicated that the AAS had the best performance in terms of IAQ in the high-rise building in winter; however, the AAS also had the highest annual energy demand. For the same conditions, the DVS consumed less energy but had the worst performance in maintaining a satisfactory IAQ. Considering energy consumption, it is worth developing the DVS further to improve ventilation performance. By applying a double-filter system on the lower floors in a high-rise building, the DVS’s ventilation performance was dramatically improved while at the same time consuming less energy than the original DPS and AAS. The application of DVS can also minimize the negative effect of the infiltration rate on indoor air quality (IAQ) in a building, which means that the DVS can better maintain IAQ within a healthy range for a more extended period. Moreover, it was found that the DVS still had a substantial potential for saving energy during the season when the outdoor air was relatively clean. Hence, it is highly recommended that the DVS is used in high-rise buildings.
Highlights
IntroductionParticulate matter (PM) is the term used to describe the mixture of solid particles and liquid droplets found in the air
Introduction published maps and institutional affilParticulate matter (PM) is the term used to describe the mixture of solid particles and liquid droplets found in the air
This study aims to investigate the ventilation efficiency and energy performance of three ventilation strategies in controlling indoor air quality (IAQ), considering factors related to seasonal climatic changes, the height of the building, air handling unit (AHU) location, outdoor air quality, air filter efficiency, and air infiltration rate
Summary
Particulate matter (PM) is the term used to describe the mixture of solid particles and liquid droplets found in the air. Many investigations of elevated outdoor concentrations of PM have found positive correlations with a range of adverse health effects—from increased respiratory and cardiovascular morbidity to mortality [1,2,3,4,5,6,7]. People currently spend most of their time indoors, yet the outdoor particles can infiltrate into buildings through ventilation systems or leakage areas in the building’s envelope. Fine and ultra-fine PM particles are the most hazardous to human health [7], and they have the highest chance of entering the indoor environment through the building envelope via the infiltrating air [8].
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