Experimental Analysis of CO2 Concentration Changes in an Apartment Using a Residential Heat Recovery Ventilator

Sustainability

Taeyeon Kim¹  Kyungjoo Cho²  Dongwoo Cho² 

[1] Department of Architecture & Architectural Engineering, Yonsei University, Seoul 03772, Korea;Korea Institute of Civil Engineering & Building Technology, 283 Goyangdae-ro, Ilsanseo-gu, Goyang-si 10223, Korea;

关键词: mechanical ventilation systems;    minimum ventilation level;    Korea housing;    CO₂ concentration;    apartment ventilation;   

DOI  :  10.3390/su131810302

来源: DOAJ

【 摘 要 】

Korean law requires at least three levels of control for apartment ventilation systems, including 0.5 air change per hour (ACH). When this law was enacted, it was believed that a 0.5 ACH air flow rate would be sufficient for apartments following building completion. However, ventilation systems cause different air qualities in each space within a unit, depending on infiltration rate and number of occupants. In addition, the current ventilation rate standard is based on an apartment unit’s total area, assuming that all room doors are open. In this study, changes in CO₂ concentration were experimentally analyzed based on the number of occupants and various ventilation frequencies with closed doors to analyze air quality differences among rooms in a typical 85 m² apartment unit in Korea. When the 0.5 ACH ventilation was performed, maintaining 1000 ppm or less was difficult if four people stayed for more than two hours in the living room or two people stayed for more than one hour in the bedroom with closed doors. Our results indicate that it is challenging to maintain a CO₂ concentration of 1000 ppm when doors are closed as standards are calculated based on a unit’s total area. Therefore, ventilation systems should be required to provide different air volumes for each room.

【 授权许可】

Unknown