Evaluation of Outdoor Particle Infiltration into Classrooms Considering Air Leakage and Other Building Characteristics in Korean Schools

Ye Seul Eom, Bo Ram Park, Hee Won Shin and Dong Hwa Kang
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Ye Seul Eom: Department of Architectural Engineering, Graduate School, University of Seoul, Seoul 02504, Korea
Bo Ram Park: Department of Architectural Engineering, Graduate School, University of Seoul, Seoul 02504, Korea
Hee Won Shin: Department of Architectural Engineering, Graduate School, University of Seoul, Seoul 02504, Korea
Dong Hwa Kang: Department of Architectural Engineering, Graduate School, University of Seoul, Seoul 02504, Korea

Sustainability, 2021, vol. 13, issue 13, 1-18

Abstract: We analyzed the effects of air leakage and other building characteristics on outdoor particle penetration in classrooms. The building characteristics including air leakage of 12 Korean schools were investigated, and onsite measurements were conducted to estimate the outdoor particle infiltration. The correlations among variables associated with air leakage and building characteristics and outdoor particle infiltration were analyzed using the Pearson correlation analysis and linear regression. The effective leakage area (ELA) of classrooms varied highly from 340.8–1566.9 cm 2 , and a significant disparity in the air leakage characteristics among the classrooms appeared. The results of onsite measurement revealed that the average ELA was larger in the corridor side with an ELA corridor-side of 264.7 cm 2 than in the outdoor side (ELA outdoor-side of 93.1 cm 2 ). Results of correlation analysis indicated a high correlation (r = 0.68~0.78, p -value < 0.05) between the size resolved outdoor particle source (P × λ) and specific ELA. Particularly, a strong linear relation (R 2 = 0.69~0.71) with specific ELA corridor-side was seen. Results suggest that cracks between windows and doors in the corridor side considerably affect outdoor particle penetration. These results indicate the importance of improving the airtightness of not only the building envelope but also the inter-zonal walls for effectively reducing the outdoor particle infiltration into classrooms.

Keywords: outdoor particle infiltration; air leakage; blower-door test; school classroom; pearson correlation; regression analysis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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