On the Error of Empirical Models for Single-sided Ventilation under Great Indoor-outdoor Temperature Differences

In the north China, Only a few mechanical ventilation systems were installed for buildings and single-sided ventilation by opening window is quite common in winter. Heat loss of single-sided ventilation is an issue in need of concern. Hence, the relatively precise calculation of its air change rate...

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Bibliographic Details
Published in:Procedia engineering 2017, Vol.205, p.744-750
Main Authors: Huang, Kailiang, Jiang, Bian, Feng, Guohui, Song, Jiasen, Chang, Qunpeng, Chen, Zongsheng, Zhang, Yixian
Format: Article
Language:English
Subjects:
Empirical models
Error
Experimental tests
Single-sided ventilation
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Summary:In the north China, Only a few mechanical ventilation systems were installed for buildings and single-sided ventilation by opening window is quite common in winter. Heat loss of single-sided ventilation is an issue in need of concern. Hence, the relatively precise calculation of its air change rate (ACR) is a must. This paper studies the reliability of 3 empirical models for single-sided ventilation calculation under great indoor-outdoor temperature differences; a real-sized room was prepared for the experimental tests in winter. For the initial time, the percentage deviations for the empirical models were 11.8%, 12.8%, 7.3%, respectively. The discrepancy between the experimental and empirical results increased unreasonably when opening window process continued for 20 minutes. Empirical models for single-sided ventilation were not reliable for ACR calculation in winter of the north China even though the results in the initial time were acceptable. Cross-stream interfacial mixing might be a contribution for this error.
ISSN:1877-7058
1877-7058
DOI:10.1016/j.proeng.2017.10.005