Natural Ventilation: Optimizing Window Opening Size for CO2 Concentration Control and Thermal Comfort on Nonwindward Facades

IF 4.3 2区 环境科学与生态学 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Indoor air Pub Date : 2024-10-04 DOI:10.1155/2024/1435400
Hsieh-Chih Hsu, Chin-Wei Chang, Chien-Chih Chen, Chen-Yu Pan
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引用次数: 0

Abstract

Natural ventilation has become a focal point due to its positive impact on indoor air quality, expanding its role in addressing thermal comfort issues in schools. Despite previous studies exploring various approaches to enhance natural ventilation, factors such as classrooms facing non-windward directions and optimal window opening sizes have not been adequately considered. This lack of consideration poses challenges for implementation in school environments. To address this issue, this study employed response surface methodology, back-propagation neural network, and multiple linear regression to investigate the effects of different factors on natural ventilation. Experiments were conducted in classrooms facing nonwindward directions, measuring indoor air changes per hour (ACH) during peak noon temperatures. Thermal comfort was assessed using the predicted mean vote (PMV). The experimental results showed that single window openings provided better thermal comfort compared to cross window openings while maintaining indoor CO2 concentrations below 1000 ppm. Furthermore, subsequent analysis revealed that the opening size (open and open/gap) increases the range of ACH, suggesting avenues for future research to enhance natural ventilation practices. This underscores natural ventilation’s potential in maintaining indoor thermal comfort and CO2 levels under challenging conditions.

Abstract Image

自然通风:优化开窗尺寸,实现非迎风面的二氧化碳浓度控制和热舒适性
自然通风对室内空气质量有积极影响,在解决学校热舒适问题方面发挥着越来越大的作用,因此已成为一个焦点。尽管以前的研究探索了各种加强自然通风的方法,但诸如教室朝向非迎风方向和最佳开窗尺寸等因素尚未得到充分考虑。这种考虑不足给在学校环境中实施自然通风带来了挑战。为解决这一问题,本研究采用响应面方法、反向传播神经网络和多元线性回归来研究不同因素对自然通风的影响。实验在朝向非迎风方向的教室中进行,测量中午气温高峰时每小时的室内换气次数(ACH)。热舒适度采用预测平均投票(PMV)进行评估。实验结果表明,在将室内二氧化碳浓度保持在 1000 ppm 以下的情况下,单窗开度比十字窗开度能提供更好的热舒适度。此外,随后的分析表明,开窗尺寸(开窗和开窗/间隙)会增加 ACH 的范围,这为今后研究加强自然通风实践提供了途径。这凸显了自然通风在挑战性条件下保持室内热舒适度和二氧化碳浓度的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Indoor air
Indoor air 环境科学-工程:环境
CiteScore
10.80
自引率
10.30%
发文量
175
审稿时长
3 months
期刊介绍: The quality of the environment within buildings is a topic of major importance for public health. Indoor Air provides a location for reporting original research results in the broad area defined by the indoor environment of non-industrial buildings. An international journal with multidisciplinary content, Indoor Air publishes papers reflecting the broad categories of interest in this field: health effects; thermal comfort; monitoring and modelling; source characterization; ventilation and other environmental control techniques. The research results present the basic information to allow designers, building owners, and operators to provide a healthy and comfortable environment for building occupants, as well as giving medical practitioners information on how to deal with illnesses related to the indoor environment.
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