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Detailed characterization of bedroom ventilation during heating season in a naturally ventilated semi-detached house and a mechanically ventilated apartment
Science and Technology for the Built Environment ( IF 1.9 ) Pub Date : 2020-11-30 , DOI: 10.1080/23744731.2020.1845019
Chandra Sekhar 1, 2 , Mariya Bivolarova 2 , Mizuho Akimoto 2, 3 , Pawel Wargocki 2
Affiliation  

Bedroom ventilation is crucial for providing good indoor air quality, which may contribute to achieving undisturbed sleep. This study presents a detailed characterization of bedroom carbon dioxide (CO2) profiles and ventilation during the heating season in Denmark. The measurements were made in a naturally ventilated (NV) semi-detached house, equipped with trickle vents on the windows and doors (augmented if needed with exhaust fans), and a mechanically ventilated (MV) apartment. The location of sensors in and around the immediate breathing zone of a sleeping person had measurable effect on the absolute level of CO2 only in the NV bedroom and not in the MV bedroom. Using the decay of occupant-generated CO2, the estimated breathing zone air change rate (ACR) was around 0.4 h−1 and 0.6 h−1 for the NV and MV bedrooms respectively. This was adequate for an average breathing zone CO2 level of 1000 ppm for the MV bedroom but not for the NV bedroom. The CO2 emission rate of 7.9–10.9 L/h.person during sleep, obtained from bedroom CO2 measurements, was lower than the estimated values of 12.8–13.9 L/h.person, using currently proposed methods in standards. Thermal comfort parameters during all the experimental sessions in both bedrooms were well within recommended levels.



中文翻译:

自然通风的半独立式房屋和机械通风的公寓在供暖季节卧室通风的详细特征

卧室通风对于提供良好的室内空气质量至关重要,而室内空气质量可能有助于实现无干扰的睡眠。这项研究详细介绍了丹麦采暖季节期间卧室二氧化碳(CO 2)分布和通风的特征。测量是在自然通风(NV)半独立式房屋中进行的,该房屋的门窗上装有滴流通风口(如果需要,还配有排气扇),以及机械通风(MV)公寓。仅在NV卧室而不是MV卧室,传感器在睡眠者即时呼吸区域内和周围的位置对CO 2的绝对水平有可测量的影响。利用乘员产生的CO 2的衰减,NV和MV卧室的估计呼吸区空气变化率(ACR)分别约为0.4 h -1和0.6 h -1。对于中压卧室而言,这足以满足1000 ppm的平均呼吸区CO 2水平,而对于中灰卧室而言,这是足够的。通过卧室中的CO 2测量获得的睡眠期间CO 2排放量为7.9-10.9 L / h.person ,低于使用标准中当前建议的方法得出的估计值12.8-13.9 L / h.h / person。在两间卧室的所有实验过程中,热舒适性参数均在建议水平内。

更新日期:2020-12-15
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