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首页> 外文期刊>E3S Web of Conferences >Impact of different mechanical ventilation strategies for night purging on indoor air quality in public buildings
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Impact of different mechanical ventilation strategies for night purging on indoor air quality in public buildings

机译：不同机械通风策略对公共建筑室内空气质量的影响影响

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Night-time ventilation has been used in non-residential buildings to enhance indoor air quality before occupied periods. However, many hypotheses exist on how this ventilation should be used. A typical choice has been to shut down the ventilation after occupancy and restart the ventilation again 2 hours before occupancy. Another option has been to ventilate the buildings continuously. In this study, the shut-down, continuous, and intermittent ventilation strategies were compared by evaluating indoor air quality. The daily occupied-hour ventilation was kept as usual. Each test case lasted for 2 weeks. Indoor air quality was assessed by measuring TVOC concentrations. Also, the thermal conditions, carbon dioxide, and pressure differences over the building envelope and over the air distribution devices were measured. The results show that the averaged TVOC concentrations were at the same level in the mornings with all those ventilation strategies. The evening concentrations reached a minimum level after a 2-hour purging period. TVOC concentrations were higher during the day than at night. This reveals that space usage had the largest effect on TVOC concentrations. The results indicate that a 2-hour purging is enough to cleanse indoor air before occupancy, and therefore the continuous night-time ventilation is not necessary.
机译：在非住宅建筑中使用夜间通风，以提高占用期前的室内空气质量。但是，许多假设都存在应如何使用该通风。典型的选择是在占用后关闭通风，并在入住前再次重新启动通风。另一种选择是不断通风建筑物。在这项研究中，通过评估室内空气质量来比较关闭，连续和间歇通气策略。每日占用时间通风往常被常用。每个测试用例持续2周。通过测量TVOC浓度来评估室内空气质量。此外，测量了在建筑物包络和空气分配装置上方的热条件，二氧化碳和压力差异。结果表明，随着所有这些通风策略，平均TVOC浓度在早晨处于同一水平。晚上浓度在2小时吹扫期后达到最低水平。在白天，TVOC浓度比晚上更高。这表明空间使用对TVOC集中具有最大的影响。结果表明，2小时的吹扫足以在占用前清洁室内空气，因此不需要连续的夜间通风。

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