Bluyssen Philomena M, Ortiz Marco, Zhang Dadi
Chair Indoor Environment, Faculty of Architecture and the Built Environment, Delft University of Technology, Julianalaan 134, 2628 BL, Delft, the Netherlands.
Build Environ. 2021 Jan 15;188:107475. doi: 10.1016/j.buildenv.2020.107475. Epub 2020 Dec 3.
High efficiency air filtration has been suggested to reduce airborne transmission of 'infectious' aerosols. In this study the 'air cleaning' effect as well as the effect on sound and air velocity (draught risk) of a mobile High-Efficiency Particulate Air (HEPA) filter system was tested for different settings and positions in the Experience room of the SenseLab. From both the noise assessments by a panel of subjects and sound monitoring it was concluded that the mobile HEPA filter system causes an unacceptable background sound level in the tested classroom setting (Experience room). With respect to the air velocity measurements and draught rating calculations, it was concluded that both depend on the position and the setting of the HEPA filter system as well as on the position and height of the measurements. For the removal of aerosols simulated by air-filled soap bubbles in front of the subject, the mobile HEPA filter system performed better as compared to the 'No ventilation' regime, for all settings and both positions, and for some settings, even better than all the tested mixing ventilation regimes. The use of a mobile HEPA filter system seems a good additional measure when only natural ventilation options are available. Future research should focus on rooms of different sizes or shapes, as this may also play a role in the filter's performance, noise and draught effects.
高效空气过滤已被建议用于减少“传染性”气溶胶的空气传播。在本研究中，针对SenseLab体验室内不同设置和位置，测试了移动高效空气过滤器（HEPA）系统的“空气净化”效果以及对声音和风速（通风风险）的影响。通过一组受试者的噪声评估和声音监测得出结论，在测试的教室环境（体验室）中，移动HEPA过滤系统会产生不可接受的背景声级。关于风速测量和通风评级计算，得出的结论是，两者均取决于HEPA过滤系统的位置和设置以及测量的位置和高度。对于在受试者前方用充气肥皂泡模拟的气溶胶去除，在所有设置和两个位置下，移动HEPA过滤系统的表现均优于“无通风”状态，并且在某些设置下，甚至优于所有测试的混合通风状态。当只有自然通风选项可用时，使用移动HEPA过滤系统似乎是一项很好的额外措施。未来的研究应侧重于不同尺寸或形状的房间，因为这也可能对过滤器的性能、噪声和通风效果产生影响。
