Development of a low-pressure loss PM2.5 filter for building natural ventilation

This paper presents the development and experimental testing of an innovative low-pressure loss PM2.5 filter channel that can be integrated in building facades. This indoor-outdoor filter uses electrostatic precipitation (ESP) to reduce outdoor PM2.5 ingress into the indoor environment while ensuring the low airflow resistance that natural ventilation systems require. The filter uses a U shaped channel that allows for the integration of ESP and an acoustic attenuation component in a device that fits in the shallow depth of common building facades. The proposed filter device has a 0.5 m height, a 0.4 m width and 0.3 m depth. A 0.1 m opening height allows for a nominal airflow of 70 m3/h with an average inflow velocity of 0.5 m/s. The development and testing work presented in this paper used a combination of laboratory experiments and computational fluid dynamics simulations. Experimental results show that the PM2.5 collection efficiency of the device is more than 60%.

Automated summary

This paper presents the development and experimental testing of an innovative low-pressure loss PM2.5 filter channel. The filter uses electrostatic precipitation (ESP) technology to reduce outdoor PM2.5 ingress into the indoor environment while ensuring low airflow resistance required by natural ventilation systems. Experimental results show that the PM2.5 collection efficiency of the device is more than 60%.