Pulchowk Students Develop Low-Cost Air Purifier With Washable, Reusable Filter
असार १५, २०८३ १३:३५
Kathmandu: Two Electrical Engineering students from Pulchowk Campus have developed a prototype air purifier that uses a washable filter instead of a replaceable one, offering a low-cost alternative to conventional air purification systems.
The prototype, named 'Aero Clean,' was developed by seventh-semester students Riya Jha and Gyandeep Timilsina under the STEAM project of the then Ministry of Education, Science and Technology. The project was supervised by Associate Professor Jitendra Chaudhary.
Unlike conventional air purifiers that rely on High-Efficiency Particulate Air (HEPA) filters, Aero Clean uses an electrostatic precipitator (ESP) and a honeycomb-structured filtration system. The ESP charges airborne particles using high voltage and captures them on silver foil, while the honeycomb structure traps the remaining fine particles. The system is powered by a 12-volt brushless DC fan.
According to the students, the purifier can reduce PM2.5 to PM10 particulate matter by more than 65 percent in a single cycle, making it effective in removing harmful airborne pollutants.
Riya Jha said the purifier's biggest advantage is that its filter does not need to be replaced. Instead, it can be washed with water and reused, significantly lowering maintenance costs compared to HEPA-based air purifiers.
The cylindrical purifier, inspired by a beehive's honeycomb and helical airflow design, is intended for use in homes, classrooms and offices. It also features real-time Air Quality Index (AQI) monitoring, allowing users to operate the purifier only when necessary, thereby reducing electricity consumption.
During testing, the team filled a room with smoke, increasing the AQI to between 500 and 600. They said Aero Clean reduced the AQI to between 40 and 50, a level considered satisfactory under World Health Organization guidelines.
The prototype was developed after reviewing research on micro-vortex structures. While the students reported promising results, they acknowledged that the prototype still faces technical challenges, particularly with its voltage generator, and are exploring improvements.
The team said developing the prototype cost around Rs 50,000, mainly due to its design and 3D printing. However, they estimate that commercial-scale production could reduce the retail price to between Rs 10,000 and Rs 12,000.
By comparison, HEPA-based air purifiers available in the market typically cost between Rs 20,000 and Rs 30,000 and require periodic filter replacement. The students believe Aero Clean could offer a more affordable and sustainable alternative because of its reusable filter and lower power consumption.
पछिल्लो अध्यावधिक: असार १५, २०८३ १३:३५
