NASA Glenn inventor Juan Agui and inventor Rajagopal Vijayakumar have developed a novel Multi-Stage Filtration System that collects a wide range of particle sizes with minimal filter changes. High-efficiency particulate arresting (HEPA) filters used to collect ultrafine particles do not need to be changed frequently, but the pre-filtration systems they require need to be changed as often as weekly; in particle-rich environments, this can become a chore. Glenn’s innovative multi-stage system combines a pre-filtration impactor and a scroll filter that reduces the need to clean or replace the more sensitive or expensive filters, which can be resource- and time-intensive. The resulting time savings offer great potential for commercial development.
Applications benefiting from Glenn’s breakthrough system include HEPA filters, fluid and gas dynamic research for flow imaging, air and gas systems, microgravity environments, fluid mechanics, commercial aircraft, submarines, and remote instruments.
Key advantages of this technology include a minimal need for maintenance and robustness in withstanding extreme temperatures, particle-laden, and high-pressure environments.
An informative article about this technology appeared in Tech Briefs: In Situ Particle Generator.