Abstract: Textile filter fabrics are an important part of the domestics and industries life, contributing to healthy environment by product purity and efficiency. Filters save energy and production costs by suitable selection of the filter for specific application. This paper implies principles of filtration in textiles, factors affecting filtration efficiency and testing methods as per American Society of Heating, Refrigeration and Air-conditioning Engineers (ASHRAE). The pore structure and permeability of filters play a major role in getting quality air, filters reduce the air pollution. The work of an air filters is to filter the dirt particles from intake air and supply cleaner air. Optimum utilization of filters can significantly reduce the cost of filters replacement frequently and keep the filters in used for longer time, this can be done by knowing the actual working condition (i.e. air flow rate and differential pressure) of the filters and select best filters which suits for that condition. In this study the main focuses are the effect of air flow rate (CFM) and differential pressure on dust concentration and performance on nonwoven filter media, the selection of the conditions (air flow rate and differential pressure) is done by simulating with air- conditioners, refrigerators and vacuum cleaners is taken under this study. A needle punched nonwoven fabric 200 and 120 GSM is used as filter and during testing filtration efficiency shows good co-relation with calculated value.as air flow rate increasing the service life of filter fabric reduces. The differential pressure decreases as filter clogs. Pressure drop is directly proportional to the temperature during filtration. It is found that the calculated service life of filter fabric helps the manufacturer to design a fabric with a better filtration efficiency and more service life. The air filtration efficiency tester designed simulates the actual working condition of filter fabric with more accuracy.

Keywords: Size of Particles, Air Velocity, Air Flow, Filtration Efficiency.

| DOI: 10.17148/IARJSET.2020.7802