Efficient air ventilation with combined cleaning of pollutants

The results of a study aimed at developing a comprehensive solution for creating a safe air environment in residential and office premises are presented. An algorithm of actions has been developed, including administrative and hardware components, to ensure high efficiency of air purification and energy saving. The results of the study of the effectiveness of the "filter-heat exchanger" model aimed at simultaneously improving the quality of indoor air and reducing energy consumption are presented. A device has been developed and experimentally tested that provides savings of more than 500 watts per hour by using an air-to-air heat exchanger, where heat transfer occurs without additional heating of external air. A new method for determining the Nusselt number for heat exchangers of this type is proposed, based on the study of heat exchange during the transverse flow of both a separate pipe and a bundle of pipes in the range of Reynolds number 700 < Re < 3500. The study confirms the high efficiency of the air purification system, based on the use of a HEPA H11 filter and high air exchange rate, providing a minimum air purification efficiency of up to 95% of the original pollution. It is shown that increasing the volume of treated air significantly increases the cleaning speed, and each increase in the air exchange rate per unit reduces the cleaning time.