Desenvolvimento de aplicativo para avaliação dos parâmetros da renovação de ar em ambientes hospitalares

Abstract

Air Renewal is considered one of the main features involving an air conditioning project in terms of air conditioning (where there are people). The lack of air renewal in an environment can cause viruses and bacteria to proliferate in the enclosure, as the air conditioning device has as its main function, only to circulate the ambient air, while the air renewal equipment will make the exchange (in percentages) of indoor and outdoor air, thus ridding contaminated air. Regardless of the capacity of the air conditioning equipment, all environments must contain devices that perform the exchange of ambient air. In accordance with world references and with ABRAVA – Brazilian Association of Refrigeration, Air-Conditioning, Ventilation and Heating, it informs that the use of air conditioners has long ceased to be a luxury item because of its characteristics and needs that humanity has been looking for in their daily lives. A person breathes about ten thousand liters of air a day, this makes individuals seek better thermal comfort when working, studying or even in some kind of leisure. The dilution of particulates contained in air-conditioned environments is already possible through mechanical ventilation, when the means of exhausting the environment do not contain the minimum necessary (ABRAVA, 2022). For the proposed study, the main vision is to contemplate the parameters of hospital air renewal, but as air conditioning is present in practically all human living, the study also includes different types of environments accepted in the regulations. The study proposal was characterized by the use of an Air Renewal application, containing all the mathematical parameters for the choice of exhaustion of the air-conditioned environment. This application was validated by the fact that it was supplied to engineering companies or professionals in the HVAC-R area (Heating, Ventilating and Air Conditioning / HVAC - Heating, Ventilation and Air Conditioning) who have or develop Air Conditioning projects, mainly in the Hospital area, but it will have functionality for any type of environment that complies with the Brazilian Norms or Resolutions. With the exception of the application, which was delivered only to engineering teams or technicians in the area, two questionnaires were developed. The first questionnaire was applied to the users of the application and the second questionnaire was carried out with general questions seeking to know the population's knowledge of the importance of air quality. The two questionnaires had the function of testing the usability of the application. For the questionnaire of the group that tested it, an acceptance of use of the software of 100% was noticed, in which the usability followed the following percentages, 53.8% (often), 30.8% (always) and 15.4% (reasonably), thus indicating that there was no rejection or refusal of functionality and relevance to the everyday use of the application.