Methods of calculating the exhaust hoods
author:
Elżbieta Rybak-Wilusz, Paweł Kut
ORCID ID:
0000-0002-8887-2844, 0000-0002-2472-0454
No:
10/2020 Instal p. 34-38
DOI:
10.36119/15.2020.10.5
Contaminants generated in technological processes cause a decrease in air quality in the internal environment. The
content of harmful substances in workplaces should not exceed the maximum permissible concentrations. The local
exhaust ventilation systems used in workplaces serve to reduce the content of contaminants and maintain the
appropriate air quality. The key element of the local exhaust ventilation system is the canopy hood. It is located in the
zone of formation of harmful substances, captures the contaminants removed together with the extracted air stream.
The paper presents methods of calculating the exhaust hoods. The principles of hood dimensioning and the main
factors determining the methodology of calculating the amount of extracted air were determined. It was indicated
that the application of an appropriate method of calculating mainly depends on the type of source emitting the
pollution, the location of the hood in relation to the source of contaminant and the nature of movement of the air
stream extracted through the hood.
Keywords:
About Authors:
dr inż. Elżbieta Rybak-Wilusz https://orcid.org/0000-0002-8887-2844, mgr inż. Paweł Kut https://orcid.org/ 0000-0002-2472-0454 –Politechnika Rzeszowska, Zakład Ciepłownictwa i Klimatyzacji, Rzeszów.
Corresponding authors: elrywi@prz.edu.pl; p.kut@prz.edu.pl