The negative and positive pressure system of natural balanced ventilation
Autor
Gaczoł, Tomasz
Opublikowane w
Technical Transactions
Numeracja
Vol. 117, iss. 1
Data wydania
2020
Miejsce wydania
Kraków
Wydawca
Wydawnictwo Politechniki Krakowskiej
Sekcja czasopisma
Civil Engineering
Język
angielski
eISSN
2353-737X
DOI
https://doi.org/10.37705/TechTrans/e2020026
Słowa kluczowe
positive pressure, negative pressure, supply, exhaust, exchange rate, air stream
Abstrakt
This paper discusses the results of research conducted with the Ansys Fluent programme on the air flow through natural ventilation supply and exhaust ducts of rooms located on the ground and upper floor of a building. A scenario with air inflow to a room through an air intake located on the basement floor level was selected for the tests. All simulations were performed for outdoor temperatures of +3,+12, and -15°C (simulations run for an outdoor air temperature of +12°C are discussed in detail). The temperature inside the room is +20°C, i.e. at the minimum temperature level for thermal comfort. The simulations address such issues as the pressure system inside the room and in the exhaust duct, the distribution of air temperature in the room and the vector direction of airflow through the supply and exhaust ducts.
