Identyfikatory
Warianty tytułu
The Standard Amount of Ventilation Air for the Classroom and the Possibility of Air Infiltration Through Windows
Języki publikacji
Abstrakty
W Polsce w ostatnich latach widoczna jest tendencja do hermetyzacji budynków. Dotyczy to zarówno budynków starszych poddawanych rewitalizacji, jak i nowych lub termomodernizowanych. Sprzyja temu między innymi wymiana okien na zbyt szczelne w istniejących obiektach. Przy występujących w przeważającej części budynków edukacyjnych systemach wentylacji naturalnej (grawitacyjnej) stosowanie nadmiernie szczelnych okien ogranicza w znaczącym stopniu napływ powietrza z zewnątrz do pomieszczeń. Badaniu pod tym kątem poddano pełną miejską zbiorowość statystyczną 50 budynków szkół w Częstochowie. W przeważającej części okna w tych budynkach były w złym lub bardzo złym stanie technicznym i charakteryzowały się dużą nieszczelnością. Z uwagi na swoje wady są one źródłem nadmiernych strat ciepła z ogrzewanych pomieszczeń. Okazuje się jednak, że znaczna nieszczelność okien (wsp. infiltracji a na poziomie 6-7 m3/(m·h·daPa2/3)) jest niezbędna do stosunkowo poprawnego funkcjonowania wentylacji naturalnej i napływu odpowiedniej ilości powietrza wentylacyjnego do sal lekcyjnych, w których przebywają uczniowie. Niestety po wymianie okien na nowe i braku ingerencji w system wentylacji można spodziewać się znacznego pogorszenia warunków przebywania w salach lekcyjnych, przede wszystkim z uwagi na niespełnianie wymagania dostarczania odpowiedniej ilości powietrza wentylacyjnego.
In the last few years in Poland there has been a tendency towards air-tight sealing of buildings. This phenomenon can be seen both in older buildings being refurbished as well as in new or thermally-upgraded ones. The factor contributing to this situation is the use of excessively air-tight windows when replacing old ones in existing buildings. Since majority of educational buildings are equipped with a natural (gravity) ventilation systems, the use of excessively air-tight windows significantly reduces the inflow of fresh air into the rooms. A complete statistical urban population of 50 school buildings in the town of Czestochowa have been examined from this point of view. In the majority of cases windows in those buildings were in a bad or very bad technical condition and their air-permeability was very high. Their defects cause excessive heat losses from heated rooms. It turns out, however, that high air-permeability of windows (rate of outdoor air leakage at the level of 6-7 m3/(m·h·daPa2/3)) is necessary for relatively proper functioning of natural ventilation and sufficient inflow of fresh air into the classrooms in which students spend a lot of time. Unfortunately, as a result of replacement of old windows with new ones and of failure to make any changes in the ventilation system, a considerable deterioration of microclimate in classrooms can be expected, especially due to non-compliance with the requirements related to he supply of sufficient amount of fresh air.
Wydawca
Czasopismo
Rocznik
Tom
Strony
22--29
Opis fizyczny
Bibliogr. 41 poz., tab., wykr.
Twórcy
autor
- Politechnika Częstochowska, Wydział Inżynierii Środowiska i Biotechnologii
Bibliografia
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Uwagi
PL
Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.
Typ dokumentu
Bibliografia
Identyfikator YADDA
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