Različite metode ventilacije i njihov uticaj na potrošnju energije za grejanje jedne predškolske ustanove
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Apstrakt
Cilj ovog istraživanja je ispitivanje uticaja dve različite metode ventilacije (Metode 1 i Metode 3), definisane prema standardu EN 16798, na predviđenu potrošnju energije za grejanje jednog vrtića u gradu Kragujevcu (Srbija). Zahtevi za ventilacijom Metode 1 se zasnivaju na podacima o prisustvu ljudi. Iz tog razloga, analiziran je i efekat različitih rasporeda prisustva ljudi, rasporeda stvarnog, prosečno godišnjeg i maksimalnog prisustva ljudi, na predviđanje energetskog ponašanja odabrane zgrade. Metodu 3 karakteriše stalna vrednost protoka svežeg vazduha, određena prema zapremini prostorije koja se ventiliše (0,5 ach). Dobijeni rezultati simulacija ukazuju da kod Metode 1 potrošnja toplotne energije raste sa povećanjem protoka svežeg vazduha ili broja ljudi u zgradi. Suprotno tome, pri stalnoj količini svežeg vazduha (Metoda 3) potrošnja toplotne energije se smanjuje sa povećanjem broja ljudi. Pokazano je da upotreba rasporeda maksimalnog prisustva dece daje najveću grešku u predviđanju potrošnje toplotne energije (do 11,38%), nezavisno od metode ventilacije. Za raspored prosečnog godišnjeg prisustva ljudi greška se kreće do 3,90%. Na osnovu prikazanih rezultata, u cilju približavanja predviđenog energetskog ponašanja zgrade njenom stvarnom ponašanju preporučuje se upotreba rasporeda stvarnog prisustva ljudi. Raspored maksimalnog prisustva ljudi, u svakom slučaju treba izbegavati.
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Reference
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