Karakteristike R718 termičkih sistema i mogućnosti primene u rashladnim mašinama / toplinskim pumpama za klimatizaciju zgrada

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Aleksandar Gjerasimovski Maja Sharevska Natasha Gjerasimovska Monika Sharevska Milan Šarevski

Apstrakt

Propisi za ukidanje CFC-a i HCFC-a rashladnih fluida, za redukciju HFC-a i HFE-a i obnavljanje interesa za prirodnim rashladnim fluidima su razmatrane u ovom radu. Analizirani su termodinamička svojstva vode (R718) i objašnjene su prednosti primene i izazovi uprimeni R718 sistema. Radni uslovi dubokog vakuuma i mali specifični volumetrijski kapacitet hlađenja R718 su osobine koje izazivaju velike i izuzetno velike vrednosti zapreminskog protoka za temperaturni opseg primene u klimatizacijske rashladne mašine / toplinske pumpe. Potrebni stepen kompresije za određeno podizanje temperature sa isparavanjem na kondenzaciju je visok. Visoka vrednost izentropskog eksponenta uzrokuje visoku temperaturu na potisu kompresora. Analizirani su specifičnosti R718 turbo kompresora uzrokovane tim razlozima i procenjen je opseg optimalne primene R718 sistema u rashladnim mašinama / toplotnskim pumpama.

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Kako citirati
GJERASIMOVSKI, Aleksandar et al. Karakteristike R718 termičkih sistema i mogućnosti primene u rashladnim mašinama / toplinskim pumpama za klimatizaciju zgrada. Zbornik Međunarodnog kongresa o KGH, [S.l.], v. 51, n. 1, p. 37-44, dec. 2020. Dostupno na: <http://izdanja.smeits.rs/index.php/kghk/article/view/6163>. Datum pristupa: 21 apr. 2021 doi: https://doi.org/10.24094/kghk.020.51.1.37.
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