Numerička analiza uticaja osnovnih radnih parametara na karakteristike ejektorskog solarnog hlađenja

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Branislav Petrović Milan Gojak Đorđe Kozić

Apstrakt

Razvoj ejektorskih solarnih sistema hlađenja, sve više zaokupira pažnju istraživača, pre sve kao primer korišćenja obnovljivog izvora energije. Apsorpcioni i adsorpcioni rashladni sistemi imaju velike investiocione troškove, dok su sistemi sa ejektorom zbog nepostojanja pokretnih delova, znatno pouzdaniji. Osim toga, ejektorsko hlađenje ima niz prednosti usled niske cene, jednostavne konstrukcije, pouzdanog rada, dugog veka trajanja i gotovo nikakvog održavanja. Jedina slabost ovog sistema je mala efikasnost i netolerancija na odstupanje od radnih uslova. U radu je razvijen matematički model sa algoritmom, koji se oslanja na zakone termodinamike, kao i na zakone održanja mase i impulsa. Na osnovu dobijenog modela, za dva radna fluida R134a i R290, prikazan je uticaj tempera-ture na osnovne parametre sistema i to u opsegu temnperatura radnog fluida u generatoru (80-100 °C), isparicaču (5-15 °C) i kondenzatoru (33-40 °C). Kao glavni pokazatelji se ističu: odnos karakterisitčnih površina Ar (kao geometrijski parametar ejektora), koeficijent usisavanja ejektora, efikasnost ejektora i COP. Pokazuje se da geometrija ejektora, kao i vrsta radnog fluida imaju značajan uticaj na performanse ejektorskog rashladnog sistema.

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Kako citirati
PETROVIĆ, Branislav; GOJAK, Milan; KOZIĆ, Đorđe. Numerička analiza uticaja osnovnih radnih parametara na karakteristike ejektorskog solarnog hlađenja. Zbornik Međunarodnog kongresa o KGH, [S.l.], v. 51, n. 1, p. 129-137, dec. 2020. Dostupno na: <https://izdanja.smeits.rs/index.php/kghk/article/view/6180>. Datum pristupa: 07 may 2021 doi: https://doi.org/10.24094/kghk.020.51.1.129.
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Reference

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