Zamjena radne tvari R-404A s radnom tvari srednjeg utjecaja na globalno zatopljenje u rashladnom uređaju za potrebe hlađenja na temperature više od 0°C

Hajsok, Luka (2018) Zamjena radne tvari R-404A s radnom tvari srednjeg utjecaja na globalno zatopljenje u rashladnom uređaju za potrebe hlađenja na temperature više od 0°C. = Retrofiting of a R-404A condensing unit to a fluorinated medium GWP refrigerant for a medium temperature commercial application. Undergraduate thesis , Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, UNSPECIFIED. Mentor: Grozdek, Marino.

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Abstract (Croatian)

Danas se sve više teži odabiru radnih tvari koje imaju malen ili neznatan utjecaj na okoliš u obliku GWP broja, zbog uredbi o zabranama radnih tvari s povećanim utjecajem na okoliš. Te će uredbe na snagu nastupiti za nekoliko godina te je u ovom radu cilj istražiti komercijalno područje zamjenskih radnih tvari za R-404A. Radne tvari koje su odabrane kao zamjena su R- 407F i R-449A. Nakon odabira, provedena je i proračunska usporedba ovih radnih tvari da bi se dobio uvid u njihove prednosti i mane. Nakon usporedbe rezulata opisan je postupak zamjene radnih tvari.

Abstract

Nowadays, the focus is on choosing refrigerants with low GWP potential because of the regulations that forbid use of refrigerants which have high impact on the environment. These regulations will come into force soon, so here is the main goal to explore commerical alternatives for R-404A. Refrigerants that are chosen for retrofit are R-407F and R-449A. Also, the thermodynamic calculations and comparison with these refrigerants is presented so one can see refrigerant ́s advantages and disadvantages. After the comparison, the retrofit procedure is explained.

Item Type: Thesis (Undergraduate thesis)
Uncontrolled Keywords: R-404A; R-407A; R-449A; utjecaj na okoliš; proračunska usporedba; zamjena radne tvari
Keywords (Croatian): R-404A; R-407F; R-449A; environmental impact; calculation comparison refrigerant retrofit
Subjects: TECHNICAL SCIENCE > Mechanical Engineering > process energy engineering
Divisions: 300 Department of Thermodynamics, Thermal and Process Engineering > 320 Chair of Thermal and Process Engineering
Date Deposited: 23 Feb 2018 10:08
Last Modified: 06 Mar 2018 13:55
URI: http://repozitorij.fsb.hr/id/eprint/8431

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