20.500.12556/RUL-97576 Merjenje hitrosti toka v ventilatorju hladilnika Measuring of the flow velocity in a refrigerator fan V magistrskem delu smo naredili analizo hitrosti zračnega pretoka na vstopu v radialni ventilator, ki je nameščen v prostostoječi kombinirani hladilnik. Hladilnik deluje na podlagi tehnologije odmrzovanja, ventilator pa je ključni element za transport hladnega zraka znotraj naprave. Opisali smo teoretično ozadje delovanja hladilnih procesov in turbinskih strojev ter postopkov za merjenje hitrosti in tlaka. Podrobneje smo popisali zasnovo in delovanje merilne postaje, na katero je bil nameščen modul z ventilatorjem in uparjalnikom, ki je bil izoliran iz zamrzovalnika kombiniranega hladilnika. Na merilni postaji smo v merilnih točkah ob dveh nastavitvah zračne reže izvajali meritve hitrosti in tlaka na sesalni strani ventilatorja. Pridobljene rezultate smo analizirali, določili prostorninske pretoke ter na podlagi izmerjenih tlakov na karakteristiki določili delovno točko ventilatorja. Hitrostno polje na vstopu v ventilator smo prikazali tudi grafično. This master thesis deals with flow velocity analysis at the inlet of a radial fan, which is mounted inside a household refrigerator. The refrigerator is operating on a principle of no-frost technology, which prevents formation of ice on the evaporator; radial fan is the key element when it comes to cold air transportation inside of the refrigerator. The theoretical background provides information on cooling cycles, principles of turbomachinery and methods on measuring both air velocity and pressure. Furthermore, we have detailed the design and working principle of the experimental system, the module with a radial fan and an evaporator was fitted on. We were changing the size of the air gap between the inlet and the impeller and measured flow velocity and pressure at the suction side of the fan. We analyzed the results, calculated volume flows and on the basis of measured pressures, we determined the operating point of the fan on the fan characteristic. Graphically we showed the velocity field at the inlet of the radial fan. hladilnik tehnologija odmrzovanja prostorninski pretok anemometrija radialni ventilator delovna točka ventilatorja refrigerator no-frost technology volume flow anemometry radial fan the fan operating point true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2017-10-27 07:15:21 2017-10-27 07:15:23 2022-08-12 12:53:40 0000-00-00 00:00:00 2017 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 202143 1317.pdf 1317.pdf 1 74D673E096A4AD9C0E2FC15DA4870DD7 80d7ed41c6f1aa075ddaf738184769a620ce19c7cf8ecc4bd70ef34c7a43e177 37b49dbc-a1b4-11eb-a523-00155dcfd717 20.500.12556/rul/472cc110-d295-45da-ab5a-df762027b2f2 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=106617 Fakulteta za strojništvo 0 0 0