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Merjenje hitrosti toka v ventilatorju hladilnika
Malenšek, Matej (Author), Hočevar, Marko (Mentor) More about this mentor... This link opens in a new window

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Abstract
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.

Language:Slovenian
Keywords:hladilnik tehnologija odmrzovanja prostorninski pretok anemometrija radialni ventilator delovna točka ventilatorja
Work type:Master's thesis/paper (mb22)
Organization:FS - Faculty of Mechanical Engineering
Year:2017
Views:743
Downloads:500
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Secondary language

Language:English
Title:Measuring of the flow velocity in a refrigerator fan
Abstract:
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.

Keywords:refrigerator no-frost technology volume flow anemometry radial fan the fan operating point

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