Merjenje pretoka različnih plinov z laminarnim merilnikom pretoka

Malgaj, Žan (author), Kutin, Jože (mentor), Bobovnik, Gregor (comentor)

Pomemben vplivni dejavnik pri merjenju pretoka z laminarnim merilnikom pretoka je tudi vrsta plina. V primeru uporabe merilnika z različnimi plini je umerjanje merilnika za vse pline lahko ekonomsko neugodno. V nalogi smo zato raziskali, ali je možno z enostavno računsko korekcijo dobiti ustrezne rezultate izmerjenega pretoka plina, ki je drugačen od tistega, za katerega je merilnik umerjen oz. nastavljen. Eksperimentalno smo z laminarnim merilnikom pretoka, nastavljenim za merjenje zraka, pomerili pretoke dušika in kisika. Iz pridobljenih izmerkov smo s korekcijskim modelom, ki upošteva razmerje viskoznosti dejanskega in referenčnega plina in temelji na Poiseuillovem zakonu, pridobili dovolj natančne rezultate, ki so nam pokazali, da je predlagana korekcija učinkovita.

• Language: Slovenian
• Keywords: laminarni merilnik pretoka, prostorninski tok, Poiseuillov zakon, eksperimentalna analiza, korekcija merilnih rezultatov
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [Ž. Malgaj]
• Year: 2019
• Number of pages: XIV, 21 f.
• PID: 20.500.12556/RUL-107329
• UDC: 532.57:544.27(043.2)
• COBISS.SI-ID: 16569883
• Publication date in RUL: 30.03.2019

MALGAJ, Žan, 2019, Merjenje pretoka različnih plinov z laminarnim merilnikom pretoka [online]. Bachelor’s thesis. Ljubljana : Ž. Malgaj] . [Accessed 26 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=107329

Secondary language

• Language: English
• Title: Flow measurements of different gases with a laminar flow meter

Abstract

When using a laminar flowmeter for measuring flow rate, the type of gas plays an important role. Calibration of the flow meter for each gas may be economically inconvenient when using a flowmeter for different gases. The aim of this work was to determine whether a simple computational correction could be used to obtain suitable flow rate results for a gas, which is different to the one the flowmeter was calibreted (set) for. Experimental results were obtained by measuring flow rates of nitrogen and oxygen using a laminar flowmeter calibrated for air. The correction that was applied to experimental measurements accounts for the ratio of viscosities of actual and reference gas and is based on Poiseuille Law, gave a sufficiently accurate results, demonstrating the appropriateness of the use of the proposed correction.

• Keywords: volumetric flow rate, laminar flow, Poiseuille law, flow meter, measurement correction