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Vpliv površine in materiala grelnika na kritično gostoto toplotnega toka pri mehurčkastem vrenju
Puc, Janez (Author), Golobič, Iztok (Mentor) More about this mentor... This link opens in a new window

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Abstract
V diplomskem delu smo analizirali vpliv površine cirkonijevega grelnika na kritično gostoto toplotnega toka pri mehurčkastem vrenju dielektričnega fluida FC-72. Uporabili smo cirkonijeve grelnike, ki so bili neobdelani ali lasersko obdelani. Pri osnovni površini smo dosegli kritično gostoto toplotnega toka v območju od 143,4 kW/m2 do 149,5 kW/m2, pri lasersko obdelanih površinah pa v območju med 140,9 kW/m2 do 173,5 kW/m2. Analizirali smo tudi vpliv višine horizontalno postavljenega grelnega cirkonijevega traku, ki je bil vertikalno orientiran na kritično gostoto toplotnega toka pri mehurčkastem vrenju FC-72.

Language:Slovenian
Keywords:kritična gostota toplotnega toka, mehurčkasto vrenje, nasičeno vrenje, cirkonij, laserska obdelava.
Work type:Bachelor thesis/paper (mb11)
Tipology:2.11 - Undergraduate Thesis
Organization:FS - Faculty of Mechanical Engineering
Year:2018
Publisher:[J. Puc]
UDC:536.24(043.2)
COBISS.SI-ID:16409883 Link is opened in a new window
Views:451
Downloads:288
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Secondary language

Language:English
Title:The influence of the surface and the material of the heater on the pool boiling critical heat flux
Abstract:
In the present work, the influence of the surface and the material of the heater on the pool boiling critical heat flux is investigated using dielectric fluid FC-72 as the working fluid. Zirconium heaters in form of thin strips were utilized; the surfaces of the heaters were either untreated or laser treated. Additionally, the influence of the heater strip height on the critical heat flux was analyzed. Critical heat flux of up to 149,5 kW/m2 was reached on the untreated surface, whereas laser treatment of the surface increased the critical heat flux values with the latter reaching up to 173,5 kW/m2. It was also determined that critical heat flux deceases with increasing heater strip height.

Keywords:critical heat flux, nucleate boiling, saturated boiling, zirconium, laser machining.

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