Eksperimentalna in numerična analiza cevno-ploščnega uparjalnika

Tomažič, Nina (author), Poredoš, Alojz (mentor)

Opisana je izvedba eksperimenta testiranja cevno-ploščnega uparjalnika, po katerem je bila zasnovana in izvedena numerična analiza s programsko opremo ANSYS Fluent. Rezultati temperaturnega polja s površine uparjalnika, posnetega z IR kamero ter rezultati post-procesiranja numeričnega preračuna, se po pričakovanjih razlikujejo predvsem zaradi potrebne prilagoditve geometrije numeričnega modela in zaradi nepopolnega kontakta med deli uparjalnika. Anomalije v rezultatih eksperimentalnega dela kažejo na razlike med kontakti folije, cevi in plošče uparjalnika. Temperaturna razlika medija med vstopom in izstopom iz uparjalnika je primerljiva po obeh metodah. Analiza s predstavljenim numeričnim modelom je primerna za nadaljnje raziskave pri izdelavi konstrukcijsko podobnih prenosnikih toplote.

• Language: Slovenian
• Keywords: cevno-ploščni uparjalnik, naravna konvekcija, brezdimenzijska števila prenosa toplote, IR kamera, računalniška dinamika tekočin, zakoni ohranitve
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [N. Tomažič]
• Year: 2018
• Number of pages: XXII, 54 str.
• PID: 20.500.12556/RUL-101705
• UDC: 004.942:519.876.5:536.24(043.2)
• COBISS.SI-ID: 16133915
• Publication date in RUL: 29.06.2018

TOMAŽIČ, Nina, 2018, Eksperimentalna in numerična analiza cevno-ploščnega uparjalnika [online]. Master’s thesis. Ljubljana : N. Tomažič. [Accessed 13 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=101705

Secondary language

• Language: English
• Title: An experimental and numerical analysis of plate-tube evaporator

Abstract

The process of carrying out an experiment of testing the plate-tube evaporator, on which a numeric analysis with the ANSYS Fluent software was based on, is described. As expected, the results of the temperature field from the surface of the evaporator taken with an IR camera, and the results of the post-processing numeric recalcultation differ, mostly due to the numerical model geometry adjustment requirement and the presence of imperfect fit of the evaporator's components. The anomalies in the experimental results point to the irregularities between the contacts of the foil, tube and the plate of the evaporator. The temperature difference between entering and exiting the evaporator is comparable using both methods. Presented numerical model analysis is suitable for further research in producing heat exchangers with a similar construction.

• Keywords: plate-tube evaporator, natural convection, dimensionless numbers of heat transfer, IR camera, computer fluid dynamcs, conservation law