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master's thesis
Modeliranje procesa sušenja u postupku proizvodnje mjernih transformatora
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. urn:nbn:hr:235:533962
Borovnik, Nikola
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

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Borovnik, N. (2020). Modeliranje procesa sušenja u postupku proizvodnje mjernih transformatora (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:533962

Borovnik, Nikola. "Modeliranje procesa sušenja u postupku proizvodnje mjernih transformatora." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:533962

Borovnik, Nikola. "Modeliranje procesa sušenja u postupku proizvodnje mjernih transformatora." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:533962

Borovnik, N. (2020). 'Modeliranje procesa sušenja u postupku proizvodnje mjernih transformatora', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 20 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:533962

Borovnik N. Modeliranje procesa sušenja u postupku proizvodnje mjernih transformatora [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2020 [cited 2024 December 20] Available at: https://urn.nsk.hr/urn:nbn:hr:235:533962

N. Borovnik, "Modeliranje procesa sušenja u postupku proizvodnje mjernih transformatora", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:235:533962

Metadata
TitleModeliranje procesa sušenja u postupku proizvodnje mjernih transformatora
Title (english)Modeling of the drying process in the production process of instrument transformers
AuthorNikola Borovnik
MentorSaša Mudrinić (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2020-12-04, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Process Energy Engineering
Abstract
Vlaga u izolaciji transformatora povećava rizik od prijevremenog kvara koji bi kao takav mogao ugroziti sigurnost osoblja ili u najmanju ruku uzrokovati značajne ekonomske gubitke. Najveći dio vlage u transformatoru je sadržan u krutoj izolaciji koja se uglavnom izrađuje od izrazito higroskopnih materijala na bazi celuloze, kao što je izolacijski papir za transformatore. Kako bi se prije puštanja u rad postigao što niži sadržaj vlage u izolaciji, transformator se podvrgava temeljitom procesu vakuumskog sušenja čije se trajanje često temelji na empiriji. Egzaktnija procjena sadržaja vlage tijekom sušenja bi u tom slučaju bila prvi korak ka optimizaciji procesa što bi na koncu rezultiralo značajnim uštedama u pogledu energije i financijskih sredstava. U tu je svrhu, kao glavni cilj ovog rada, razvijen matematički model koji obuhvaća simultani prijenos vlage i topline. Kako bi se dobila rješenja u obliku vremenski promjenjivih polja temperature i sadržaja vlage, korištena je numerička metoda konačnih diferencija. Na kraju je provedena analiza odziva modela s obzirom na različite slučajeve vremenski promjenjivih rubnih uvjeta.
Abstract (english)
Moisture in transformer insulation system increases the risk of premature failure which could endanger the safety of personnel or at the very least cause serious economic losses. Most of the moisture in transformer is contained in the solid insulation usually made from highly hygroscopic, cellulose-based materials such as transformer insulation paper. In order to achieve as low as possible moisture content of insulation, before being put into service, transformer is subjected to a thorough vacuum drying process, duration of which is oftentimes determined empirically. In that case, more exact assessment of moisture content during the process of drying would be the first step leading to optimization which would eventually result in significant savings in terms of both energy and financial assets. For this purpose and as a main objective of this thesis, simultaneous heat and mass transfer model was formulated. In order to get the solutions in the form of transient fields of temperature and moisture content, numerical finite difference method was used. Finally, analysis of mathematical model response to different cases of time-varying boundary conditions was carried out.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:533962
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution 4.0 International (CC BY 4.0) icon
Created on2020-12-02 12:40:19