Power transformer thermal analysis by using an advanced coupled 3D heat transfer and fluid flow FEM model

Tsili, MA; Amoiralis, EI; Kladas, AG; Souflaris, AT

dc.contributor.author	Tsili, MA	en
dc.contributor.author	Amoiralis, EI	en
dc.contributor.author	Kladas, AG	en
dc.contributor.author	Souflaris, AT	en
dc.date.accessioned	2014-03-01T02:12:03Z
dc.date.available	2014-03-01T02:12:03Z
dc.date.issued	2012	en
dc.identifier.issn	12900729	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29993
dc.subject	Computational fluid dynamics	en
dc.subject	Finite element method	en
dc.subject	Power transformers	en
dc.subject	Thermal analysis	en
dc.subject.other	Active parts	en
dc.subject.other	Automated design	en
dc.subject.other	Computational effort	en
dc.subject.other	Convection coefficients	en
dc.subject.other	Cooling ducts	en
dc.subject.other	Core and windings	en
dc.subject.other	Coupled solution	en
dc.subject.other	FEM models	en
dc.subject.other	Finite Element	en
dc.subject.other	Heat sources	en
dc.subject.other	Heat transfer and fluid flow	en
dc.subject.other	Integrated tools	en
dc.subject.other	Model accuracy	en
dc.subject.other	Oil flow	en
dc.subject.other	Oil-immersed power transformers	en
dc.subject.other	Prior knowledge	en
dc.subject.other	Temperature gradient	en
dc.subject.other	Thermal distributions	en
dc.subject.other	Thermal Performance	en
dc.subject.other	Thermal simulations	en
dc.subject.other	Three-dimensional (3D) finite element models	en
dc.subject.other	Air	en
dc.subject.other	Computational fluid dynamics	en
dc.subject.other	Coupled circuits	en
dc.subject.other	Fiber optic sensors	en
dc.subject.other	Finite element method	en
dc.subject.other	Flow of fluids	en
dc.subject.other	Heat transfer	en
dc.subject.other	Mixed convection	en
dc.subject.other	Oil filled transformers	en
dc.subject.other	Tanks (containers)	en
dc.subject.other	Thermoanalysis	en
dc.subject.other	Three dimensional	en
dc.subject.other	Transformer windings	en
dc.subject.other	Winding	en
dc.subject.other	Power transformers	en
dc.title	Power transformer thermal analysis by using an advanced coupled 3D heat transfer and fluid flow FEM model	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ijthermalsci.2011.10.010	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijthermalsci.2011.10.010	en
heal.publicationDate	2012	en
heal.abstract	Thermal performance in oil-immersed power transformers is governed by the flow of oil, acting both as an electrical insulator and a medium for the transfer of heat generated in the core and windings toward the tank and the surrounding air. This paper presents the development of an advanced three-dimensional (3D) finite element model for the coupled solution of heat transfer and fluid flow equations governing transformer thermal performance. The main advantages of the proposed method are: (i) no need to predefine the convection coefficients at the interfaces between the active part/tank walls and the circulating oil, (ii) detailed representation of specific transformer parts that play an important role in the accurate representation of oil flow and heat dissipation (such as winding cooling ducts and corrugated tank panels) through an automated design process, enhancing the model accuracy with the least possible computational effort and (iii) accurate definition of the transformer heat sources (core and windings loss). The proposed methodology provides an integrated tool for thermal simulation, able to predict detailed thermal distribution in a specific transformer, without requiring prior knowledge of nodal temperature or temperature gradient values. © 2011 Elsevier Masson SAS. All rights reserved.	en
heal.journalName	International Journal of Thermal Sciences	en
dc.identifier.doi	10.1016/j.ijthermalsci.2011.10.010	en
dc.identifier.volume	53	en
dc.identifier.spage	188	en
dc.identifier.epage	201	en