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dc.contributor.authorSantisteban Díaz, Agustín 
dc.contributor.authorDelgado San Román, Fernando 
dc.contributor.authorOrtiz Fernández, Alfredo 
dc.contributor.authorFernández Diego, Inmaculada 
dc.contributor.authorRenedo Estébanez, Carlos Javier 
dc.contributor.otherUniversidad de Cantabriaes_ES
dc.date.accessioned2017-05-17T07:29:13Z
dc.date.available2017-05-17T07:29:13Z
dc.date.issued2016-05
dc.identifier.issn2172-038X
dc.identifier.otherDPI2013- 43897-Pes_ES
dc.identifier.urihttp://hdl.handle.net/10902/10981
dc.description.abstractMineral oil is the usual coolant of the power Transformers. Nonetheless, the high risk of fire of this liquid due to its low ignition point and its scarce biodegradability has promoted the development of dielectrics alternative fluids with better physical-chemical properties. However, these new liquids have to be as good coolants as mineral oil in order to maintain the power transformer performance. This numerical study analyzes the coolant capacity of some of these new commercial liquids (a natural ester, a synthetic ester, and a silicone oil) by using the zig-zag cooling system of the low voltage winding of a real power transformer. Two types of thermal-fluid studies (parametric and time-dependent studies) have been made by using a 3D model of this system. The comparison of temperatures obtained from the parametric study (different inlet flow rates) allow us to say that the worst coolant is the silicone oil. Also, it can be say that a significant increase in the inlet flow rate produces mild drops of hot-spots temperatures and no modification in the initial temperature distribution. For the time-dependent study (25% of overload during 1 hour), the hot-spot temperature exceed the limits, which negatively affects the aging speed of the insulating paper and therefore the transformer lifetime.es_ES
dc.description.sponsorshipThe authors of this research wish to acknowledge to the Spanish Ministry of Science for the financial support to the National Research Project: Performance of the insulating systems in transformers: alternative dielectrics, thermalfluid modelling and post-mortem analysis (DPI2013-43897-P).es_ES
dc.format.extent6 p.es_ES
dc.language.isoenges_ES
dc.publisherThe European Association for the Development of Renewable Energies, Environment and Power Quality (EA4EPQ)es_ES
dc.rights© The European Association for the Development of Renewable Energies, Environment and Power Quality (EA4EPQ)es_ES
dc.sourceRenewable Energy & Power Quality Journal (RE&PQJ), 2016, 1(14), 397-402es_ES
dc.sourceInternational Conference on Renewable Energies and Power Quality (ICREPQ'16), Madrides_ES
dc.subject.otherPower transformeres_ES
dc.subject.otherZig-zag cooling systemes_ES
dc.subject.otherAlternative dielectric liquidses_ES
dc.subject.otherCoolant capacityes_ES
dc.subject.otherFEM simulationes_ES
dc.titleNumerical study of the cooling capacity of several alternative liquids in zig-zag cooling system of a power transformeres_ES
dc.typeinfo:eu-repo/semantics/conferenceObjectes_ES
dc.rights.accessRightsopenAccesses_ES
dc.identifier.DOI10.24084/repqj/14.342
dc.type.versionpublishedVersiones_ES


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