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Modelling anti-icing of railway overhead catenary wires by resistive heating
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi.
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi.ORCID-id: 0000-0001-8153-2778
E2F, Plaza Benjamin Palencia 2-3,Entreplata 5, Albacete 02006, Spain..
E2F, Plaza Benjamin Palencia 2-3,Entreplata 5, Albacete 02006, Spain..
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2019 (Engelska)Ingår i: International Journal of Heat and Mass Transfer, ISSN 0017-9310, E-ISSN 1879-2189, Vol. 143, artikel-id 118505Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Aggregation of ice on electrical cables and apparatus can cause severe equipment malfunction and is thus considered as a serious problem, especially in arctic climate zones. In particular, cable damage caused by ice accumulation on railway catenary wires is in wintertime a common origin for delayed trains in the northern parts of Europe. This study examines how resistive heating can be used for preventing formation of ice on metallic, non-insulated electrical cables. The heat equation and the Navier Stokes equations were solved simultaneously with FEM in 3D in order to predict the cable temperature as function of external temperature, applied voltage, wind speed, wind direction, and heating time. An analytical expression for the heat transfer coefficient was derived from the FEM simulations and it was concluded that the influence of wind direction can typically be neglected. Experimental validation measurements were performed on Kanthal cables in a climate chamber, giving temperature increase results in good agreement with the simulation predictions. The resistive heating efficiency, i.e. the ratio between applied electrical energy and resulting thermal energy, was found to be approximately 68% in this particular study.

Ort, förlag, år, upplaga, sidor
PERGAMON-ELSEVIER SCIENCE LTD , 2019. Vol. 143, artikel-id 118505
Nyckelord [en]
Ice-prevention, Resistive heating, FEM, Kanthal, Railway overhead lines
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:kth:diva-261935DOI: 10.1016/j.ijheatmasstransfer.2019.118505ISI: 000487564400031Scopus ID: 2-s2.0-85070233997OAI: oai:DiVA.org:kth-261935DiVA, id: diva2:1361244
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QC 20191015

Tillgänglig från: 2019-10-15 Skapad: 2019-10-15 Senast uppdaterad: 2019-10-15Bibliografiskt granskad

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Nilsson, FritjofMoyassari, Ali

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