dc.contributor.author | Vereide, Kaspar | |
dc.contributor.author | Tekle, Torbjørn | |
dc.contributor.author | Nielsen, Torbjørn Kristian | |
dc.date.accessioned | 2018-01-03T11:49:42Z | |
dc.date.available | 2018-01-03T11:49:42Z | |
dc.date.created | 2015-06-02T09:31:44Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | Journal of Hydraulic Engineering. 2015, 141 (6), . | nb_NO |
dc.identifier.issn | 0733-9429 | |
dc.identifier.uri | http://hdl.handle.net/11250/2474332 | |
dc.description.abstract | A numerical model of a hydraulic system with a closed surge tank is developed for evaluating the thermodynamic behavior during slow transients in the air pocket. The numerical model is used to evaluate the polytrophic equation against a Modified Rational Heat Transfer (MRHT) method, and the results are compared to field observations. The original RHT method considers heat transfer to walls and water as a lumped quantity, and the method is modified in this work to evaluate these two processes separately. The field observation dataset contains pressure and water level measurements from a 3,050 m33,050 m3 closed surge tank during a pressure increase from 805 to 1543 kPa over 40 min, thus providing a unique opportunity to investigate the thermodynamic behavior during slow transients. This paper will show how the accuracy of modeling slow transient events in a closed surge tank may be improved by applying the MRHT method, which accounts for heat transfer to enclosing media. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | American Society of Civil Engineers | nb_NO |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Thermodynamic Behaviour and Heat Transfer in Closed Surge Tanks for Hydropower Plants | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | publishedVersion | nb_NO |
dc.source.pagenumber | 5 | nb_NO |
dc.source.volume | 141 | nb_NO |
dc.source.journal | Journal of Hydraulic Engineering | nb_NO |
dc.source.issue | 6 | nb_NO |
dc.identifier.doi | 10.1061/(ASCE)HY.1943-7900.0000995 | |
dc.identifier.cristin | 1245783 | |
dc.relation.project | Norges forskningsråd: 193818 | nb_NO |
dc.description.localcode | This work is made available under the terms of the Creative Commons Attribution 4.0 International license, http://creativecommons.org/licenses/by/4.0/. | nb_NO |
cristin.unitcode | 194,64,91,0 | |
cristin.unitcode | 194,64,25,0 | |
cristin.unitname | Institutt for bygg- og miljøteknikk | |
cristin.unitname | Institutt for energi- og prosessteknikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |