dc.contributor.author | Banasiak, Krzysztof | |
dc.contributor.author | Hafner, Armin | |
dc.contributor.author | Kriezi, Ekaterini E. | |
dc.contributor.author | Madsen, Kenneth B. | |
dc.contributor.author | Birkelund, Michael | |
dc.contributor.author | Fredslund, Kristian | |
dc.contributor.author | Olsson, Rickard | |
dc.date.accessioned | 2020-04-30T12:55:43Z | |
dc.date.available | 2020-04-30T12:55:43Z | |
dc.date.created | 2015-06-10T11:12:48Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | International journal of refrigeration. 2015, 57 265-276. | en_US |
dc.identifier.issn | 0140-7007 | |
dc.identifier.uri | https://hdl.handle.net/11250/2653075 | |
dc.description.abstract | A multi-ejector expansion pack, intended as a substitute for a standard high-pressure electronic expansion valve (HPV), was designed, manufactured and experimentally investigated. Four different ejector cartridges were sized to enable a discrete opening characteristic with a binary profile for a parallel-compression R744 system. The system is rated for 70 kW at a 35 °C gas cooler outlet temperature and a -3 °C evaporation temperature. High values of ejector efficiency, exceeding 0.3 over a broad operation range, were recorded for all four of the cartridges tested under vapour compression conditions. The applicability of the multi-ejector pack as a main flashing device was verified experimentally. Similar profiles of the discharge pressure control error were recorded for both alternative options: expansion purely in the HPV vs. HPV-assisted expansion in the multi-ejector pack. | en_US |
dc.language.iso | eng | en_US |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.subject | Multi-ejector | en_US |
dc.subject | Expansion work recovery | en_US |
dc.subject | R744 | en_US |
dc.subject | Discharge pressure control | en_US |
dc.title | Development and performance mapping of a multi-ejector expansion work recovery pack for R744 vapour compression units | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | acceptedVersion | en_US |
dc.source.pagenumber | 265-276 | en_US |
dc.source.volume | 57 | en_US |
dc.source.journal | International journal of refrigeration | en_US |
dc.identifier.doi | 10.1016/j.ijrefrig.2015.05.016 | |
dc.identifier.cristin | 1247299 | |
dc.relation.project | Norges forskningsråd: 244009 | en_US |
cristin.unitcode | 7548,70,0,0 | |
cristin.unitname | Termisk energi | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 2 | |