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dc.contributor.authorBengsch, Jan
dc.contributor.authorHazarika, Mihir Mouchum
dc.contributor.authorHafner, Armin
dc.contributor.authorWidell, Kristina Marianne Norne
dc.date.accessioned2024-06-19T10:27:48Z
dc.date.available2024-06-19T10:27:48Z
dc.date.created2023-10-25T15:07:56Z
dc.date.issued2023
dc.identifier.citationProceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023 - volume 4en_US
dc.identifier.isbn978-2-36215-058-6
dc.identifier.urihttps://hdl.handle.net/11250/3134678
dc.description.abstractThis study was carried out to investigate the performance of a transcritical CO2 heat pump chiller that provides heating and cooling simultaneously. There are several applications where such CO2 systems are implemented, i.e., hotels, commercial kitchens, fishing vessels, etc. Depending on the type of applications, these systems can be designed to achieve the desired hot and cold fluid temperature on the secondary side. The system investigated in the present study is utilized to produce hot water (up to 90°C) and chilled water (4°C). The evaporator utilized for chilled water production is a novel two-stage evaporator. The first stage of this evaporator operates on gravity-fed mode while the second stage operates on ejector-supported mode. The secondary loop is internally connected within the plate heat exchanger. This evaporator configuration gives the possibility to achieve a higher temperature gradient on the secondary fluid side. To analyze the performance of this proposed CO2 system with the two-stage evaporator, a simulation model was developed in Modelica. Using this model, simulations were carried out to analyze the performance of the system under different operating conditions. Results show that the integration of the two-stage evaporator enhances the overall performance by over 5 % as the cooling capacity is shared equally between the two stages and the suction pressure of the compressor is elevated by utilizing the ejector.en_US
dc.description.abstractInvestigation and analysis of a CO2 heat pump chiller with novel two-stage evaporatoren_US
dc.language.isoengen_US
dc.publisherInternational Institute of Refrigeration.en_US
dc.relation.ispartofProceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023 - volume 4
dc.titleInvestigation and analysis of a CO2 heat pump chiller with novel two-stage evaporatoren_US
dc.title.alternativeInvestigation and analysis of a CO2 heat pump chiller with novel two-stage evaporatoren_US
dc.typeChapteren_US
dc.description.versionacceptedVersionen_US
dc.source.pagenumber938-949en_US
dc.identifier.doi10.18462/iir.icr.2023.0352
dc.identifier.cristin2188481
dc.relation.projectNorges forskningsråd: 294662en_US
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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