dc.contributor.author | Jin, Zhequan | |
dc.contributor.author | Eikevik, Trygve Magne | |
dc.contributor.author | Nekså, Petter | |
dc.contributor.author | Hafner, Armin | |
dc.date.accessioned | 2018-02-22T07:50:29Z | |
dc.date.available | 2018-02-22T07:50:29Z | |
dc.date.created | 2017-02-03T00:08:33Z | |
dc.date.issued | 2017 | |
dc.identifier.citation | International journal of refrigeration. 2017, 76 29-41. | nb_NO |
dc.identifier.issn | 0140-7007 | |
dc.identifier.uri | http://hdl.handle.net/11250/2486292 | |
dc.description.abstract | This article contains the steady and quasi-steady state analysis on a CO2 hybrid ground-coupled heat pumping system for warm climates. The hybrid system uses a combination of ambient air and ground boreholes as a heat sink for the cooling mode, while only the ground boreholes are used as a heat source in the heating mode. The steady state analysis suggests that the optimal control strategy of gas cooler pressure for a CO2 hybrid transcritical cycle is based on the optimal cooling COP value and the ratio of heat rejected to ambient air. This optimal control strategy is important for decreasing the annual ground thermal imbalance performance of ground boreholes. In addition, the quasi-steady state model of a CO2 hybrid ground-coupled heat pumping system is constructed for the hourly simulation with different boundary conditions. Simulation results show the details of the system operating characteristics both for heating and cooling mode and the COP values with different operating and design conditions are presented. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Elsevier | nb_NO |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.title | A steady and quasi-steady state analysis on the CO2 hybrid ground-coupled heat pumping system | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | acceptedVersion | nb_NO |
dc.source.pagenumber | 29-41 | nb_NO |
dc.source.volume | 76 | nb_NO |
dc.source.journal | International journal of refrigeration | nb_NO |
dc.identifier.doi | 10.1016/j.ijrefrig.2017.01.029 | |
dc.identifier.cristin | 1446407 | |
dc.description.localcode | © 2017. This is the authors’ accepted and refereed manuscript to the article. Locked until 1.2.2019 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | nb_NO |
cristin.unitcode | 194,64,25,0 | |
cristin.unitname | Institutt for energi- og prosessteknikk | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 2 | |