Browsing NTNU Open by Author "Rekstad, Inge Håvard"
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Accurate measurements of CO2 rich mixture phase equilibria relevant for CCS transport and conditioning
Stang, Hans Georg Jacob; Løvseth, Sigurd Weidemann; Størset, Sigmund Østtveit; Malvik, Bjarne; Rekstad, Inge Håvard (Journal article; Peer reviewed, 2013)This paper describes the experimental rig that has been constructed for the measurements of phase equilibrium of CO2-rich mixtures under relevant conditions for CCS transport and conditioning. The rig is believed to have ... -
Accurate phase equilibrium measurements of CO2 mixtures
Westman, Snorre Foss; Stang, Hans Georg Jacob; Størset, Sigmund Østtveit; Rekstad, Inge Håvard; Austegard, Anders; Løvseth, Sigurd Weidemann (Journal article; Peer reviewed, 2014)A new setup for accurate measurement of phase behavior of CO2-rich mixtures relevant for CCS has been designed, covering a range between - 60 and 150 °C in temperature and 0.4 and 20 MPa in pressure. In order to design ... -
Design and measurement of a CO2 refrigeration system with integrated propane subcooler at high air temperature operations
Bertelsen, Synne Kathinka; Haugsdal, Stine Børslid (Master thesis, 2015)After the rediscovery of CO2 as a prominent, environmentally benign working fluid, several technological modifications for the basic CO2 refrigeration cycle has been reviewed. These have been presented as solutions to the ... -
Development of new heat pump cloth drum dryer with CO2 as working fluid
Elnan, Åsmund (Master thesis, 2011)Since early the early 20th century the electrical tumble dryer became an appliance to dry clothes. During many years of improvements different configurations to solve issues on decreased drying time and more energy efficient ... -
Model-based sizing of a CO2 heat pump for residential use
Li, Yantong; Nord, Natasa; Halvorsen, Henrik; Rekstad, Inge Håvard (Peer reviewed; Journal article, 2022)CO2 heat pumps have advantages of reducing ozone layer damage and offering high-temperature hot water in comparison with traditional heat pumps. However, sizing of CO2 heat pump components that guarantees reliable performance ... -
Study of a water-source CO2 heat pump for residential use: experimental discharge pressure control and performance analysis
Li, Yantong; Nord, Natasa; Rekstad, Inge Håvard; Skånøy, Stein Kristian; Sørensen, Lars Konrad (Peer reviewed; Journal article, 2021)The heat pumps with the refrigerant of carbon dioxide (CO2), i.e., CO2 heat pumps, have the merits of low price and environmentally friendliness in comparison with those with traditional refrigerants, e.g., hydrochlorofl ...