Browsing NTNU Open by Author "Løvseth, Sigurd Weidemann"
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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 ... -
Experimental Investigations of Impurity Impact on CO2 Mixture Phase Equilibria
Løvseth, Sigurd Weidemann; Stang, Hans Georg Jacob; Westman, Snorre Foss; Snustad, Ingrid; Austegard, Anders (Journal article; Peer reviewed, 2014)A facility designed for precise measurements of phase equilibria of CO2-rich mixtures relevant for CCS conditioning and transport is demonstrated. The setup aims for high accuracy in pressure, temperature, and composition ... -
Flow pattern transitions in and hysteresis effects of falling film flow over horizontal tubes related to LNG heat exchangers
Austegard, Anders; Bandopadhyay, Mayukh; Løvseth, Sigurd Weidemann; Brunsvold, Amy (Journal article; Peer reviewed, 2015)Spiral wound heat exchangers with horizontal tube configurations are used extensively in the chemical, refrigeration, petroleum and food industry, and are core components in many natural gas liquefaction plants. For improved ... -
Measurements of CO2-Rich Mixture Properties: Status and CCS Needs
Løvseth, Sigurd Weidemann; Stang, Hans Georg Jacob; Austegard, Anders; Westman, Snorre Foss; Span, Roland; Wegge, Robin (Journal article; Peer reviewed, 2016)In order to design and operate current and future CCS system and processes, accurate predictions of the behavior of the fluids involved is necessary. Currently, there are large knowledge gaps for fundamental properties ... -
A new facility for viscosity and density measurements for CO2 – rich mixtures relevant for CO2 transport and storage
Khosravi, Bahareh; Austegard, Anders; Stang, Hans Georg Jacob; Einen, Caroline; Jakobsen, Jana Poplsteinova; Snustad, Ingrid; Løvseth, Sigurd Weidemann (Journal article, 2022)For safe and cost-effective design, optimization, and operation of CO2 capture, transport, and storage (CCS) processes, accurate viscosity and density data of CO2-rich mixtures are required. Currently, there are large ... -
Single and Multiple Wavelength DFB Fiber Lasers
Løvseth, Sigurd Weidemann (Dr. ingeniøravhandling, 0809-103X; 2001:59, Doctoral thesis, 2001)Single mode and multiple mode distributed feedback fiber lasers (DFB-FLs) are analyzed and experimentally investigated, with emphasis on properties that have importance for sensor applications. It is experimentally found ... -
Thermodynamics of the carbon dioxide plus nitrogen plus methane (Co2 + N2 + Ch4) system: Measurements of vapor-liquid equilibrium data at temperatures from 223 to 298 K and verification of EOS-CG-2019 equation of state
Ottøy, Sindre; Neumann, Tobias; Stang, Hans Georg Jacob; Jakobsen, Jana Poplsteinova; Austegard, Anders; Løvseth, Sigurd Weidemann (Journal article; Peer reviewed, 2019)Vapor-liquid equilibria (VLE) data of the ternary mixture of CO2 + N2 + CH4 were measured at the isotherms 223 K, 253 K, 273 K, 283 K, and 298 K and for pressures in the range of 0.8 MPa–9.3 MPa. The 62 experimental dew ... -
Two-capillary viscometer for temperatures and pressures relevant to CO2 capture, transport, and storage—operation and improved analysis at high pressure
Khosravi, Bahareh; Austegard, Anders; Løvseth, Sigurd Weidemann; Stang, Hans Georg Jacob; Jakobsen, Jana Poplsteinova (Journal article; Peer reviewed, 2024)Two-capillary viscometer for temperatures and pressures relevant to CO2 capture, transport, and storage—operation and improved analysis at high pressure -
A two-capillary viscometer for temperatures up to 473 K and pressures up to 100 MPa—operation and verification at low pressure
Khosravi, Bahareh; Austegard, Anders; Løvseth, Sigurd Weidemann; Stang, Hans Georg Jacob; Jakobsen, Jana Poplsteinova (Journal article; Peer reviewed, 2024)In this paper, we described the design and construction of a new two-capillary viscometer with several novel technical solutions for viscosity and density measurements. Our design, which is based on the low-pressure ... -
Vapor-liquid equilibrium data for the carbon dioxide and nitrogen (CO2+N2) system at the temperatures 223, 270, 298 and 303 K and pressures up to 18 MPa
Westman, Snorre Foss; Stang, Hans Georg Jacob; Løvseth, Sigurd Weidemann; Austegard, Anders; Snustad, Ingrid; Størset, Sigmund Østtveit; Ertesvåg, Ivar Ståle (Journal article; Peer reviewed, 2015)A new setup for the measurement of vapor-liquid phase equilibria of CO2-rich mixtures relevant for carbon capture and storage (CCS) transport conditions is presented. An isothermal analytical method with a variable volume ... -
Vapor-liquid equilibrium data for the carbon dioxide and oxygen (CO2 + O2) system at the temperatures 218, 233, 253, 273, 288 and 298 K and pressures up to 14 MPa
Westman, Snorre Foss; Stang, Hans Georg Jacob; Løvseth, Sigurd Weidemann; Austegard, Anders; Snustad, Ingrid; Ertesvåg, Ivar Ståle (Journal article; Peer reviewed, 2016)Accurate thermophysical data for the CO2-rich mixtures relevant for carbon capture, transport and storage (CCS) are essential for the development of the accurate equations of state (EOS) and models needed for the design ... -
Viscosity measurements of CO<inf>2</inf>-rich; CO<inf>2</inf> + N<inf>2</inf> and CO<inf>2</inf> + H<inf>2</inf> mixtures in gas or supercritical phase at temperatures between 273 and 473 K and pressures up to 8.7 MPa
Khosravi, Bahareh; Bedken, Benjamin; Jakobsen, Jana Poplsteinova; Løvseth, Sigurd Weidemann; Span, Roland (Peer reviewed; Journal article, 2022)New experimental viscosity data of three binary CO2-rich mixtures with approximate mole fractions of 0.93 CO2 + 0.07 H2, 0.80 CO2 + 0.20 H2, and 0.90 CO2 + 0.10 N2 are reported. The measurements were performed at four ...