Browsing NTNU Open by Author "Austegard, Anders"
Now showing items 1-19 of 19
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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 ... -
Condensation heat transfer of CO2 on Cu based hierarchical and nanostructured surfaces
Snustad, Ingrid; Hollund, Lene; Ervik, Åsmund; Austegard, Anders; Brunsvold, Amy; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2021)Phase-change processes such as condensation are efficient means of heat transfer. However, condensation is also an energy-intensive process and extensive research is conducted to increase the heat transfer efficiency. ... -
Depressurization of in a pipe: Effect of initial state on non-equilibrium two-phase flow
Log, Alexandra Metallinou; Hammer, Morten; Deng, Han; Austegard, Anders; Hafner, Armin; Munkejord, Svend Tollak (Peer reviewed; Journal article, 2023)It is key in several industrial applications to accurately describe rapid depressurization of liquid and dense phase states. Examples include refrigeration systems, nuclear reactor cooling and capture and storage (CCS). ... -
Efficient Liquefaction of Carbon Dioxide on Superlyophobic Surfaces
Snustad, Ingrid; Ervik, Åsmund; Austegard, Anders; Reigstad, Gunhild Allard; He, Jianying; Zhang, Zhiliang; Brunsvold, Amy (Journal article, 2019)Liquefaction of CO2 is a necessary step in several parts of the carbon capture, transport and storage (CCS) chain, e.g. for processing for ship transport. By increasing the efficiency of condensation, a lower energy ... -
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 ... -
Experiments and modelling of choked flow of CO2 in orifices and nozzles
Hammer, Morten; Deng, Han; Austegard, Anders; Log, Alexandra Metallinou; Munkejord, Svend Tollak (Peer reviewed; Journal article, 2022)In order to accelerate the deployment of capture and storage (CCS), engineers need experimentally validated models, among other things, to predict the mass flow rate in process equipment and flow restrictions like valves, ... -
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 ... -
Heat transfer characteristics of CO2 condensation on common heat exchanger materials, method development and experimental results
Snustad, Ingrid; Ervik, Åsmund; Austegard, Anders; Brunsvold, Amy; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2021)Understanding condensation of CO2 is essential for e.g designing compact heat exchangers or processes involved in Carbon Capture and Storage. However, a consistent experimental campaign for condensation of CO2 on common ... -
Investigation of non-equilibrium effects during the depressurization of carbon dioxide
Log, Alexandra Metallinou; Munkejord, Svend Tollak; Hammer, Morten; Hafner, Armin; Deng, Han; Austegard, Anders (Chapter, 2022)Predicting the phase change of liquid CO2 during depressurization is highly relevant for the application in refrigeration units and for safety analysis in the context of CO2 capture and storage (CCS). For abrupt depressurization ... -
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 ... -
Measurements of the Viscosity of Hydrogen and a (Hydrogen + Methane) Mixture with a Two-Capillary Viscometer
Betken, Benjamin; Austegard, Anders; Finotti, Francesco; Caccamo, Chiara; Stang, Hans Georg Jacob; Khosravi, Bahareh; Span, Roland (Journal article; Peer reviewed, 2024)Measurements of the viscosity of pure hydrogen and a binary (hydrogen + methane) mixture with a nominal composition 90 mol % hydrogen are presented. The measurements were conducted with a two-capillary viscometer relative ... -
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 ... -
A new facility for viscosity measurements of CO2-rich mixtures at conditions relevant to CO2 capture, transport and storage
Khosravi, Bahareh (Doctoral theses at NTNU;2023:254, Doctoral thesis, 2023) -
Thermodynamic modeling with equations of state: present challenges with established methods
Wilhelmsen, Øivind; Aasen, Ailo; Skaugen, Geir; Aursand, Peder; Austegard, Anders; Aursand, Eskil; Gjennestad, Magnus Aashammer; Lund, Halvor; Linga, Gaute; Hammer, Morten (Journal article; Peer reviewed, 2017)Equations of state (EoS) are essential in the modeling of a wide range of industrial and natural processes. Desired qualities of EoS are accuracy, consistency, computational speed, robustness and predictive ability outside ... -
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 ...