Browsing SINTEF Open by Author "Kjelstrup, Signe"
Now showing items 1-14 of 14
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Efficiency in the process industry: Three thermodynamic tools for better resource use
Kjelstrup, Signe; Magnanelli, Elisa (Peer reviewed; Journal article, 2020)In a world where resources are limited and their use will necessary have an impact, efficient handling of resources becomes essential. This review concerns three thermodynamic tools that can be systematically used to ... -
Electrolyte Melt Compositions for Low Temperature Molten Carbonate Thermocell
Kandhasamy, Sathiyaraj; Solheim, Asbjørn; Kjelstrup, Signe; Haarberg, Geir Martin (Journal article, 2018)Industrial processes for the production of metals and alloys by metallurgical and electrochemical methods generate a great deal of waste heat due to irreversible losses. This waste heat may be used as a power source to ... -
Energy efficient design of membrane processes by use of entropy production minimization
Magnanelli, Elisa; Wilhelmsen, Øivind; Johannessen, Eivind; Kjelstrup, Signe (Journal article; Peer reviewed, 2018) -
Exergy-based performance indicators for industrial practice
Magnanelli, Elisa; Berglihn, Olaf Trygve; Kjelstrup, Signe (Peer reviewed; Journal article, 2018)Key performance indicators (KPIs) are powerful tools that industries can use not only to monitor their activities but also to highlight their unexploited potential. Energy-based KPIs are nowadays mostly used to evaluate ... -
Exploring the potential for waste heat recovery during metal casting With thermoelectric generators: On-site experiments and mathematical modelling
Børset, Marit Takla; Wilhelmsen, Øivind; Kjelstrup, Signe; Burheim, Odne Stokke (Journal article; Peer reviewed, 2016) -
Gas electrodes with nickel based current collectors for molten carbonate electrolyte thermo-electrochemical cells
Kandhasamy, Sathiyaraj; Haarberg, Geir Martin; Kjelstrup, Signe; Solheim, Asbjørn (Peer reviewed; Journal article, 2019)Thermo-electrochemical cells with inexpensive molten carbonate electrolyte and (CO2|O2) gas electrodes allow the possible conversion of high temperature waste heat from industrial processes into electricity. The cell ... -
Heat transport through a solid-solid junction: the interface as an autonomous thermodynamic system
Rurali, R.; Colombo, L.; Cartoixà, X.; Wilhelmsen, Øivind; Trinh, Thuat; Bedeaux, Dick; Kjelstrup, Signe (Journal article; Peer reviewed, 2016) -
Heat transport through a solid-solid junction: the interface as an autonomous thermodynamic system
Rurali, R.; Colombo, L.; Cartoixà, X.; Wilhelmsen, Øivind; Trinh, Thuat; Bedeaux, Dick; Kjelstrup, Signe (Journal article; Peer reviewed, 2016) -
Influence of Electrode Gas Flow Rate and Solid Oxide Ratio in Electrolyte on the Seebeck Coefficient of Molten Carbonate Thermocell
Kandhasamy, Sathiyaraj; Calandrino, Luca; Burheim, Odne Stokke; Solheim, Asbjørn; Kjelstrup, Signe; Haarberg, Geir Martin (Peer reviewed; Journal article, 2017) -
Minimum entropy production in a distillation column for air separation described by a continuous non-equilibrium model
Kingston, Diego; Wilhelmsen, Øivind; Kjelstrup, Signe (Journal article; Peer reviewed, 2020)In this work, we apply the rate-based model of Taylor and Krishna to describe the separation of air in a low-pressure, packed distillation column. By use of numerical optimization, we identify the temperature profile for ... -
Nonequilibrium thermodynamics of surfaces captures the energy conversions in a shock wave
Hafskjold, Bjørn; Bedeaux, Dick; Kjelstrup, Signe; Wilhelmsen, Øivind (Peer reviewed; Journal article, 2020)A theory for the entropy production in a shock wave was developed using Gibbs’ excess properties in the framework of non-equilibrium thermodynamics (NET) of surfaces. The theory was used to analyze numerical results from ... -
The Nasal Geometry of the Reindeer Gives Energy-Efficient Respiration
Magnanelli, Elisa; Wilhelmsen, Øivind; Acquarone, Mario; Folkow, Lars; Kjelstrup, Signe (Journal article; Peer reviewed, 2016)Reindeer in the arctic region live under very harsh conditions and may face temperatures below 233 K. Therefore, efficient conservation of body heat and water is important for their survival. Alongside their insulating ... -
The Permselectivity and Water Transference Number of Ion Exchange Membranes in Reverse Electrodialysis
Zlotorowicz, Agnieszka; Strand, Robin Viktor; Burheim, Odne Stokke; Wilhelmsen, Øivind; Kjelstrup, Signe (Journal article; Peer reviewed, 2016) -
Theory and simulation of shock waves: Entropy production and energy conversion
Hafskjold, Bjørn; Bedeaux, Dick; Kjelstrup, Signe; Wilhelmsen, Øivind (Peer reviewed; Journal article, 2021)We have considered a shock wave as a surface of discontinuity and computed the entropy production using nonequilibrium thermodynamics for surfaces. The results from this method, which we call the “Gibbs excess method” ...