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Thermodynamics of the carbon dioxide plus argon (CO2+ Ar) system: An improved reference mixture model and measurements of vapor-liquid, vapor-solid, liquid-solid and vapor-liquid-solid phase equilibrium data at the temperatures 213–299 K and pressures up to 16 MPa
(Journal article; Peer reviewed, 2018)Phase equilibrium behavior of the carbon dioxide and argon system has been investigated at the temperatures 213, 223, 243, 263, 273, 283, and 299 K. The full vapor-liquid equilibria phase envelope has been measured at all ... -
Annual Summary Report on coordination and alignment activities (Y2)
(Research report, 2018) -
Elemental composition and phosphorus availability in hydrochars from seaweed and organic waste digestate
(Journal article; Peer reviewed, 2018)By hydrothermal liquefaction (HTL) of organic matter, hydrochars are produced which may be applied to soil for carbon sequestration. From substrates of wild seaweed and organic waste digestate, we measured the distribution ... -
Economically Efficient Design of Market for System Services under the Web-of-Cells Architecture
(Journal article; Peer reviewed, 2018)Significant power sector developments beyond 2020 will require changing our approach towards electricity balancing paradigms and architectures. Presently, new electricity balancing concepts are being developed. Implementation ... -
Crossing CO2 equator with the aid of multi-ejector concept: A comprehensive energy and environmental comparative study
(Journal article; Peer reviewed, 2018)The ever-stricter regulations put into effect worldwide to significantly decrease the considerable carbon footprint of commercial refrigeration sector have forced the transition to eco-friendlier working fluids (e.g. CO2, ... -
Direct CO2-ground condensers
(Science et technique du froid;2018-3, Chapter; Peer reviewed, 2018) -
The R744 multi-ejector hybrid CFD and experimentally-based reduced-order model
(Science et technique du froid;2018-3, Chapter; Peer reviewed, 2018) -
Market Power in Hydro-Thermal Systems with Marginal Cost Bidding
(International Conference on the European Energy Market;, Peer reviewed; Chapter, 2018)Traditionally, electricity markets have been designed with the intention of disabling producer side market power or prohibiting exercising it. Nonetheless it can be assumed that players participating in pool markets and ... -
Performance investigation of a multi-ejector R744 heat pump
(Journal article; Peer reviewed, 2018) -
Energy efficient design of membrane processes by use of entropy production minimization
(Journal article; Peer reviewed, 2018) -
Vapor-liquid equilibrium data for the carbon dioxide and carbon monoxide (CO2 + CO) system at the temperatures 253, 273, 283 and 298 K and pressures up to 13 MPawq32e
(Journal article; Peer reviewed, 2018)Vapor-liquid equilibrium measurements for the binary system CO2 + CO are reported at 253, 273, 283 and 298 K, with estimated standard uncertainties of maximum 9 mK in temperature, maximum 3 kPa in pressure, and maximum ... -
Two-stage high temperature hybrid heat pump with parallel heat sinks
(Science et technique du froid;2018-3, Chapter; Peer reviewed, 2018) -
Three-dimensional Linear Eddy Modeling of a Turbulent Lifted Hydrogen Jet Flame in a Vitiated Co-flow
(Journal article; Peer reviewed, 2018)A new methodology for modeling and simulation of reactive flows is reported in which a 3D formulation of the Linear Eddy Model (LEM3D) is used as a post-processing tool for an initial RANS simulation. In this hybrid approach, ... -
AC Corrosion Tests on Materials for Electrically Heated Flowlines
(ISOPE - International Offshore and Polar Engineering Conference. Proceedings;2018, Chapter; Peer reviewed, 2018) -
A Damping Factor-Based White-Box Transformer Model for Network Studies
(Journal article; Peer reviewed, 2018)Transformer manufacturers make routine use of white-box detailed transformer models for ensuring that the transformer will pass the lightning impulse test. For use in general simulation studies, the model should additionally ... -
Mitigating Turbine Mechanical Loads Using Engineering Model Predictive Wind Farm Controller
(Journal article; Peer reviewed, 2018)Cumulative O&M costs of offshore wind farms can amount to 38% of lifetime costs. In wind farms, upstream turbine wakes can result in up to 80% higher fatigue loads at downstream wind turbines. The present work therefore ... -
Analysis of MMC Dynamics in DQZ Coordinates for Vertical and Horizontal Energy Balancing Control
(Chapter; Peer reviewed, 2018)This paper presents a control system implementation in dqz-coordinates for equalizing the average energies stored in each arm of a Modular Multilevel Converter (MMC); a control objective that is typically referred to as ... -
Probabilistic socio-economic cost assessment integrating power market and reliability analysis
(Chapter; Peer reviewed, 2018)Abstract: Moving from deterministic to probabilistic reliability criteria for power systems necessitates probabilistic methods for socio-economic impact assessment. This paper demonstrates a probabilistic assessment of the ... -
Development of a qualitative framework for analysing high-impact low-probability events in power systems
(Chapter; Peer reviewed, 2018)High-Impact Low-Probability (HILP) events in power systems historically involve a multitude of aspects, including diverse and disparate threats, failures and sequences of events. Each of these aspects are associated with ... -
Challenges and potentials for low-temperature district heating implementation in Norway
(Journal article; Peer reviewed, 2018)Current district heating (DH) systems with high temperatures are facing many challenges that may decrease its competitiveness. Some of the challenges are decreased heat demands due to energy efficient buildings and high ...