Blar i Institutt for energi og prosessteknikk på tidsskrift "Energies"
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Determination of zero dimensional, apparent devolatilization kinetics for biomass particles at suspension firing conditions
(Peer reviewed; Journal article, 2021)As part of the strive for a carbon neutral energy production, biomass combustion has been widely implemented in retrofitted coal burners. Modeling aids substantially in prediction of biomass flame behavior and thus in ... -
Dynamic modelling and validation of an air‐to‐water reversible R744 heat pump for high energy demand buildings
(Peer reviewed; Journal article, 2021)This paper presents a reversible heat pump based on CO2 as the refrigerant, able to provide heating, cooling, and domestic hot water to high energy demand buildings. The unit was developed and tested under the EU H2020 ... -
Dynamic Process Model Validation and Control of the Amine Plant at CO2 Technology Centre Mongstad
(Journal article; Peer reviewed, 2017)This paper presents a set of steady-state and transient data for dynamic process model validation of the chemical absorption process with monoethanolamine (MEA) for post-combustion CO2 capture of exhaust gas from a natural ... -
Economic and Energy Performance of Heating and Ventilation. Systems in Deep Retrofitted Norwegian Detached Houses
(Peer reviewed; Journal article, 2022)The aim of this study was to evaluate the life-cycle costs (LCC) and energy performance of different heating and ventilation systems (HVAC) in deep-energy renovation of Norwegian detached houses. Eight different HVAC ... -
Efficient Production of Clean Power and Hydrogen Through Synergistic Integration of Chemical Looping Combustion and Reforming
(Peer reviewed; Journal article, 2020)Chemical looping combustion (CLC) technology generates power while capturing CO2 inherently with no direct energy penalty. However, previous studies have shown significant energy penalties due to low turbine inlet temperature ... -
Electrodialytic Energy Storage System: Permselectivity, Stack Measurements and Life-Cycle Analysis
(Peer reviewed; Journal article, 2020)Reverse electrodialysis and electrodialysis can be combined into a closed energy storage system, allowing for storing surplus energy through a salinity difference between two solutions. A closed system benefits from simple ... -
Energy Pathways for Future Norwegian Residential Building Areas
(Peer reviewed; Journal article, 2021)Owing to stricter building energy requirements, future buildings will be characterized by low base loads and occasional high peaks. However, future building areas will still contain existing and historical buildings with ... -
Evaluation Method for the Hourly Average CO2eq. Intensity of the Electricity Mix and Its Application to the Demand Response of Residential Heating
(Journal article; Peer reviewed, 2019)This work introduces a generic methodology to determine the hourly average CO2eq. intensity of the electricity mix of a bidding zone. The proposed method is based on the logic of input–output models and avails the balance ... -
Evaluation of Integrated Concepts with CO2 for Heating, Cooling and Hot Water Production
(Journal article; Peer reviewed, 2021)The hotel sector is characterized by high thermal demands and a large carbon footprint, which greatly contributes to the global warming effect. Consequently, there is a need to investigate solutions that can reduce energy ... -
Experimental and Numerical Studies of a High-Head Francis Turbine: A Review of the Francis-99 Test Case
(Peer reviewed; Journal article, 2016)Hydraulic turbines are widely used to meet real-time electricity demands. Computational fluid dynamic (CFD) techniques have played an important role in the design and development of such turbines. The simulation of a ... -
Experimental Investigation of a Low-Temperature Three-Circuit Cooling System for an Electric Motor under Varying Loads
(Peer reviewed; Journal article, 2023)This study investigates a low-temperature three-circuit cooling system for a 55 kW industrial electric motor. The cooling system provides an increase of the power-to-dimension ratio by 63%, together with an improvement in ... -
Experimental investigation on NOx reduction by primary measures in biomass combustion: straw, peat, sewage sludge, forest residues and wood pellets
(Journal article; Peer reviewed, 2012)An experimental investigation was carried out to study the NOx formation and reduction by primary measures for five types of biomass (straw, peat, sewage sludge, forest residues/Grot, and wood pellets) and their mixtures. ... -
Heat Storage for Cooking: A Discussion on Requirements and Concepts
(Peer reviewed; Journal article, 2023)Methodologies for direct and indirect solar energy for cooking are discussed. Clean and renewable energy solutions for cooking are, in particular, in demand in the sub-Saharan region where fuel wood is the main source of ... -
Heat to H2: Using Waste Heat for Hydrogen Production through Reverse Electrodialysis
(Journal article; Peer reviewed, 2019)This work presents an integrated hydrogen production system using reverse electrodialysis (RED) and waste heat, termed Heat to H2. The driving potential in RED is a concentration difference over alternating anion and cation ... -
Heat to Hydrogen by Reverse Electrodialysis—Using a Non-Equilibrium Thermodynamics Model to Evaluate Hydrogen Production Concepts Utilising Waste Heat
(Peer reviewed; Journal article, 2022)The reverse electrodialysis heat engine (REDHE) is a promising salinity gradient energy technology, capable of producing hydrogen with an input of waste heat at temperatures below 100 °C. A salinity gradient drives water ... -
Hysteresis characteristic in the hump region of a pump-turbine model
(Peer reviewed; Journal article, 2016)The hump feature is one of the major instabilities in pump-turbines. When pump-turbines operate in the hump region, strong noise and serious fluctuations can be observed, which are harmful to their safe and stable operation ... -
The Impact of Process Heat on the Decarbonisation Potential of Offshore Installations by Hybrid Energy Systems
(Peer reviewed; Journal article, 2021)An opportunity to decarbonise the offshore oil and gas sector lies in the integration of renewable energy sources with energy storage in a hybrid energy system (HES). Such concept enables maximising the exploitation of ... -
The implementation of multiple linear regression for swimming pool facilities: Case study at Jøa, Norway
(Peer reviewed; Journal article, 2021)This paper presents a statistical model for predicting the time-averaged total power consumption of an indoor swimming facility. The model can be a powerful tool for continuous supervision of the facility’s energy performance ... -
The Importance of Optical Fibres for Internal Temperature Sensing in Lithium-ion Batteries during Operation
(Journal article; Peer reviewed, 2021) -
Investigation and validation of a Francis turbine at runaway operating conditions
(Journal article; Peer reviewed, 2016)Hydraulic turbines exhibit total load rejection during operation because of high fluctuations in the grid parameters. The generator reaches no-load instantly. Consequently, the turbine runner accelerates to high speed, ...