Browsing SINTEF Open by Author "Løvås, Terese"
Now showing items 1-20 of 20
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An evaluation of effects of fuel parameters and flue gas recirculation on NOx emissions through detailed chemical kinetics simulations
Skreiberg, Øyvind; Li, Tian; Wang, Liang; Bugge, Mette; Løvås, Terese (Journal article; Peer reviewed, 2019)In this work the effects of fuel parameters and under grate flue gas recirculation (FGR) are investigated when applying staged air combustion of solid fuel for the purpose of NOx reduction. In addition to temperatures, ... -
An SEM-EDX Study of Forest Residue Chars Produced at High Temperatures and High Heating Rate
Wang, Liang; Li, Tian; Matas, Berta Güell; Løvås, Terese; Sandquist, Judit (Journal article; Peer reviewed, 2015) -
Application of a Central Composite Design for the Study of NOx Emission Performance of a Low NOx Burner
Dutka, Marcin Damian; Ditaranto, Mario; Løvås, Terese (Journal article; Peer reviewed, 2015) -
CO2 Gasification of Chars Prepared by Fast and Slow Pyrolysis from Wood and Forest Residue. A Kinetic Study
Wang, Liang; Li, Tian; Várhegyi, Gábor; Skreiberg, Øyvind; Løvås, Terese (Journal article; Peer reviewed, 2017) -
Cold flow characteristics of a novel bluff body hydrogen burner
Meraner, Christoph; Li, Tian; Ditaranto, Mario; Løvås, Terese (Journal article; Peer reviewed, 2018)The cold flow characteristics of a novel partial premixed bluff body (PPBB) low NOx burner, capable of operating with hydrogen as well as methane-hydrogen blends, were investigated numerically. The PPBB burner features a ... -
Concept of hydrogen fired gas turbine cycle with exhaust gas recirculation: Assessment of combustion and emissions performance
Ditaranto, Mario; Li, Hailong; Løvås, Terese (Journal article; Peer reviewed, 2015) -
Correlation effects between turbulence and the conversion rate of pulverized char particles
Krüger, Jonas; Haugen, Nils Erland L; Løvås, Terese (Journal article; Peer reviewed, 2017)The effect of turbulence on heterogeneous reactions on the surface of char particles embedded in a turbulent oxidizer, consisting of oxygen and carbon-dioxide, is in this work studied numerically. It is shown that for a ... -
Curvature effects on NO formation in wrinkled laminar ammonia/hydrogen/nitrogen-air premixed flames
Netzer, Corinna; Ahmed, Ahfaz; Gruber, Andrea; Løvås, Terese (Peer reviewed; Journal article, 2021)The formation of nitrogen oxide (NO) in wrinkled laminar NH3/H2/N2-air premixed flames is investigated utilizing two-dimensional Direct Numerical Simulation (DNS) with detailed chemical kinetics as well as one-dimensional ... -
Detailed operational mapping of a grate fired Biomass combustion plant for improved combustion process control
Khalil, Roger Antoine; Malik, Azhar; Ku, Xiaoke; Skreiberg, Øyvind; Fossum, Morten; Becidan, Michael; Løvås, Terese (Journal article; Peer reviewed, 2016)Biomass combustion plants in Norway are facing stricter emission regulations and lower profitability, mostly due to low energy prices. Hence, performance optimization through improved combustion process control and/or ... -
Dimensional Decomposition of Turbulent Reacting Flows
Grøvdal, Fredrik; Sannan, Sigurd; Meraner, Christoph; Li, Tian; Løvås, Terese (Peer reviewed; Journal article, 2020)A dimensional-decomposition approach, decomposing 3D into 3×1D for turbulent (reacting) flows are motivated, discussed and investigated. In the three-dimensional Linear Eddy Model (LEM3D), three orthogonally intersecting ... -
The effect of turbulence on the conversion of coal under blast furnace raceway conditions
Wartha, Eva-Maria; Haugen, Nils Erland L; Karchniwy, Ewa Malgorzata; Bösenhofer, Markus; Harasek, Michael; Løvås, Terese (Peer reviewed; Journal article, 2022)dynamics (CFD) can be used to analyze the process virtually and thus improve its performance. Different reducing agents can be used to (partially) substitute the coke and consequently reduce overall emissions. To analyze ... -
Effects of scaling laws on the combustion and NOx characteristics of hydrogen burners
Meraner, Christoph; Li, Tian; Ditaranto, Mario; Løvås, Terese (Peer reviewed; Journal article, 2020)This paper proposes a novel bidirectional linkage between a long-term energy system model and an operational power market model. This combined modelling framework provides long-term energy system investment strategies that ... -
Emission characteristics of a novel low NOx burner fueled by hydrogen-rich mixtures with methane
Dutka, Marcin Damian; Ditaranto, Mario; Løvås, Terese (Journal article; Peer reviewed, 2015) -
Experimental investigation on NOx reduction by primary measures in biomass combustion: straw, peat, sewage sludge, forest residues and wood pellets
Houshfar, Ehsan; Løvås, Terese; Skreiberg, Øyvind (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. ... -
High temperature gasification of high heating-rate chars using a flat-flame reactor
Li, Tian; Niu, Yanqing; Wang, Liang; Shaddix, Christopher; Løvås, Terese (Journal article; Peer reviewed, 2018)The increasing interest in gasification and oxy-fuel combustion of biomass has heightened the need for a detailed understanding of char gasification in industrially relevant environments (i.e., high temperature and ... -
NOx emissions and turbulent flow field in a partially premixed bluff body burner with CH4 and H2 fuels
Dutka, Marcin Damian; Ditaranto, Mario; Løvås, Terese (Journal article; Peer reviewed, 2016)The increased need for fuel flexibility and CO2 capture solutions (CCS) in the power and industrial sectors has led to higher focus on hydrogen containing fuels. The high reactivity and combustion temperature in hydrogen ... -
Numerical simulations of staged biomass grate fired combustion with an emphasis on NOx emissions
Bugge, Mette; Skreiberg, Øyvind; Haugen, Nils Erland L; Carlsson, Per; Houshfar, Ehsan; Løvås, Terese (Journal article; Peer reviewed, 2015)In the present paper NOx emissions from biomass combustion was studied, with the objective to demonstrate the applicability of stationary computational fluid dynamics simulations, including a detailed representation of the ... -
Skeletal mechanisms for prediction of NOx emission in solid fuel combustion
Li, Tian; Skreiberg, Øyvind; Løvås, Terese; Glarborg, Peter (Journal article; Peer reviewed, 2019)Emission of nitrogen oxides (NOx) is a major challenge for combustion of solid fuels. Strategies for emission control can be developed from computational fluid dynamics (CFD) simulation. This, furthermore, requires a ... -
The techno-economics of biocarbon production processes under Norwegian conditions
Olszewski, Maciej; Kempegowda, Rajesh Shivanahalli; Skreiberg, Øyvind; Wang, Liang; Løvås, Terese (Journal article; Peer reviewed, 2017) -
Three-dimensional Linear Eddy Modeling of a Turbulent Lifted Hydrogen Jet Flame in a Vitiated Co-flow
Grøvdal, Fredrik; Sannan, Sigurd; Chen, Jyh-Yuan; Kerstein, Alan R; Løvås, Terese (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, ...