Browsing SINTEF Open by Author "Haugen, Nils Erland L"
Now showing items 1-20 of 38
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A comprehensive model for char particle conversion in environments containing O2 and CO2
Haugen, Nils Erland L; Mitchell, Reginald E.; Tilghman, Matthew B. (Journal article; Peer reviewed, 2015)In this work, conversion of char is studied in a simulation code that includes a simplified heterogeneous adsorption–desorption reaction mechanism for char chemical reactivity and uses GRI-Mech 3.0 as the chemical kinetic ... -
Assessment of Transient NOx Reduction Potential in Wood Stoves
Skreiberg, Øyvind; Li, Tian; Bugge, Mette; Haugen, Nils Erland L (Peer reviewed; Journal article, 2020) -
Bed Model for Grate-Fired Furnaces: Computational Fluid Dynamics Modeling and Comparison to Experiments
Haugen, Nils Erland L; Bugge, Mette; Mack, Alexander; Li, Tian; Skreiberg, Øyvind (Peer reviewed; Journal article, 2022)A detailed but still central processing unit (CPU)-efficient bed model for grate-fired combustion of biomass and waste is developed. Simulations of wood chip combustion are performed, and the results are compared to ... -
Building the world's largest Chemical Looping Combustion (CLC) unit
Haugen, Nils Erland L; Li, Zhenshan; Gouraud, Vincent; Bertholin, Stephane; Li, Weicheng; Larring, Yngve; Luo, Kun; Szlek, Andrzej; Flach, Todd; Langørgen, Øyvind; Liu, Xinglei; Yazdanpanah, Mahdi (Peer reviewed; Journal article, 2023)The world's largest Chemical Looping Combustion (CLC) demonstration unit is being built close to the city of Chengdu in China. The design and construction of the unit, as well as the coming testing, is done within the ... -
Chemical Looping Combustion of Methane Using a Copper-based Oxygen Carrier in a 150 kW Reactor System
Langørgen, Øyvind; Saanum, Inge; Haugen, Nils Erland L (Journal article; Peer reviewed, 2017)Chemical looping combustion experiments have been conducted in the 150 kW CLC reactor at SINTEF Energy Research in Trondheim with good results. Methane was used as fuel and porous copper oxide based particles, with a bulk ... -
Cloud-droplet growth due to supersaturation fluctuations in stratiform clouds
Li, Xiangyu; Svensson, Gunilla; Brandenburg, Axel; Haugen, Nils Erland L (Journal article; Peer reviewed, 2019)Condensational growth of cloud droplets due to supersaturation fluctuations is investigated by solving the hydrodynamic and thermodynamic equations using direct numerical simulations (DNS) with droplets being modeled as ... -
Combustion of Thermally Thick Wood Particles: A Study on the Influence of Wood Particle Size on the Combustion Behavior
Haberle, Inge; Haugen, Nils Erland L; Skreiberg, Øyvind (Journal article; Peer reviewed, 2018) -
Comprehensive Char Particle Gasification Model Adequate for Entrained-Flow and Fluidized-Bed Gasifiers
Tilghman, Matthew B.; Haugen, Nils Erland L; Mitchell, Reginald E. (Journal article; Peer reviewed, 2017)A robust, single-particle gasification model is presented that is capable of predicting char particle behavior in environments established in typical fluidized bed and entrained flow gasifiers. It employs a heterogeneous ... -
Convergence properties of detonation simulations
Qian, Chengeng; Wang, Cheng; Liu, JianNan; Brandenburg, Axel; Haugen, Nils Erland L; Liberman, Mikhael A (Journal article; Peer reviewed, 2019) -
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 ... -
D3.4 Fuel conversion phenomena
Haugen, Nils Erland L; Langørgen, Øyvind; Saanum, Inge; Karchniwy, Ewa Malgorzata; Klimanek, Adam; Szlek, Andrzej; Korus, Agnieszka; Sladek, Slawomir; Bertholin, Stephane; Tebianian, Sina; Tilland, Airy; Luo, Kun; Zhang, Hancong; Sun, Liyan; Masi, Enrica; Simonin, Olivier (Research report, 2022) -
A detailed experimental study on the thermal decomposition behaviour of wood pellets under inert and oxidative conditions in a fixed bed reactor
Skreiberg, Øyvind; Bugge, Mette; Sandquist, Judit; Buvarp, Fredrik; Haugen, Nils Erland L (Peer reviewed; Journal article, 2021) -
Drag force for a burning particle
Zhang, Hancong; Luo, Kun; Haugen, Nils Erland L; Mao, Chaoli; Fan, Jianren (Peer reviewed; Journal article, 2020)Fully-resolved simulations of a burning char particle are performed to understand the effects of chemical reastions on the drag force by using the ghost cell immersed boundary method. The momentum, heat and mass transfers ... -
Drying of Thermally Thick Wood Particles: A Study of the Numerical Efficiency, Accuracy, and Stability of Common Drying Models
Haberle, Inge; Haugen, Nils Erland L; Skreiberg, Øyvind (Journal article; Peer reviewed, 2017) -
Effect of Turbulence on Collisional Growth of Cloud Droplets
Li, Xiangyu; Brandenburg, Axel; Svensson, Gunilla; Haugen, Nils Erland L; Mehlig, Bernhard; Rogachevskii, Igor (Journal article; Peer reviewed, 2018)Weinvestigate the effect of turbulence on the collisional growth of micrometer-sized droplets through highresolution numerical simulations with well-resolved Kolmogorov scales, assuming a collision and coalescence efficiency ... -
The effect of turbulence on mass transfer in solid fuel combustion: RANS model
Karchniwy, Ewa Malgorzata; Haugen, Nils Erland L; Klimanek, Adam F.; Langørgen, Øyvind; Sladek, Slawomir (Peer reviewed; Journal article, 2021)In this paper, a kinetic-diffusion surface combustion model is examined. The model is modified such that two effects of turbulence are included: 1) enhancement of the mass transfer due to relative velocity between particles ... -
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 ... -
The effects of Stefan flow on the flow surrounding two closely spaced particles
Jayawickrama, Thamali R.; Chishty, Muhammad Aqib; Haugen, Nils Erland L; Bäbler, Matthâus Ulrich; Umeki, Kentaro (Peer reviewed; Journal article, 2023)The aim of the work was to study the effects of neighboring particles with uniform Stefan flow in particle–fluid flows. Particle-resolved numerical simulations were carried out for particles emitting a uniform Stefan flow ... -
Evaluation of CLC as a BECCS technology from tests on woody biomass in an auto-thermal 150-kW pilot unit
Langørgen, Øyvind; Saanum, Inge; Khalil, Roger Antoine; Haugen, Nils Erland L (Peer reviewed; Journal article, 2023)In this work, woody biomass is converted by chemical looping combustion (CLC) in the auto-thermally operated 150-kW pilot unit at SINTEF Energy Research in Norway, using ilmenite as an oxygen carrier. The pilot unit consists ... -
Fully resolved simulations of single char particle combustion using a ghost-cell immersed boundary method
Luo, Kun; Mao, Chaoli; Fan, Jianren; Zhuang, Zhenya; Haugen, Nils Erland L (Journal article; Peer reviewed, 2018)