Search results for "Equivalence ratio"

showing 3 items of 3 documents

Efficient Spin Torques in Antiferromagnetic CoO/Pt Quantified by Comparing Field- and Current-Induced Switching

2020

We achieve current-induced switching in collinear insulating antiferromagnetic CoO/Pt, with fourfold in-plane magnetic anisotropy. This is measured electrically by spin Hall magnetoresistance and confirmed by the magnetic field-induced spin-flop transition of the CoO layer. By applying current pulses and magnetic fields, we quantify the efficiency of the acting current-induced torques and estimate a current-field equivalence ratio of 4×10^{-11}  T A^{-1} m^{2}. The Neel vector final state (n⊥j) is in line with a thermomagnetoelastic switching mechanism for a negative magnetoelastic constant of the CoO.

Condensed Matter::Materials ScienceMagnetic anisotropyMaterials scienceCondensed matter physicsMagnetoresistanceGeneral Physics and AstronomyAntiferromagnetismTorqueCondensed Matter::Strongly Correlated ElectronsSpin-½Equivalence ratioMagnetic fieldPhysical Review Letters
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Numerical and Experimental Investigation of Equivalence Ratio (ER) and Feedstock Particle Size on Birchwood Gasification

2017

This paper discusses the characteristics of Birchwood gasification using the simulated results of a Computational Fluid Dynamics (CFD) model. The CFD model is developed and validated with the experimental results obtained with the fixed bed downdraft gasifier available at the University of Agder (UIA), Norway. In this work, several parameters are examined and given importance, such as producer gas yield, syngas composition, lower heating value (LHV), and cold gas efficiency (CGE) of the syngas. The behavior of the parameters mentioned above is examined by varying the biomass particle size. The diameters of the two biomass particles are 11.5 mm and 9.18 mm. All the parameters investigate wit…

Control and OptimizationBirchwood gasification020209 energycold gas efficiencyEnergy Engineering and Power TechnologyBiomassThermodynamics02 engineering and technologycomputational fluid dynamicsBirchwood gasification; computational fluid dynamics; equivalence ratio; cold gas efficiency; syngaslcsh:Technologyequivalence ratio0202 electrical engineering electronic engineering information engineeringElectrical and Electronic EngineeringEngineering (miscellaneous)Petroleum engineeringRenewable Energy Sustainability and the EnvironmentChemistrylcsh:TProducer gassyngasYield (chemistry)ParticleHeat of combustionParticle sizeMass fractionEnergy (miscellaneous)Syngas
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Air gasification of wood chips, wood pellets and grass pellets in a bubbling fluidized bed reactor

2021

Abstract Gasification is an attractive method for biomass-to-energy conversion and fluidized bed design is one of the best options for large scale operation. A bubbling fluidized bed reactor was used to analyze the effects of biomass type, equivalence ratio (ER) and temperature for product gas compositions. Wood chips, wood pellets and grass pellets were gasified between 650 °C and 800 °C temperature. The ER was varied between 0.08 and 0.16. Gasification of grass pellets was difficult at 800 °C due to agglomeration and the gas composition was poor compared to wood. The reactor performances improved over the temperature and 650 °C was not sufficient to achieve a reasonable carbon conversion.…

Materials science020209 energyPelletschemistry.chemical_elementBiomass02 engineering and technologycomplex mixturesIndustrial and Manufacturing Engineering020401 chemical engineering0202 electrical engineering electronic engineering information engineeringGas composition0204 chemical engineeringElectrical and Electronic EngineeringCivil and Structural EngineeringBubbling fluidized bedEconomies of agglomerationMechanical Engineeringtechnology industry and agricultureBuilding and ConstructionPulp and paper industryPollutionVDP::Teknologi: 500General EnergychemistryFluidized bedCarbonEquivalence ratio
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