Browsing USN Open Archive by Author "Timsina, Ramesh"
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Application of Autonomous Inflow Control Valve for Enhanced Bitumen Recovery by Steam Assisted Gravity Drainage
Hosnaroudi, Soheila Taghavi; Farsi Madan, Farzan; Timsina, Ramesh; Moldestad, Britt Margrethe Emilie (Peer reviewed; Journal article, 2022)Steam assisted gravity drainage is a thermal method for enhanced bitumen recovery. In this method, steam is injected to bitumen and heavy oil to reduce the viscosity and make the oil mobile. However, early breakthrough of ... -
Aspen Plus simulation of biomass gasification for different types of biomass
Timsina, Ramesh; Thapa, Rajan Kumar; Eikeland, Marianne Sørflaten (Journal article; Peer reviewed, 2019)A steady-state Aspen Plus model was developed for biomass gasification in a fluidized bed reactor. A combination of different Aspen Plus unit operations was used to model the gasification process. The model was used to ... -
Computational particle fluid dynamics simulation of biomass gasification in an entrained flow gasifier
Timsina, Ramesh; Thapa, Rajan Kumar; Moldestad, Britt Margrethe Emilie; Eikeland, Marianne Sørflaten (Journal article; Peer reviewed, 2021)Entrained flow gasification is an established technology for coal and petroleum coke particles. The technology is being investigated extensively for biomass gasification to meet the requirement of the green energy targets. ... -
Effect of particle size on flow behavior in fluidized beds
Timsina, Ramesh; Thapa, Rajan Kumar; Moldestad, Britt Margrethe Emilie; Eikeland, Marianne Sørflaten (Peer reviewed; Journal article, 2019)The fluidization behaviour depends on particle properties such as particle size, sphericity, density and the properties of the fluidizing agent. In this study, the effects of different particle sizes on fluidization behaviour ... -
Experiments and computational particle fluid dynamics simulations of biomass gasification in an air-blown fluidized bed gasifier
Timsina, Ramesh; Thapa, Rajan Kumar; Moldestad, Britt Margrethe Emilie; Eikeland, Marianne Sørflaten (Journal article; Peer reviewed, 2020)Experiments were performed in a pilot-scale bubbling fluidized bed gasification reactor with air as a fluidizing agent. Birch wood chips and sand particles were used as biomass and bed materials. Average molar product gas ... -
Mesh Sensitivity Analysis of an Entrained Flow Biomass Gasifier: A CPFD Study
Timsina, Ramesh; Barahmand, Zahir (Chapter, 2022)Biomass such as agricultural waste, forestry waste, municipal solid waste, and industrial waste, are renewable energy sources that may be used to produce biofuels. Biomass gasification is an effective and promising technology ... -
Modeling and simulation of light oil production using inflow control devices
Timsina, Ramesh; Furuvik, Nora Cecilie Ivarsdatter; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2017)Light crude oil production is the most economical and is currently serving as benchmark together with medium crude oil. The most of the conventional oil fields in the worlds are either light or medium crude oil. Conventional ... -
Modelling and simulations of bubbling fluidized bed and entrained flow biomass gasification reactors
Timsina, Ramesh (Doctoral dissertations at the University of South-Eastern Norway;118, Doctoral thesis, 2022-02-24)The world needs sustainable energy solutions to replace fossil fuels. Climate change is the defining challenge of our time. New reports from the International Energy Agency (IEA, 2021)1 have developed a roadmap for max ... -
Near-well simulations and modelling of oil production from reservoir
Timsina, Ramesh (Master thesis, 2017)One of the major challenges that the oil industry faces today is water breakthrough and high production of water from mature oil fields. Early water breakthrough can occur due to high frictional pressure drop in the well ... -
Simulation of air-biomass gasification in a bubbling fluidized bed using CPFD model
Timsina, Ramesh; Moldestad, Britt Margrethe Emilie; Eikeland, Marianne Sørflaten; Thapa, Rajan Kumar (Journal article; Peer reviewed, 2019)Biomass is a renewable energy source. Biomass gasification process produces producer gas, which can be further used for power generation or as raw materials for the production of secondary fuels. Experiment on the air ... -
Simulation of entrained flow gasification reactor with Multi Phase Particle in Cell (MP-PIC) approach
Timsina, Ramesh; Thapa, Rajan Kumar; Moldestad, Britt Margrethe Emilie; Eikeland, Marianne Sørflaten (Journal article; Peer reviewed, 2020)An Entrained flow gasification reactor is studied in this work. Entrained flow reactors are best suited for a feed with small particles at large capacity, at high temperatures, pressures and with short residence time. This ... -
Study of gasification behavior for a biorefinery lignin waste in a fluidized bed gasification reactor
Ghosh, Saugata (Master thesis, 2022)Sustainable energy supply and waste management are two of the major challenges of the present time. The proper utilization of the vast resource of renewable biomass is necessary for a sustainable civilization toward the ...