Blar i Institutt for prosess-, energi- og miljøteknologi på tittel

Viser treff 198-217 av 333

    • 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 ...

    • Methane from Syngas by Anaerobic Digestion 

      Shah, Sanjay; Bergland, Wenche Hennie; Bakke, Rune (Journal article; Peer reviewed, 2017)
      Anaerobic digestion (AD) is a prominent green technology used for methane production from organic waste. Previous studies have shown that the amount of CH4 produced during anaerobic digestion can be increased by adding ...

    • Method of identifying an operating regime in a bubbling fluidized bed gasification reactor 

      Jaiswal, Rajan; Furuvik, Nora Cecilie Ivarsdatter; Thapa, Rajan Kumar; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2020)
      This work presents a new method for identifying the bubbling regime of a fluidized bed gasification reactor. The method has been developed using experimental measurements and a computational model. Pressure drops are ...

    • Model Based Early Kick/Loss Detection and Attenuation with Topside Sensing in Managed Pressure Drilling 

      Jinasena, Asanthi; Holta, Haavard H. F.; Jondahl, Morten Hansen; Welahettige, Prasanna Kumara Welahetti; Aamo, Ole Morten; Sharma, Roshan; Viumdal, Håkon; Lie, Bernt (Peer reviewed; Journal article, 2020)
      Early kick/loss detection is a crucial part of safe well control, and it plays a major role in the reduction of risk and non-productive time in drilling. In conventional drilling, topside sensing is used for early kick/loss ...

    • Model uncertainty of interfacial area and mass transfer coefficients in absorption column packings 

      Karunarathne, Sumudu S.; Eimer, Dag-Arne; Øi, Lars Erik (Journal article; Peer reviewed, 2017)
      Uncertainty in model input parameters propagates through the model to make model output imprecision. Here, mathematical models used to calculate interfacial area and mass transfer coefficient for both random and structured ...

    • Modeling an image analysis of FAE 

      Vågsæther, Knut; Christensen, Svein Olav; Bjerketvedt, Dag (Conference lecture, 2008-09)

    • Modeling and simulation of lab-scale anaerobic co-digestion of MEA waste 

      Wang, Shuai; Hovland, Jon; Bakke, Rune (Journal article; Peer reviewed, 2014)
      Anaerobic digestion model No.1 (ADM1) was applied and expanded in this study to model and simulate anaerobic digestion (AD) of an industrial carbon capture reclaimer MEA (monoethanolamine) waste (MEAw) together with easily ...

    • 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 ...

    • Modeling N/S ratio and temperature effects in simultaneous biological denitrification and sulfide oxidation 

      Sposob, Michal; Bakke, Rune; Dinamarca, Carlos (Journal article; Peer reviewed, 2017)
      A model describing the simultaneous removal of NO3- and HS- by microorganisms is presented here. The oxidation of HS- (electron donor) can be controlled by the appropriate dosage of NO3-. The developed model, which includes ...

    • Modeling of the Energy Consumption within the Framework of the Energy Efficiency Management 

      Pavlova, Yuliia; Rondeel, Wilhelm; Kotsar, Oleg (Conference object; Peer reviewed, 2015-11-25)
      Insufficient level of the energy efficiency in Ukraine requires an immediate reformation of the Ukrainian power sector in order to stimulate power enterprises and final consumers to decreasing of fossil fuel and power ...

    • Modeling temperature effects in anaerobic digestion of domestic wastewater 

      Lohani, Sunil Prasad; Wang, Shuai; Bergland, Wenche Hennie; Khanal, Sanjay Nath; Bakke, Rune (Journal article, 2018)
      A combination of septic tank (ST) and up-flow anaerobic sludge blanket (UASB) as treatment for domestic wastewater was modeled with the anaerobic digestion model 1 (ADM1). The model was used to visualize the influence of ...

    • Modelling anaerobic digestion during temperature and load variations 

      Bergland, Wenche Hennie; Bakke, Rune (Journal article; Peer reviewed, 2016)
      Experimental results and simulations based on the Anaerobic Digestion Model No.1 (ADM1) with temperature effects on kinetics were used to evaluate rate limiting steps in sludge bed anaerobic digestion (AD) during load and ...

    • Modelling of fast fueling of pressurized hydrogen tanks for maritime applications 

      Kesana, Netaji Ravikiran; Welahettige, Prasanna; Hansen, Per Morten; Ulleberg, Øystein; Vågsæther, Knut (Journal article; Peer reviewed, 2023)
      This paper studies fast fueling of gaseous hydrogen into large hydrogen (H2) tanks suitable for maritime applications. Three modeling methods have been developed and evaluated: (1) Two-dimensional computational fluid dynamic ...

    • Models for Predicting Average Bubble Diameter and Volumetric Bubble Flux in Deep Fluidized Beds 

      Agu, Cornelius Emeka; Pfeifer, Christoph; Eikeland, Marianne Sørflaten; Tokheim, Lars-André; Moldestad, Britt Margrethe Emilie (Journal article; Peer reviewed, 2018)
      The average bubble diameter and volumetric bubble flux give indications about the overall bed expansion in a fluidized bed. As these properties depend on the particle properties and fluidized bed regime, their accurate ...

    • Moving Bed Biofilm Process in Activated Sludge Model 1 for Reject Water Treatment 

      Sivalingam, Vasan; Arachchige, Gamunu L. Samarakoon; Dinamarca, Carlos (Peer reviewed; Journal article, 2021)
      A moving bed biofilm (MBB) process was modelled in AQUASIM using the standard activated sludge model 1 (ASM1) as a baseline. The model was controlled against experimental data from a pilot Hybrid Vertical Anaerobic Biofilm ...

    • Naturally changing reference conditions: Evidence of isostatic uplift being the main cause of changes in ecological status in a SW Norwegian fjord system 

      Dolven, Jane Karine Lønne; Alve, Elisabeth (Peer reviewed; Journal article, 2021)
      According to the European Water Framework Directive (WFD), restoration actions are needed if the present-day ecological quality status (EcoQS) is worse than good. However, less stringent environmental objectives may be ...

    • Near Well CFD Simulation of SAGD Extra Heavy Oil Production 

      Kahawalage, Amila Chandra; Halvorsen, Britt; Mathiesen, Vidar (Journal article; Peer reviewed, 2015-11-25)
      Near well computational fluid dynamic simulation for extra heavy oil production using steam assisted gravity drainage was studied with ANSYS Fluent software. Computational fluid dynamic simulation can predict the multiphase ...

    • Near Well Simulation and Modelling of Oil Production From Heavy Oil Reservoirs 

      Malagalage, Anjana; Halvorsen, Britt (Conference object; Peer reviewed, 2015-11-25)
      Heavy oil reservoirs cover up two third of the world's hydrocarbon reservoirs. Even though it is vast energy resource, heavy oil recovery is not considered economical due to its high viscous properties. Generally horizontal ...

    • Near Well Simulation of CO2 Injection for Enhanced Oil Recovery (EOR) 

      Chathurangani, L.B.J.; Halvorsen, Britt (Journal article; Peer reviewed, 2015-11-25)
      A major challenge in oil industry is the declining oil production and the relatively low recovery rate. Estimates show that although the oil is localized and mobile, more than half of the oil is remaining in the reservoir ...

    • Near Well Simulation of Extra-Heavy Oil Production Using SAGD 

      Kou, Guandong; Halvorsen, Britt (Conference object; Peer reviewed, 2015-11-25)
      Heavy oil and bitumen represent a massive world resource more than twice the size of global reserves of light or conventional oil. In reservoirs with extra heavy oil and bitumen, thermal methods are used to reduce the oil ...