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Blar i NTNU Open på forfatter "Ertesvåg, Ivar Ståle"

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    • An Extended Corresponding States Equation of State (EoS) for CCS Industry 

      Ibrahim, Mohamed; Skaugen, Geir; Ertesvåg, Ivar Ståle (Journal article; Peer reviewed, 2015)
      For a good design of all the processes in Carbon Capture and Storage, the thermodynamics of the CO2 and CO2 mixtures should be accurately predicted. Among these mixtures are CO2-water systems that are very difficult to ...
    • Analysis of Some Recently Proposed Modifications to the Eddy Dissipation Concept (EDC) 

      Ertesvåg, Ivar Ståle (Journal article; Peer reviewed, 2020)
      The widespread use of the Eddy Dissipation Concept (EDC) of Magnussen has led to a number of suggestions to modify the model. These modifications are to a varying extent in agreement with the underlying ideas of EDC. This ...
    • Analysis of the Eddy Dissipation Concept formulation for MILD combustion modelling 

      Lewandowski, Michal T; Ertesvåg, Ivar Ståle (Journal article, 2018)
      Performance of the Eddy Dissipation Concept (EDC) in the regime of Moderate and Intense Low-oxygen Dilution (MILD) combustion is investigated. The special MILD features, where chemical and turbulence time scales are ...
    • Assessment of algebraic subgrid scale models for the flow over a triangular cylinder at Re = 45000 

      Lysenko, Dmitry; Ertesvåg, Ivar Ståle (Peer reviewed; Journal article, 2021)
      The turbulent separated flow over an equilateral triangular cylinder at a Reynolds number 45000 (based on the triangle edge) is studied by means of large-eddy simulation (LES). The moderate Reynolds number is chosen in ...
    • Biomass gasification integration in recuperative gas turbine cycles and recuperative fuel cell integrated gas turbine cycles: - 

      Løver, Kristian Aase (Master thesis, 2007)
      A multi-reactor, multi-temperature, waste-heat driven biomass thermochemical converter is proposed and simulated in the process simulation tool Aspen Plus . The thermochemical converter is in Aspen Plus integrated with a ...
    • Coal-fired Power Plants based on Oxy-combustion with Carbon Capture: Combustion Conditions and Water Consumption 

      Almås, Karen (Master thesis, 2012)
      Nesten all konvensjonell dampkraftproduksjon er avhengig av vann for kjøling. Tilgang til vann er også nødvendig i drift av flere andre delsystemer i et slikt kraftverk. I tillegg medfører integrasjon av CO2 fangst ofte ...
    • Compressible flows in process equipment: Problems, methods and models 

      Skrataas, Stine Mia Rømmesmo (Master thesis, 2011)
      SIMPLE, SIMPLER, SIMPLEC and IDEAL are solution procedures originally developed for incompressible flows and staggered grids. For SIMPLE, SIMPLER and SIMPLEC, extensions for collocated grids and for treatment of flows at ...
    • Computational analysis of premixed methane-air flame interacting with a solid wall or a hydrogen porous wall 

      Salimath, Prashant; Ertesvåg, Ivar Ståle; Gruber, Andrea (Peer reviewed; Journal article, 2020)
      The process of flame-wall interaction for premixed methane-air flames is investigated by direct numerical simulation. The flames propagate towards an isothermal, chemically inert surface, consisting of either a solid ...
    • Discharge and Spreading of Carbon Dioxide from Leakages 

      Brox, Eivind (Master thesis, 2013)
      Something
    • Effects of external cooling on smoldering fire in wood pellets 

      Snersrud, Dag Olav (Master thesis, 2021)
      Ulmebrann er en saktegående eksoterm reaksjon, der brensel og oksygen er konsumert for å produsere varme. Det som skiller ulmebrann fra andre forbrenningsformer, er at den brenner uten en synlig flamme. Ulmebranner er også ...
    • Energibruk og energiutnyttelse ved Kårstø gassprosesseringsanlegg 

      Wølneberg, Pia Wendela (Master thesis, 2007)
      Hensikten med denne masteroppgaven har vært å studere energiforbruket på Kårstø gass- prosesseringsanlegg. Økende energipriser og strengere miljøkrav fører til et økende fokus på energibesparende tiltak. Denne rapporten ...
    • Energieffektiv hydrogenlagring: eksergianalyse av adsorpsjon 

      Berntsen, Trond Einar Egeberg (Master thesis, 2012)
      Hydrogenlagring er en nøkkelteknologi for etablering av en hydrogenøkonomi. Adsorpsjon er en av hydrogenlagringsteknologiene som for tiden utforskes sammen med hydrogen lagret som komprimert gass, væske, og i metallhydrider. ...
    • Evaluation of a North Sea oil platform using exergy analysis 

      Jøssang, Knut (Master thesis, 2013)
      The motivation is to explore the applicability of exergy analysis as an evaluation and monitoring toolfor an offshore platform. The focus should be turned from energy efficiency to exergy efficiency,because to use an ...
    • Exergy analysis of combined absorption-compression heat pump with ammonia-water mixture as working fluid 

      Ahrens, Marcel Ulrich; Ertesvåg, Ivar Ståle; Eikevik, Trygve Magne (Chapter, 2020)
      In this paper, investigations on the development of industrial high temperature heat pumps are carried out based on the exergy analysis of different compressor configurations. The combined absorption-compression heat pump ...
    • Experimental study of smouldering fires in wood pellets 

      Rebaque Valdes, Virginia (Master thesis, 2017)
      Development of renewable energy sources for energy production has become increasingly significant in European energy markets. Energy consumption is almost completely due to petroleum, a non-renewable resource that is ...
    • Experimental study of smouldering in wood pellets with and without air draft 

      Rebaque, Virginia; Ertesvåg, Ivar Ståle; Mikalsen, Ragni Fjellgaard; Steen-Hansen, Anne (Journal article; Peer reviewed, 2020)
      Dry wood pellets (diameter 8 mm) of mixed Norwegian spruce and pine were tested in samples of 1.25 kg (1.7 l) in configurations with and without air draft from below. The pellets were placed in a vertical 15 cm diameter ...
    • Gas turbine exhaust gas heat recovery by organic Rankine cycles (ORC) for offshore combined heat and power applications - Energy and exergy analysis 

      Nami, Hossein; Ertesvåg, Ivar Ståle; Otero, Roberto Agromayor; Riboldi, Luca; Nord, Lars O. (Journal article; Peer reviewed, 2018)
      Effective heat and power supply to offshore installations leads to environmental benefits, but the efficiency is often limited by requirements and constraints connected to the offshore environment. An exergetic analysis ...
    • Heat generation and conduction in combined ultrasound imaging and therapy transducers 

      Nydal, Britt Ingunn (Master thesis, 2017)
      In this thesis, the heat sources and heat transfer in high power, multifrequency transducers to be used for both ultrasound imaging and mediation of drug delivery, are studied. Electrical energy is converted into acoustic ...
    • Integrated multiscale simulation of CHP based district heating system 

      Li, Peifeng; Nord, Natasa; Ertesvåg, Ivar Ståle; Ge, Zhihua; Yang, Zhiping; Yang, Yongping (Journal article; Peer reviewed, 2015)
      Many studies have been carried out separately on combined heat and power and district heating. However, little work has been done considering the heat source, the district heating network and the heat users simultaneously, ...
    • Irreversibility of combustion, heat and mass transfer 

      Nadim, Pedram (Master thesis, 2011)
      Combustion is by far the most commonly used technology for energy conversion. The analysis of entropy generation and exergy loss is normally used to optimize thermal energy technologies such as gas turbines. The loss of ...

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