Browsing Institutt for energi og prosessteknikk by Title

Now showing items 4131-4150 of 4152

    • Wind Turbine Simulations with OpenFOAM 

      Hoem, Maria Enger (Master thesis, 2018)
      An actuator disk model is improved by including an impermeable hub and nacelle. This improves the wake flow a lot, but it turns out that the actuatorDiskExplicitForce model is mesh dependent. A mesh is made that provides ...

    • Wind Turbine Wake Interactions - The Influence of Shear on a Wind Turbine Wake 

      Jalil, Abdur Rahman (Master thesis, 2015)
      Full wake measurements have been performed on a model wind turbine at NTNU s wind tunnel to investigate the impact of shear flow compared to uniform flow on the wake flow. Mean and turbulent velocity measurements have been ...

    • Winglet optimization for a model-scale wind turbine 

      Hansen, Thomas Henrik Hertzfelder; Mühle, Franz Volker (Peer reviewed; Journal article, 2018)
      A winglet optimization method is developed and tested for a model-scale wind turbine. The best-performing winglet shape is obtained by constructing a Kriging surrogate model, which is refined using an infill criterion based ...

    • Wood burning habits and its effect on the electrical energy demand of a retrofitted Norwegian detached house 

      Felius, Laurina C; Thalfeldt, Martin; Georges, Laurent; Hrynyszyn, Bozena Dorota; Dessen, Fredrik; Hassan Mohamed, Mohamed Hamdy (Journal article; Peer reviewed, 2019)
      Using firewood as a space heating source is a popular solution in Norwegian housing and can significantly reduce the electrical energy demand of houses. This study analysed habits and reasons for using a wood stove from ...

    • Wood Pellets Utilized in the Commercial and Residential Sectors: - an in-depth study of selected barriers for increased use 

      Skjevrak, Geir (Doktoravhandlinger ved NTNU, 1503-8181; 2013:322, Doctoral thesis, 2013)
      Biomass is an important energy carrier since it is a renewable source and the energy content in the fuel can be stored over time and also generate high temperatures. Bioenergy can be in liquid form, gas-phase or solid. The ...

    • Wood stove material configurations for increased thermal comfort 

      Skreiberg, Øyvind; Georges, Laurent (Journal article; Peer reviewed, 2017)
      In this work, a numerical model of the heat transfer through composite wood stove walls has been used to study the effect of material configurations on the heat storage and the heat release profile to the room, to arrive ...

    • Wood-Pellet Heating in Norway: Early Adopters' Satisfaction and Problems That Have Been Experienced 

      Skjevrak, Geir; Sopha, Bertha Maya (Journal article; Peer reviewed, 2012)
      Given the vital role of early adopters during the early stage of wood-pellet heating development, this study aims to explore the factors that explain the overall satisfaction among the early adopters of this type of heating ...

    • Work and Heat Exchange Networks – Opportunities and Challenges 

      Yu, Haoshui; Fu, Chao; Gundersen, Truls (Journal article; Peer reviewed, 2018)
      Design and optimization of Heat Exchanger Networks (HENs) is well established and has been heavily applied in the process industries since its pioneering period in the 1970s and 1980s. While temperature and thermal energy ...

    • Work and Heat Integration: An emerging research area 

      Fu, Chao; Vikse, Matias; Gundersen, Truls (Journal article; Peer reviewed, 2018)
      The extension from Heat Integration (HI) and design of Heat Exchanger Networks (HENs) to including heating and cooling effects from pressure changing equipment has been referred to as Work and Heat Integration and design ...

    • Work and heat integration—A new field in process synthesis and process systems engineering 

      Yu, Haoshui; Fu, Chao; Vikse, Matias; Gundersen, Truls (Journal article; Peer reviewed, 2018)
      The extension from heat integration and design of heat exchanger networks (HENs) to including heating, cooling, and power effects from pressure changing equipment has been referred to as work and heat integration and design ...

    • Work Exchange Networks (WENs) and Work and Heat Exchange Networks (WHENs): A review of the current state of the art 

      Yu, Haoshui; Fu, Chao; Gundersen, Truls (Peer reviewed; Journal article, 2020)
      This paper provides a current state-of-the-art review of literature on work exchange networks (WENs) and work and heat exchange networks (WHENs). Heat exchange networks (HENs) and mass exchange networks (MENs) have been ...

    • Yaw-effekter på vindturbiner 

      Holten, Tom Håkon (Master thesis, 2010)
      En vindturbin med skjev innstrømning er behandlet ved hjelp av bladelementmetoden. Det har vist seg av metoden kan, ved hjelp av noen modifiseringer, også kan benyttes for å regne på vindturbiner med skjev innstrømning. ...

    • Yield improvements in anaerobic digestion of lignocellulosic feedstocks 

      Hashemi, Sayedbehnam; Sarker, Shiplu; Lamb, Jacob Joseph; Lien, Kristian Myklebust (Peer reviewed; Journal article, 2020)
      The new EU bioenergy sustainability criteria demonstrate that bioenergy sustainability can be a challenge (Schlegel and Kaphengst, 2007). In 1990s, the energy crops were the main source for biogas production in Europa; ...

    • ZEB Laboratory - Research Possibilities 

      Time, Berit; Nocente, Alessandro; Mathisen, Hans Martin; Førland-Larsen, Arne; Myhr, Anders Ramberg; Jacobsen, Terje; Gustavsen, Arild (SINTEF Notat;, Research report, 2019)
      The ZEB Laboratory is an experimental facility located in NTNU Gløshaugen campus in Trondheim. The building is designed as 4 storeys high and 1800 m2 area office space and should achieve the ZEB-COM ambition level over 60 ...

    • The ZEB Laboratory: the development of a research tool for future climate adapted zero emission buildings 

      Nocente, Alessandro; Time, Berit; Mathisen, Hans Martin; Kvande, Tore; Gustavsen, Arild (Peer reviewed; Journal article, 2021)
      The building sector is responsible for approximately 40 % of the energy consumption and carbon emissions worldwide. Buildings of the future will have to comply not only with stricter energy regulations, but they will also ...

    • Zero Emission Neighbourhoods in Smart Cities 

      Wiik, Marianne Rose Kjendseth; Fjellheim, Kristin; Vandervaeren, Camille; Lien, Synne Krekling; Meland, Solveig; Nordström, Tobias; Cheng, Caroline Y; Brattebø, Helge; Thiis, Thomas Kringlebotn (ZEN Report, Research report, 2022)

    • ZERO EMISSION NEIGHBOURHOODS IN SMART CITIES Definition, key performance indicators and assessment criteria: Version 3.0 

      Wiik, Marianne Rose Kjendseth; Fjellheim, Kristin; Vandervaeren, Camille Margaux L.; Lien, Synne Krekling; Meland, Solveig; Nordström, Tobias; Baer, Daniela; Cheng, Caroline Y; Truloff, Shannon; Brattebø, Helge; Gustavsen, Arild (ZEN Report;, Research report, 2022)
      This document outlines the definition, key performance indicators (KPI) and assessment criteria for the Research Centre on Zero Emission Neighbourhoods in Smart Cities (ZEN Research Centre). This third version of the ZEN ...

    • Zero Emission Neighbourhoods in Smart Cities: Definition, Key Performance Indicators and Assessment Criteria: Version 1.0 

      Wiik, Marianne Rose Kjendseth; Fufa, Selamawit Mamo; Krogstie, John; Ahlers, Dirk; Wyckmans, Annemie; Driscoll, Patrick Arthur; Brattebø, Helge; Gustavsen, Arild (ZEN Report;, Research report, 2018)
      This document outlines the definition, key performance indicators (KPI) and assessment criteria for the Research Centre on Zero Emission Neighbourhoods in Smart Cities (ZEN research centre). This first version of the ZEN ...

    • Zero-cost partial decarbonization of natural gas via molten salt pyrolysis 

      Cloete, Schalk Willem Petrus; Melone, Florine; Arnaiz del Pozo, Carlos; Dhoke, Chaitanya; Farmen, Øistein; Zaabout, Abdelghafour (Peer reviewed; Journal article, 2023)
      Partial decarbonization of natural gas has the potential to kickstart the hydrogen economy. Up to 20% hydrogen volume can be safely accommodated in existing natural gas networks, removing the problem of insufficient ...

    • Zonal modeling of air distribution impact on the long-range airborne transmission risk of SARS-CoV-2 

      Aganovic, Amar; Cao, Guangyu; Kurnitski, Jarek; Melikov, Arsen; Wargocki, Pawel (Peer reviewed; Journal article, 2022)
      A widely used analytical model to quantitatively assess airborne infection risk is the Wells-Riley model which is limited to complete air mixing in a single zone. However, this assumption tends not to be feasible (or ...