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Browsing NTNU Open by Author "Nord, Lars O."

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Now showing items 1-20 of 53

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    • Acid Gas Removal in Geothermal Power Plant in Iceland 

      Berstad, David Olsson; Nord, Lars O. (Journal article; Peer reviewed, 2016-01)
      A large part of the energy covering the electricity and heating demands in Iceland is generated in geothermal power plants. The Hellisheiði power plant, designed for 300 MWe and 133 MWth, is located in close proximity to ...
    • An Integrated Assessment of the Environmental and Economic Impact of Offshore Oil Platform Electrification 

      Riboldi, Luca; Völler, Steve; Korpås, Magnus; Nord, Lars O. (Journal article; Peer reviewed, 2019)
      Electrification of offshore oil and gas installations on the Norwegian continental shelf is one of several options to decrease the CO2 emitted from these installations. However, there is an ongoing debate regarding how the ...
    • Applicability and validation of use of equilibrium-based absorber models with reduced stage efficiency for dynamic simulation of post-combustion CO2 capture processes 

      Dutta, Rohan; Nord, Lars O.; Bolland, Olav (Journal article; Peer reviewed, 2017)
      Use of complex rate-based models for absorbers in a post-combustion CO2 capture process may lead to high computational complexity and simulation time. Method using reduced stage efficiency in equilibrium-based model for ...
    • Assessment of organic Rankine cycle part-Load performance as gas turbine bottoming cycle with variable area nozzle turbine technology 

      Motamed, Mohammad Ali; Nord, Lars O. (Peer reviewed; Journal article, 2021)
      Power cycles on offshore oil and gas installations are expected to operate more at varied load conditions, especially when rapid growth in renewable energies puts them in a load-following operation. Part-load efficiency ...
    • CCS on Offshore Oil and Gas Installation - Design of Post Combustion Capture System and Steam Cycle 

      Nord, Lars O.; Anantharaman, Rahul; Chikukwa, Actor; Mejdell, Thor (Journal article; Peer reviewed, 2017)
      Most of the released CO2 on offshore oil and gas installation originates from the gas turbines that power the installations. For certain offshore installations, CO2 capture and storage (CCS) could be an alternative to ...
    • Combined heat and power dynamic economic dispatch considering field operational characteristics of natural gas combined cycle plants 

      Yu, Haiquan; Jianxin, Zhou; Fengqi, Si; Nord, Lars O. (Peer reviewed; Journal article, 2021)
      Combined heat and power dynamic economic dispatch (CHPDED) is one of the key technologies for the efficient operation of natural gas combined cycle (NGCC) plants in integrated energy systems. In this study, based on the ...
    • Combined heat and power plant on offshore oil and gas installations 

      Riboldi, Luca; Skjefstad, Håvard Slettahjell; Nord, Lars O.; Følgesvold, Eirik (Journal article; Peer reviewed, 2016)
      Implementation of energy efficient technologies is an issue of growing importance for the offshore oil and gas industry. The rising awareness to increasing levels of CO2 in the atmosphere is a major contributor to this ...
    • Compact steam bottoming cycles: model validation with plant data and evaluation of control strategies for fast load changes 

      Nord, Lars O.; Mocholí Montañés, Rubén (Journal article; Peer reviewed, 2018)
      Power plants installed on offshore oil and gas installations need to be operated in a flexible manner in order to accommodate the variability in heat and power demands. The present paper describes steady-state process model ...
    • Concepts for lifetime efficient supply of power and heat to offshore installations in the North Sea 

      Riboldi, Luca; Nord, Lars O. (Journal article; Peer reviewed, 2017)
      This paper assesses different concepts for efficient supply of power and heat to specific offshore installations in the North Sea, with the objective of cutting carbon dioxide emissions. The concepts analyzed include ...
    • Concepts for lifetime efficient supply of power and heat to offshore installations in the North Sea 

      Riboldi, Luca; Nord, Lars O. (Journal article; Peer reviewed, 2017)
      This paper assesses different concepts for efficient supply of power and heat to specific offshore installations in the North Sea, with the objective of cutting carbon dioxide emissions. The concepts analyzed include ...
    • Demonstrating load-change transient performance of a commercial-scale natural gas combined cycle power plant with post-combustion CO2 capture 

      Mocholí Montañés, Rubén; Gardarsdóttir, Stefanía Ósk; Johnson, Filip; Normann, Fredrik; Nord, Lars O. (Journal article; Peer reviewed, 2017)
      The present work aims to study the transient performance of a commercial-scale natural gas combined cycle (NGCC) power plant with post-combustion CO2 capture (PCC) system via linked dynamic process simulation models. The ...
    • Design of an Experimental ORC Expander Setup Using Natural Working Fluids 

      Pardiñas, Ángel Á.; Pilarczyk, Marcin; Agromayor, Roberto; Nord, Lars O. (Chapter, 2019)
      Organic Rankine Cycles (ORC) are an efficient and cost-effective technology to generate power from waste heat. Arguably, the two most important factors affecting the performance of the Rankine cycle are the choice of working ...
    • Does CCS reduce power generation flexibility? A dynamic study of combined cycles with post-combustion CO2 capture 

      Rúa, Jairo; Bui, Mai; Nord, Lars O.; Mac Dowell, Niall (Journal article; Peer reviewed, 2020)
      To date, the deployment, integration, and utilization of intermittent renewable energy sources, such as wind and solar power, in the global energy system has been the cornerstone of efforts to combat climate change. At the ...
    • Dynamic Process Model Development and Validation with Transient Plant Data Collected from an MEA Test Campaign at the CO2 Technology Center Mongstad 

      Mocholí Montañés, Rubén; Flø, Nina Enaasen; Dutta, Rohan; Nord, Lars O.; Bolland, Olav (Journal article; Peer reviewed, 2017)
      This work focuses on the development and validation of a dynamic process model of the post-combustion CO2 chemical absorption process with temperature swing absorption (TSA) using aqueous monoethanolamine (MEA) as solvent. ...
    • Dynamic Process Model Validation and Control of the Amine Plant at CO2 Technology Centre Mongstad 

      Mocholí Montañés, Rubén; Flø, Nina Enaasen; Nord, Lars O. (Journal article; Peer reviewed, 2017)
      This paper presents a set of steady-state and transient data for dynamic process model validation of the chemical absorption process with monoethanolamine (MEA) for post-combustion CO2 capture of exhaust gas from a natural ...
    • Effective Concepts for Supplying Energy to a Large Offshore Oil and Gas Area under Different Future Scenarios 

      Riboldi, Luca; Cheng, Xiaomei; Farahmand, Hossein; Korpås, Magnus; Nord, Lars O. (Journal article; Peer reviewed, 2017)
      Different possibilities were assessed to supply energy to a large offshore oil and gas area in the North Sea. The concepts studied involved: (i) onsite power generation by means of simple gas turbine cycles, (ii) full ...
    • Effects of CO2-Absorption Control Strategies on the Dynamic Performance of a Supercritical Pulverized-Coal-Fired Power Plant 

      Gardarsdóttir, Stefanía Ósk; Mocholí Montañés, Rubén; Normann, Fredrik; Nord, Lars O.; Johnsson, Filip (Journal article; Peer reviewed, 2017)
      This work investigates the interactions that occur between a supercritical pulverized-coal-fired power plant and a downstream CO2-absorption process during load changes in the power plant by linking the dynamic models of ...
    • Efficiency Correlations for Off-design Performance Prediction of ORC Axial-flow Turbines 

      Pili, Roberto; Siamisiis, Nikolaos; Agromayor, Roberto; Nord, Lars O.; Wieland, Christoph; Spliethoff, Hartmut (Chapter, 2019)
      Organic Rankine Cycle (ORC) power systems are efficient and cost-effective to convert heat from low/medium temperature heat sources into electrical or mechanical power. Depending on the time behaviour of the heat and cold ...
    • Energy optimization of offshore gas installation 

      Ramadan, Adel (Master thesis, 2021)
      The attempt to reduce the environmental impact of offshore gas installations has been the main driver for research in process energy efficiency and energy supply concepts. On the one hand, offshore gas processing is an ...
    • Energy utilization from deep geothermal sources 

      Ommedal, Daniel (Master thesis, 2018)
      Recently, heat extraction from supercritical water (i.e. high pressure and high temperature) has received significant attention. Supercritical water from aquatic reservoirs several kilometers below the surface are led to ...

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