Blar i NTNU Open på forfatter "Nord, Lars O."
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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 ... -
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 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 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 ... -
Exergy Analysis for Combined Heat and Power (CHP) Plants
Rúa, Jairo; Nord, Lars O. (Chapter, 2018)Combined heat and power plants are an efficient technology for waste heat recovery applications where both heat and power are demanded. Steam Rankine cycles are normally utilized when high temperature exhaust streams are ... -
Experimental results of transient testing at the amine plant at Technology Centre Mongstad: Open-loop responses and performance of decentralized control structures for load changes
Mocholí Montañés, Rubén; Flø, Nina Enaasen; Nord, Lars O. (Journal article; Peer reviewed, 2018)Flexible operation of combined cycle thermal power plants with chemical absorption post combustion CO2 capture is a key aspect for the development of the technology. Several studies have assessed the performance of ... -
Flexible operation of combined cycle gas turbine power plants with supplementary firing
Encabo Caceres, Ines; Mocholí Montañés, Rubén; Nord, Lars O. (Journal article; Peer reviewed, 2018)This article covers the use of supplementary firing in a gas-combined cycle power plant when high flexibility is required depending on the penetration of variable renewable energies and under different gas turbine loads. ...