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A Lagrangian Slug Capturing Scheme for Gas-Liquid Flows in Pipes
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:145, Doctoral thesis, 2007)In this thesis a new Lagrangian numerical scheme for the simulation of gas-liquid flows in pipelines is presented. Based on an approximate two-fluid model, this new scheme, called LASSI (Lagrangian Approximate Scheme for ... -
A Life Cycle Assessment of a waste management system introducing sorting of food waste and a central sorting facility
(Master thesis, 2022)EU krever at alle medlemsland skal sortere matavfall og øke resirkulering til seksti prosent innen 2030. I Norge ønsker Fredrikstad kommune å finne løsninger for å nå disse målene. Denne oppgaven undersøker hva slags ... -
A life cycle assessment of Norwegian wild-caught cod with demersal trawl and set gillnet with a focus on plastic
(Master thesis, 2023)Akkumulering av marine plast utgjør en økende trussel i havet, og medfører svekkelse, lemlestelse og død hos millioner av marine dyr årlig. Miljøtrusselen kan knyttes til fiskeredskaper, da en betydelig andel består av ... -
A Life Cycle Assessment of the Passenger Air Transport System Using Three Flight Scenarios
(Master thesis, 2013)The commercial aviation industry is drawing more and more attention from governments, international organizations and industry stakeholders as calls for improved environmental performance escalate and global concern to ... -
A Machine Learning Approach to Correlation Development Applied to Fin-Tube Bundle Heat Exchangers
(Journal article; Peer reviewed, 2018)Heat exchanger designers need reliable thermal-hydraulic correlations to optimize heat exchanger designs. This work combines an adaptive sampling method with a Computational Fluid Dynamics (CFD) simulator to obtain increased ... -
A method to extract fishers’ knowledge (FK) to generate evidence for sustainable management of fishing gears
(Journal article; Peer reviewed, 2019)The dangerous effects of Abandoned, Lost or Discarded Fishing Gears (ALDFG) is documented in the literature. However, there exists an overall lack of understanding in quantifying the pollution loads of fishing gears (FG) ... -
A Methodology for Integrated, Multiregional Life Cycle Assessment Scenarios under Large-Scale Technological Change
(Journal article; Peer reviewed, 2015)Climate change mitigation demands large-scale technological change on a global level and, if successfully implemented, will significantly affect how products and services are produced and consumed. In order to anticipate ... -
A modified homogeneous relaxation model for CO2 two-phase flow in vapour ejector
(Journal article; Peer reviewed, 2016)In this study, the homogenous relaxation model (HRM) for CO2 flow in a two-phase ejector was modified in order to increase the accuracy of the numerical simulations The two- phase flow model was implemented on the effective ... -
A multi-impact analysis of changing ICT consumption patterns for Sweden and the EU: Indirect rebound effects and evidence of decoupling
(Journal article; Peer reviewed, 2019)Information and Communication Technology (ICT) is one of the major areas of growth in consumption seen over the last two decades. The falling prices of ICT and increasing energy efficiency of ICT may lead to reduced spending ... -
A multi-regional soil phosphorus balance for exploring secondary fertilizer potential: the case of Norway
(Journal article; Peer reviewed, 2015)Phosphate rock is a non-renewable source of phosphorus (P) in mineral fertilizer and many countries need to use P fertilizer more efficiently in food production. This study explored the theoretical fertilizer potential of ... -
A Multimedia Hydrological Fate Modeling Framework To Assess Water Consumption Impacts in Life Cycle Assessment
(Journal article; Peer reviewed, 2018)Many new methods have recently been developed to address environmental consequences of water consumption in life cycle assessment (LCA). However, such methods can only partially be compared and combined, because their ... -
A Multiphase Pump Experimental Analysis
(Doctoral thesis at NTNU;2016:215, Doctoral thesis, 2016)This research project focuses on the characterization of the behaviour of a mixed-flow pump under off-design conditions and two-phase operation, in terms of performance degradation and instabilities. The recent multiphase ... -
A multiple-resolution scheme for DNS of scalar fields in turbulent flows
(Master thesis, 2022)For turbulente strømninger med tilstedeværelse av et aktivt eller passivt skalarfelt, tilsvarende Kolmogorov-skalaen η, er de minste skalaene hvor skalarkonsentrasjon transporteres definert som Batchelor-skalaen λ_B. Når ... -
A new approach to the identification of high-potential materials for cost-efficient membrane-based post-combustion CO2 capture
(Journal article; Peer reviewed, 2018)Developing “good” membrane modules and materials is a key step towards reducing the cost of membrane-based CO2 capture. While this is traditionally being done through incremental development of existing and new materials, ... -
A new Design of a Francis Turbine in order to reduce Sediment Erosion
(Master thesis, 2010)This Master Thesis is about the sand erosion challenges with the Francis turbines. The background for studying this subject is the fact that the sand erosion problem is a very negative factor for the development of new ... -
A New Extended Corresponding States Equation of State for Modelling CO2-Water Thermodynamics - A Compromise for CFD
(Doctoral theses at NTNU;2017:264, Doctoral thesis, 2017)This PhD work is part of the CO2 Dynamics project in collaboration with Sintef Energy. We investigated the importance of accurate modelling of CO2 thermodynamic properties for process design. The study was conducted for ... -
A new paradigm in process synthesis focus on design of power plants and industrial processes integrated with CO2 capture
(Journal article; Peer reviewed, 2016)Process synthesis methods have only recently been applied for the design of CO2 capture systems. At the crux of the CO2 capture process is a separation technology (sorbent, membrane or phase separation) applied to CO2/N2, ... -
A New Technical Concept for Water Management and Possible Uses in Future Water Systems
(Journal article; Peer reviewed, 2019)A new degree of freedom in water management is presented here. This is obtained by displacing water, and in this paper is conceptually explained by two methods: using an excavated cavern as a container for compressed air ... -
A Nonsmooth Approach to Modeling and Optimization - Application to Liquefied Natural Gas Processes and Work and Heat Exchange Networks
(Doctoral theses at NTNU;2020:54, Doctoral thesis, 2020)Despite their implicit presence in many process systems engineering applications, nonsmooth functions have repeatedly been shunned due to the existence of nondifferentiable points that cause issues for numerical solvers ... -
A Norwegian ZEB-definition embodied emission
(ZEB Project report;17-2014, Research report, 2014)