Browsing Institutt for energi og prosessteknikk by Title
Now showing items 2964-2983 of 4152
-
Part load performance of PEM fuel cell and electrolyser stacks in hybrid energy system for offshore application
(Chapter, 2022)Global warming and associated climate change are ongoing processes worldwide, behind which anthropogenic greenhouse gas emissions play the main role. Renewable energy sources integrated in hybrid energy systems (HES) are ... -
A part-load analysis and control strategies for the Graz Cycle
(Peer reviewed; Journal article, 2022)Carbon capture and storage (CCS) plays a uniquely important role in the future clean and dispatchable power generation portfolio to achieve the ambitious goals set at COP21. The Graz Cycle, a zero emission oxy-combustion ... -
Part-load efficiency boost in offshore organic Rankine cycles with a cooling water flow rate control strategy
(Peer reviewed; Journal article, 2022)Global concerns regarding greenhouse gas emissions and global warming have necessitated the speed up in using renewable energies and more efficient use of fossil fuels in the oil and gas industry. Harvesting gas turbine ... -
Part-load thermal efficiency enhancement in gas turbine combined cycles by exhaust gas recirculation
(Peer reviewed; Journal article, 2024)Gas turbine power plants are popular for offshore power generation due to high power density and their reliability. However, growing usage of renewable energies put gas turbines in a load following backup operation. These ... -
Particle Deposition From Geothermal Supercritical Steam
(Master thesis, 2021)Varmeutvinning fra dype varme geotermiske brønner kan føre til en størrelsesorden høyere effekt sammenlignet med konvensjonelle geotermiske brønner (Fridleifsson et al. 2003). Et slikt energipotensial kan imidlertid ikke ... -
Particle Erosion in Control Valves
(Doctoral theses at NTNU;2019:260, Doctoral thesis, 2019) -
Particle image velocimetry measurements in the vaneless space of a model Francis turbine under steady state operation
(Peer reviewed; Journal article, 2021)Two-dimensional, two component particle image velocimetry (PIV) measurements of the guide-vane wake and vaneless space for a high head Francis model turbine are presented. Measurements have been carried out with a fixed ... -
Particle segregation in turbulent Couette-Poiseuille flow with vanishing wall shear
(Journal article, 2017)Inertial particles dispersed in wall-bounded flows in pipes and channels are known to accumulate close to the walls. The segregation ability depends greatly on the inertia-selection effects of the near-wall quasi-coherent ... -
Particle suspensions in evolving Taylor-Green vortex flow
(Doctoral theses at NTNU;2022:319, Doctoral thesis, 2022)Particle-laden flow is a ubiquitous phenomenon, observed in both natural and engineering settings. Most of the studies have focused on studying particles in standard flow systems, such as homogeneous isotropic turbulence ... -
Particles in wall turbulence
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:15, Doctoral thesis, 2012)The overall objective of this doctoral thesis is to investigate how tiny particles are dispersed in a turbulent channel flow and how the fluid turbulence is modulated due to the presence of particles. Both spherical and ... -
Particulate matter-attributable mortality and relationships with carbon dioxide in 250 urban areas worldwide
(Journal article; Peer reviewed, 2019)Urban air pollution is high on global health and sustainability agendas, but information is limited on associated city-level disease burdens. We estimated fine particulate matter (PM2.5) mortality in the 250 most populous ... -
Path Exchange Method for Hybrid Life-Cycle Assessment
(Master thesis, 2009)To keep process-specificity while extending system boundaries hybrid techniques were developed allowing the micro structure of the important parts of a system to be revealed at the same time the entire economic system in ... -
Path-Following Method to Determine the Field of Values of a Matrix with High Accuracy
(Journal article; Peer reviewed, 2018)We describe a novel and efficient algorithm for calculating the field of values boundary, $\partial\textrm{W}(\cdot)$, of an arbitrary complex square matrix: the boundary is described by a system of ordinary differential ... -
Path-Following Methods for Calculating Linear Surface Wave Dispersion Relations on Vertical Shear Flows
(Journal article; Peer reviewed, 2020)The path-following scheme in Loisel and Maxwell (SIAM J Matrix Anal Appl 39(4):1726–1749, 2018) is adapted to efficiently calculate the dispersion relation curve for linear surface waves on an arbitrary vertical shear ... -
Pathways to low-cost clean hydrogen production with gas switching reforming
(Peer reviewed; Journal article, 2020)Gas switching reforming (GSR) is a promising technology for natural gas reforming with inherent CO2 capture. Like conventional steam methane reforming (SMR), GSR can be integrated with water-gas shift and pressure swing ... -
Pathways toward a carbon-neutral Swiss residential building stock
(Journal article, 2020)Current policies to reduce energy consumption and CO2 emissions associated with buildings focus on technological developments such as energy efficiency, renovation rates and renewable energies. While technological developments ... -
Patient specific numerical simulation of flow in the human upper airways
(Master thesis, 2016)In this master thesis, a patient specific computational fluid dynamics (CFD) \nomenclature{CFD}{Computational Fluid Dynamics} study has been done on the air flow in the human upper airways before and after surgical ... -
Patient Specific Numerical Simulation of Flow in the Human Upper Airways for Assessing the Effect of Nasal Surgery
(Lecture, 2017)The study is looking into the potential of using computational fluid dynamics (CFD) as a tool for predicting the outcome of surgery for alleviation of obstructive sleep apnea syndrome (OSAS). From pre- and post-operative ... -
Patient Specific Numerical Simulation of Flow in the Human Upper Airways for Assessing the Effect of Nasal Surgery
(Chapter, 2017)The study is looking into the potential of using computational fluid dynamics (CFD) as a tool for predicting the outcome of surgery for alleviation of obstructive sleep apnea syndrome (OSAS). From pre- and post-operative ...