Browsing Fakultet for ingeniørvitenskap (IV) by Title
Now showing items 6178-6197 of 23007
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Dynamic modelling and simulation of the Graz Cycle for a renewable energy system
(Peer reviewed; Journal article, 2024)Critical atmospheric carbon dioxide levels and, in response, an increasing shift toward variable renewable energy sources causes the need of transient operation for thermal power plants coupled with carbon capture and ... -
Dynamic modelling and validation of an air‐to‐water reversible R744 heat pump for high energy demand buildings
(Peer reviewed; Journal article, 2021)This paper presents a reversible heat pump based on CO2 as the refrigerant, able to provide heating, cooling, and domestic hot water to high energy demand buildings. The unit was developed and tested under the EU H2020 ... -
Dynamic Modelling of Fuel Cell Systems for Electric Propulsion
(Chapter, 2021)In this paper, a dynamic model is developed for hybrid electric powertrains with fuel cell and batteries. The hybrid powertrain is considered mainly for marine propulsion with dynamic load, although the study can be ... -
Dynamic Modelling of Ice Rubble and Extrusion Loads on Offshore Wind Turbines in Crushing Interaction
(Master thesis, 2022)For å imøtekomme den økende etterspørselen etter fornybar energi, installasjon av ny havvind energikapasiteten øker i mange land. Nye prosjekter vil bli foreslått for vann i hvilken flytende (hav)is er en vanlig forekomst ... -
Dynamic modelling of local low-temperature heating grids: A case study for Norway
(Journal article; Peer reviewed, 2017)Today's district heating (DH) networks in Norway are 2nd and 3rd generation systems, with supply temperatures ranging from 80 to 120 °C. In new developments, it is desirable to shift to 4th generation, low-temperature ... -
Dynamic modelling of national dwelling stocks: Understanding phenomena of historical observed energy demand and future estimated energy savings in the Norwegian dwelling stock
(Doctoral theses at NTNU;2017:36, Doctoral thesis, 2017)Residential buildings are responsible for 24% of the global final energy consumption, and the housing sector is important for future mitigation of greenhouse gases. Scenario models are important tools for estimation of the ... -
Dynamic modelling of the thermal response enhanced by sloshing in marine LNG fuel tanks
(Journal article; Peer reviewed, 2018)This paper investigates the thermal response in marine liquefied natural gas (LNG) fuel tanks by experiments and modelling. The aim of this work is to develop phenomenological models that can predict the rapid pressure ... -
Dynamic Modelling, Simulation and Visualization of Marine Crane Operations on DP Vessels
(Master thesis, 2015)The research presented in this thesis is based on the idea that to find a better method of modelling, simulation and controlling the dynamic mechanical systems by using Lagrange method and bond graph approach. Based on the ... -
Dynamic Modelling, Vibration and Fatigue Analysis of Slow Rotating Propulsion Systems
(Master thesis, 2018)In recent years, shipping has experienced a technical transformation motivated by its impact on the environment and the desire to reduce operational costs. Engines with lower power ranges and slow steaming are two examples. ... -
Dynamic Models of Fixed Capital Stocks and Their Application in Industrial Ecology
(Journal article; Peer reviewed, 2014)Industrial assets or fixed capital stocks are at the core of the transition to a low-carbon economy. They represent substantial accumulations of capital, bulk materials, and critical metals. Their lifetime determines the ... -
The dynamic nature of self-excited azimuthal modes in annular combustors
(Doctoral theses at NTNU;2021:209, Doctoral thesis, 2021) -
Dynamic optimization of control setpoints for an integrated heating and cooling system with thermal energy storages
(Journal article; Peer reviewed, 2019)Energy systems for buildings and neighborhoods are expected to become more complex and flexible. Advanced control strategies are required to exploit the full potential of this flexibility and are especially important for ... -
Dynamic optimization of railway catenary system by turning unwanted lumped-mass into tuned-mass
(Chapter, 2017)The railway catenary is suspended to its supports with droppers, clamps and oth-er fittings. These lumped-masses are made light and small to minimize disturbances. The mass-es cannot be completely removed but can be adjusted ... -
Dynamic Parameter Investigation of a Full Scale Laboratory Overhead Contact Line Section Model
(Master thesis, 2015)In the dynamic parameter investigation of a full scale laboratory section model of a overhead contact line, the effects of tension force and the effect of removing a dropper is of interest. The thesis present the results ... -
Dynamic Performance of High-Speed Railway Overhead Contact Line Interacting With Pantograph Considering Local Dropper Defect
(Peer reviewed; Journal article, 2020)The local dropper defect is the most common fault in the early service stage of the overhead contact line (OCL) system. The plastic deformation and loose of a dropper may cause the variation of the contact line height, ... -
Dynamic Positioning in Extreme Sea States: Improving Operability Using Hybrid Design Methods
(Master thesis, 2014)This thesis investigates the performance of high-level hybrid dynamic positioning (DP) algorithms in extreme environmental conditions. A vessel in DP uses the thrusters as the sole means of keeping position in wind, waves ... -
Dynamic Positioning of Marine Vessels in Ice
(Doctoral thesis at NTNU;2016:168, Doctoral thesis, 2016)This thesis is a collection of papers focusing on various aspects of dynamic positioning of marine vessels in ice. Most emphasis is put on the dynamic broken, or managed, sea-ice environment where pioneering operations ... -
Dynamic Positioning of Surface Effect Ships using vent valve actuation
(Master thesis, 2019)For en offshore-arbeidstaker i olje- og gassindustrien er helikoptertransporten til installasjonen den aktiviteten knyttet til den høyeste risikoen. Et alternativ til personelltransport ved hjelp av helikopter er å bruke ... -
Dynamic Positioning using Deep Reinforcement Learning
(Master thesis, 2020)Classic methods for Dynamic Positioning (DP) of surface vessels often consists of first calculating desired forces and moments to exert on the vessel by using a motion controller, followed by a thrust allocation scheme for ... -
Dynamic Positioning using Deep Reinforcement Learning
(Journal article; Peer reviewed, 2021)This paper demonstrates the implementation and performance testing of a Deep Reinforcement Learning based control scheme used for Dynamic Positioning of a marine surface vessel. The control scheme encapsulated motion control ...