Blar i Institutt for energi og prosessteknikk på tittel
Viser treff 2178-2197 av 4152
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Investigation of R744 refrigeration system for supermarkets and the possibility of integrating a cold thermal energy storage
(Master thesis, 2021)Denne rapporten oppsummerer arbeidet som er gjort for masteroppgaven våren 2021. Rapporten er en videreføring av forprosjektet skrevet høsten 2020. Temaet for rapporten er CO2-kjølesystemer for supermarkeder og muligheten ... -
Investigation of Rate Capability and Mass Transfer Dynamics in Lithium-ion Batteries
(Master thesis, 2023)Det forventes at litiumionebatterier kommer til å ha en betydelig stor del av å oppnå netto nullutslippet under den grønne omstillingen verden i dag står ovenfor. Det er nødvendig å utforske nye og mer bærekraftige ... -
Investigation of seal technology for Francis turbine
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:50, Doctoral thesis, 2012)Leakage loss and disk friction loss caused by the clearance gap flow at the back of a runner have a major impact on the efficiency of hydraulic turbines. Accordingly, it is extremely important to develop and improve the ... -
Investigation of sediment erosion phenomenon for different blade angle distribution in Francis runner
(Peer reviewed; Journal article, 2021)Wear and tear of hydraulic turbine due to sediment erosion is one of the major problems in hydropower plants located in the Himalayan and Andes regions. High sediment concentration in water of such areas wears down the ... -
Investigation of Small Scale Solar Concentrating Parabolic Dish with Heat Storage: [Low to Medium Temperature Applications]
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:312, Doctoral thesis, 2011)This PhD thesis focuses on the development and testing of a small scale concentrating parabolic dish with heat storage for low to medium temperature applications. The system consists of a parabolic dish solar concentrator ... -
Investigation of suction capability of a centrifugal pump impeller
(Master thesis, 2021)Sentrifugalpumper er en turbomaskin, hvor løpehjulet øker trykket i væsken. Den første kjente prototypen for en sentrifugalpumpe eksisterte allerede på 1400-tallet. Det har vært en konstant utvikling fra den første kjente ... -
Investigation of terrain effects with respect to wind farm siting
(Doctoral Theses at NTNU, 1503-8181; 2009:199, Doctoral thesis, 2009)The turbulent flow above complex and generic terrain has been investigated in a wind tunnel. The objective was to generate a test case for numerical models, and to investigate flow above complex terrain with a view to wind ... -
Investigation of the effect of indoor environment on hypothermia and energy consumption in operating rooms
(Master thesis, 2021)Årlig får rundt 3.1% av pasienter ved norske sykehus infeksjoner som oppstår i forbindelse med operasjoner (SSI) (St.Olavs, 2019). Flere faktorer vil forebygge infeksjoner, men det er essensielt å holde pasienten i normotermi ... -
Investigation of the Flow through the Runner of a Cross-Flow Turbine
(Master thesis, 2009)The cross-flow turbine is unique due to the generation of power during two stages. The water flows through the rectangular cross-section nozzle and enters the runner, where the first stage power is generated. The water ... -
The investigation of the influence of thermal plume and breathing on sleeping microenvironment
(Peer reviewed; Journal article, 2021)Most of humans’ lifetime was spent indoor, especially in bedroom. Thus, understanding the characteristics of the sleep microenvironment is a prerequisite for better control and improvement of our sleeping environment. This ... -
Investigation of the Model Structure for Low-Order Grey-Box Modelling of Residential Buildings
(Chapter, 2019)Model Predictive Control (MPC) is a key technology to activate the building energy flexibility. A reliable control-based model should be developed for each specific building. The structure of grey-box models is usually ... -
Investigation of the Numerical Methodology of a Model Wind Turbine Simulation
(Journal article; Peer reviewed, 2018)The present work aims to investigate different methodologies for the numerical simulation of an upwind three-bladed wind turbine; which is supposed to be a base model to simulate icing in cold climate windmills. That is a ... -
Investigation of the relationship between water quality variations and cavitation occurence in power plants
(Doctoral thesis at NTNU;2016:26, Doctoral thesis, 2016)Lab experiments on clean water samples have revealed that water may withstand large tension; a state which could be explained as negative pressure, without occurrence of cavitation. At the same time, one struggles to ... -
Investigation of the structure of oxy-fuel flames using Raman laser diagnostics
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:166, Doctoral thesis, 2012) -
Investigation of the Unsteady Pressure Pulsations in the Prototype Francis Turbines -Part 1: Steady State Operating Conditions
(Journal article, 2018)Hydropower is one of the most reliable renewable sources of electricity generation. With high efficiency and good regulating capacity, hydropower has the ability to meet rapid changes in power demand. Large investments in ... -
Investigation of the unsteady pressure pulsations in the prototype Francis turbines during load variation and startup
(Journal article; Peer reviewed, 2017)This work investigates the unsteady pressure fluctuations in two prototype Francis turbines during load variation and start-up. Although hydraulic turbines are expected to experience such events over their lifetime, the ... -
Investigation of Thermopressor with Incomplete Evaporation for Gas Turbine Intercooling Systems
(Peer reviewed; Journal article, 2023)One of the promising ways to increase fuel and modern gas turbine energy efficiency is using cyclic air intercooling between the stages of high- and low-pressure compressors. For intercooling, it is possible to use cooling ... -
Investigation of transcritical CO2 vapour compression systems by simulation and laboratory experiments
(Doktoravhandlinger ved NTNU, 1503-8181; 141, Doctoral thesis, 2002)The thesis presents the use of simulation tools and experimental data for investigation of various aspects of the transcritical CO2 vapour compression cycle. This is done through three papers, the first on design and ... -
Investigation of unsteady flow in the vaneless gap between impeller and diffusor.
(Master thesis, 2016)I denne oppgaven er det undersøkt hvorvidt vibrasjoner i en vertikalsentrifugalpumpe stammer fra sekundærstrømninger i gapet mellom impellerog diffusor. En model av dette gapet ble laget ut fra arbeidstegninger overpumpen ...