Blar i Institutt for energi og prosessteknikk på tittel
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Transcritical R744 refrigeration systems for supermarket applications: Current status and future perspectives
(Journal article; Peer reviewed, 2018)Visible signs of climate change call for urgent actions on food retail industry, since such a sector is characterized by an abundant carbon footprint. Being CO2 (or R744) recognised across the world as the most promising ... -
Transforming conventional hydropower plants into pumped storage by turbine replacement
(Doctoral theses at NTNU;2024:207, Doctoral thesis, 2024)While the global community has started to realize the impact of the climate changes, the global temperatures are rising, extreme weather occurs more frequently and certain species are struggling to adapt. To slow down the ... -
Transforming Our World: Interdisciplinary Insights on the Sustainable Development Goals
(Research report, 2023) -
Transient analysis of wet gas compression systems
(Doctoral theses at NTNU;2019:159, Doctoral thesis, 2019)The demand for oil and gas remains high, and changing market conditions require innovative solutions. Development of compression technology tailored for subsea oil and gas production can contribute significantly to ... -
Transient CFD-analysis of a high head Francis turbine
(Master thesis, 2014)The purpose of the present work has been to investigate how well transformation methods work as a method to get realistic inlet boundary conditions to a draft tube without using excessive amounts of computational resources. ... -
Transient Compressor System Analysis
(Master thesis, 2019)Det pågåande arbeidet mot ein meir kostnadseffektiv og miljøvennleg olje- og gassindustri har ført til visjonen om undervassfabrikkar og utviklinga av våtgass kompressorsystem. Erfaringa med slike typar system er fortsatt ... -
Transient dynamikk i gasstransport
(Master thesis, 2011)Beregningsmodeller som i dag brukes til prediksjon og overvåkning av gasstransport, er stort sett basert på 1 dimensjonale betraktninger. Friksjonsfaktoren som brukes i disse modellene er gjerne av typen Colebrook-White, ... -
Transient Flow in Gas Transport
(Master thesis, 2011)Transport of natural gas to continental Europe and UK is a large portion ofNorwegian petroleum industry. The gas is mainly transported undersea inlarge-scale transport pipelines. Amount of transported gas is currently ... -
Transient friction in pressurized pipes; the water hammer phenomenon
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:135, Doctoral thesis, 2010)The friction in non-stationary flow is an intriguing and interesting phenomenon. Many types of non-stationary flow exist, and the friction involved in these flows is in many cases significantly different from the steady ... -
Transient heat production and release profiles for wood stoves
(Journal article; Peer reviewed, 2018)Combustion of wood logs in wood stoves and fireplaces occurs through a so-called batch combustion process, i.e. it is a highly transient process where most parameters change during the combustion cycle. This results in ... -
Transient Heat Transfer in Boreholes with Application to Non-Grouted Borehole Heat Exchangers and Closed Loop Engineered Geothermal Systems
(Doctoral thesis at NTNU;2016:76, Doctoral thesis, 2016)This thesis concerns heat transfer processes in single boreholes and systems of boreholes. The thesis is divided in two parts of which the first considers borehole heat exchangers (shallow geothermal energy), and the ... -
Transient LDV-measurements in the draft tube of a high head Francis turbine
(Master thesis, 2014)Francis-99 is a series of upcoming workshops aimed at determining the state of the art of high head Francis turbine simulations. The scope of this essay is to provide empirical data to serve as validation for the CFD ... -
Transient Modelling of Hydropower Plants
(Master thesis, 2016)Any changes of the volume flow through a turbine gives acceleration or deceleration of the masses of water in the penstock. This induces dynamic pressure changes in front of the turbine. A pressure transient must be ... -
Transient performance of combined cycle power plant with absorption based post-combustion CO2 capture: dynamic simulations and pilot plant testing
(Doctoral theses at NTNU;2018:168, Doctoral thesis, 2018)The thesis presents transient performance analysis of chemical absorption processes for reducing CO2 emissions from natural gas combined cycle power plants (NGCCs), which can contribute to reduce greenhouse gas emissions ... -
Transient Thermo-Acoustic Responses of Methane/Hydrogen Flames in a Pressurized Annular Combustor
(Peer reviewed; Journal article, 2022)The present article experimentally investigates the triggering and transient growth of azimuthal instabilities in a pressurized laboratory-scale annular combustor featuring 12 methane/hydrogen flames, as the equivalence ... -
Transient wave resistance upon a real shear current
(Journal article; Peer reviewed, 2018)We study the waves and wave-making forces acting on ships travelling on currents which vary as a function of depth. Our concern is realism; we consider a real current profile from the Columbia River, and model ships with ... -
Transiente olje-vann strømningsforsøk
(Master thesis, 2009)Denne masteoppgaven er i all hovedsak rettet mot å ekstrahere eksperimentelle data på olje-vann flushing, begge i væskefase. Det vil også gjøres en evaluering på hvor godt flerfasesimulatoren OLGA 6.0 klarer å reprodusere ... -
Transition between coalescence and bouncing of droplets on a deep liquid pool
(Journal article; Peer reviewed, 2011)This study focused on the bouncing of sub-millimetric droplets (below 0.7 mm) of three different fluids, distilled water, technical ethanol and 1-propanol on a deep liquid pool of the same fluids. Four different flow regimes ... -
Transition to Large Scale Use of Hydrogen and Sustainable Energy Services and nonlinearity: Choices of technology and infrastructure under path dependence, feedback
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:71, Doctoral thesis, 2004)We live in a world of becoming. The future is not given, but forms continuously in dynamic processes where path dependence plays a major role. There are many different possible futures. What we actually end up with is ... -
Transition to the 4th generation district heating-possibilities, bottlenecks, and challenges
(Journal article; Peer reviewed, 2018)The 4th generation district heating (DH) will be available in the coming years. However, the transition from the current 2nd or 3rd generation DH is a challenging task. This article reviewed the technical issues associated ...