Blar i Institutt for energi og prosessteknikk på tittel
Viser treff 2762-2781 av 4125
-
Objective Function Evaluation for Optimization of an Amine-Based Biogas Upgrading and Liquefaction Process
(Peer reviewed; Journal article, 2022)Conventionally, liquefied biomethane (LBM) is produced through biogas upgrading followed by a liquefaction process. In the present study, a detailed model for an LBM production plant including amine-based biogas upgrading ... -
Oblique waves on a vertically sheared current are rotational
(Journal article; Peer reviewed, 2016)In the study of surface waves in the presence of a shear current, a useful and much studied model is that in which the shear flow has constant vorticity. Recently it was shown by Constantin (2011) that a flow of constant ... -
Observation of surface wave patterns modified by sub-surface shear currents
(Journal article; Peer reviewed, 2019)We report experimental observations of two canonical surface wave patterns – ship waves and ring waves – skewed by sub-surface shear, thus confirming effects predicted by recent theory. Observed ring waves on a still surface ... -
Occupancy Pattern in Office Buildings: Consequences for HVAC system design and operation
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:37, Doctoral thesis, 2012)The main objectives with the work presented in this thesis have been: (a) to contribute to an increased understanding of the consequences that the occupancy pattern can have on the indoor climate and for Heating, Ventilation ... -
Occupant behaviour in buildings - electricity consumption in residential buildings
(Master thesis, 2018)Energy-related occupant behaviour has a major impact on the energy use in buildings, and occupant behaviour is also a key parameter for building design optimization, energy diagnosis, performance evaluation and building ... -
Occupant-centric miscellaneous electric loads prediction in buildings using state-of-the-art deep learning methods
(Peer reviewed; Journal article, 2020)Buildings have emerged as one of the dominant sectors when it comes to worldwide energy consumption. While a large portion of this consumption is due to the Heating, Ventilation, and Air Conditioning (HVAC) loads, a ... -
Occupants’ perceptions and responses to energy use and indoor climate from the newly occupied passive houses in Norway: a questionnaire survey
(Chapter, 2016)This study aims to improve our knowledge about interactions between occupant behaviour and building systems. Individual occupant perceptions and responses to energy use and indoor climate were investigated by way of a case ... -
Off the beaten path: dispersive wave-current interactions on shear flows, and path-following methods
(Doctoral theses at NTNU;2020:46, Doctoral thesis, 2020)The focus of this work has been the influence of depth-dependent currents on the properties of dispersive water waves, in furtherance of recent work by Ellingsen, et al. This has primarily comprised the development of: ... -
Off-design Simulations of Offshore Combined Cycles
(Master thesis, 2012)This thesis presents an off-design simulation of offshore combined cycles. Offshore installations have a substantial power demand to facilitate the oil and gas production. To cover this need of power almost all the platforms ... -
Offshore Power Plants Integrating a Wind Farm: Design Optimisation and Techno-Economic Assessment Based on Surrogate Modelling
(Journal article; Peer reviewed, 2018)The attempt to reduce the environmental impact of the petroleum sector has been the driver for researching energy efficient solutions to supply energy offshore. An attractive option is to develop innovative energy systems ... -
Offshore Rankine Cycles
(Master thesis, 2012)The title of the thesis - "Offshore Rankine Cycles" - is very general and cover a large range of engineering fields, e.g. thermodynamic cycles (Rankine, ORC, Brayton, Kalina, etc.), mechanical equipment (gas/steam turbine, ... -
Oil Based Solar Concentrator with Heat Storage
(Master thesis, 2016)A test system for storing solar thermal energy in the form of hot oil is constructed and tested. The motivation for the work is the need for a thermal energy storage which provides heat, from solar concentrators, for food ... -
Oil-free turbocompressors for CO2 as working fluid
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:299, Doctoral thesis, 2013)Compressing equipment can be found in almost every area of our industrialized society. Compressors drive our fridges, air conditioning systems and enable turbine engines to propel the aircrafts we use when going for holidays ... -
Olje-vann separasjon i rør
(Master thesis, 2012)Transiente motstrøms tyngdekrafts-drevne olje-vann strømningsforsøk ble gjort i en to meter lang lukket plexiglass sylinder. Et enkelt eksperimentelt oppsett baser på visuelle observasjoner ble laget med formål for disse ... -
Olje-vann separasjon i rør
(Master thesis, 2012)Transiente motstrøms tyngdekrafts-drevne olje-vann strømningsforsøk ble gjort i en to meter lang lukket plexiglass sylinder. Et enkelt eksperimentelt oppsett baser på visuelle observasjoner ble laget med formål for disse ... -
On exergy analysis of industrial plants and significance of ambient temperature
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:80, Doctoral thesis, 2011)The exergy analysis has been a relatively mature theory for more than 30 years. However, it is not that developed in terms of procedures for optimizing systems, which partly explains why it is not that common. Misconceptions ... -
On Flywheel Batteries
(Bachelor thesis, 2023)Energilagringssystemer forbedrer effektiviteten i elektriske systemer under ubalanser mellom tilbud og etterspørsel, og bidrar til å øke nettverkets stabilitet og kvalitet. De reduserer ujevnheten i fornybar energiproduksjon ... -
On heat transfer in Bödewadt flow
(Journal article, 2017)Heat transfer in revolving Bo¨dewadt flow above a planar surface has been considered. We have shown that a similarity solution of the thermal energy problem does not exist as long as the surface is impermeable. The failure ... -
On interface transfer terms in two-fluid models
(Journal article; Peer reviewed, 2012)In this note we consider two-fluid models based on the usual formulations for conservation of mass, total momentum and total energy. We present some potentially useful general relationships between the interface exchange ... -
On isotropic turbulence in the dark fluid universe
(Journal article; Peer reviewed, 2011)As a first part of this work, experimental information about the decay of isotropic turbulence in ordinary hydrodynamics, is used as input in FRW equations in order to investigate how an initial fraction f of turbulent ...