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Denne rapporten beskriver første del av utredningen "Vurdering av kraftsituasjonen 2021‐2022", som SINTEF Energi utfører på oppdrag fra OED. Hovedfokus i denne delen av utredningen er på magasindisponering høsten 2021. Vi har sammenliknet observert magasindisponering i Sør‐Norge fra uke 36 og ut...

Denne rapporten beskriver utprøving av en foreslått metode for hydromorfologisk klassifisering av elver i utvalgte vannforekomster. Metoden inneholder bruk av 8 indikatorer for morfologi, 4 indikatorer for barrierer og 8 indikatorer for hydrologi. Utprøvingen har medført at metoden foreslås...

This paper addresses challenges with modeling of heat transfer phenomenon for cables in duct or pipes when applying a numerical solution. Heat transport mechanisms between the cable and pipe surfaces are conduction, convection and radiation. Numerical calculation of convection when applying a finite...

This paper presents a novel approach, based on the theory of hyperplanes, for mode identification of linear systems. The proposed approach can operate on either a set of ordinary differential equations (converted to diagonal form, if needed) or a set of partial fractions derived from a synthesized...

Future refrigeration systems for cruise ships are subject to increasingly strict restrictions on refrigerants and should also contribute to increasing the overall energy efficiency of the ship. Against this background, the present diploma thesis deals with the design of a CO₂ refrigeration system to...

Curtailed operation -when a wind farm is requested by the grid operator to produce less than what it could- is expected to become more and more common as the share of renewables in the energy market increases. In these conditions, wind farm control enables de-rating and hence offloading specific...