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Partial discharge (PD) measurement in a needle to plane gap is suggested by IEC used for ranking dielectric liquids. This paper investigates PD behavior in eight liquids using a 20 mm ac stressed needle to plane gap. Parameters varied were tip radius, frequency and voltage. Both discharge phase...

For introducing power converters at ambient pressure at large sea depths, dielectric liquids are proposed as insulation for power electronic converters. This paper presents statistical analysis of short time tests of partial discharge and breakdown voltage on the trench between metallized edges of...

This reports sums up the research on green shipping from the SFI Smart Maritime programme and associated projects [↗]. The report presents the essence of research at NTNU and SINTEF Ocean to inspire and advise ship owners, policy makers and stakeholders. This report was written in 2022 based on...

The Norwegian fishing industry is facing increasing pressure to find more sustainable energy solutions. In response to this, a modeling and simulation based case study of a representative Norwegian pelagic trawler/purse seiner is presented to evaluate the emission reduction potential of...

Chatbots are taken up as part of digital government service provision. While the success of chatbots for this purpose depends on these being accepted by their intended users, there is a lack of knowledge concerning user perceptions of such chatbots and the implications of these for intention to use...

This report has been commissioned by the Norwegian Directorate for Cultural Heritage with the aim of providing an overall picture of the environmental significance of the reuse of existing buildings. The approach used has involved a systematic assessment and meta-analysis of life cycle assessments...

To facilitate operation of power electronics for subsea operation at ambient pressure components have to be submerged in a liquid. Equipment and schemes for testing of long term properties have been developed. Several techniques were used to investigate compatibility between a silicone gel and...

Initiation of partial discharges at the highly stressed regions of an Insulated Gate Bipolar Transistor (IGBT) can lead to degradation of the insulation and eventual total breakdown of the system. In this work, an experimental setup has been designed for the study of partial discharges (PDs) under...

A significant quantity of sensors distributed throughout the natural gas pipeline are susceptible to errors. Timely diagnosis of sensor faults in such scenarios holds great significance in averting catastrophic failures. This paper proposes a novel approach termed as model-based multi-sensor fault...

Water is an important enemy of an electric insulation system. Water vapour can be absorbed by electrical insulation materials (liquids or solid) and migrate in between the materials to achieve the same relative humidity equilibrium everywhere. Water can reduce withstand voltage of the insulation...

One can elucidate integrability properties of ordinary differential equations (ODEs) by knowing the existence of second integrals (also known as weak integrals or Darboux polynomials for polynomial ODEs). However, little is known about how they are preserved, if at all, under numerical methods. Here...