This paper discusses the field application of the improved paper filter system used for non-intrusive monitoring of power transformer insulation contamination level. The filter has been applied to three transformer units. The first results indicated promising trend between the levels of the measured...
Dry-ice blockage in a CO2-solid-gas-flow-based ultra-low temperature cascade refrigeration system is investigated experimentally by a visualization test and a system study of the liquid CO2 blew into an expansion tube through a Throttle needle valve. The visualization test shows that dry ice...
This work presents the initial investigations of an Integrated Reforming Combined Cycle (IRCC) process with CO2 capture using a membrane reformer. A geometrically generic 1-dimensional model of a membrane reformer has been implemented in Matlab 7.9. This model includes detailed balance equations for...
This paper compares alternative methods for linear modeling of simulated time-domain responses by a rational approximation. The traditional approach based on autoregressive moving average (ARMA) is compared with two alternative approaches that have been introduced in recent years: Z-Domain Vector...
Norwegian seafood products are important export products with regard to volume and value. More than 400 trucks of fresh fish products are weekly transported from Norway to European countries. The traditionally chilled fish is packed in boxes filled with approximately 30% ice (equivalent to...
An industrial, automated superchilling process line needs to combine the requirement for gentle handling of a valuable raw material with demands for energy efficiency, high capacity and product quality. The results from the study of three alterative process lines for superchilled processing of fresh...
In a time of fewer resources and rising energy prices savings of primary energy is an important goal for the food industry. This study analyses the potential of cold thermal energy storage (CTES) applying an indirect carbon dioxide system to reduce the electrical power needed by the freezing plant...
When fiber optic probes were taken into use to record local hot-spots in windings and oil ducts, it was noticed that the hot-spot temperature rise over top-oil temperature due to load changes is a function depending on time as well as the transformer loading (overshoot time dependent function). This...
In an attempt to look at means for reduction of corrosion in boilers, combustion experiments are performed on demolition wood with kaolin as additive. The experiments were performed in a multi-fuel reactor with continuous feed of pellets and by applying staged air combustion. A total...
The mechanisms contributing to flame stabilization and blowout in a nitrogen-diluted hydrogen transverse jet in a turbulent boundary layer cross-flow (JICF) are investigated using three-dimensional direct numerical simulation (DNS) with detailed chemistry. Non-reacting JICF DNS were performed to...
Voltage quality monitoring has a key role within quality regulation providing data on the real situation either by continuous monitoring or by monitoring upon customer complaints or requests. This paper describes the current requirements [1] on monitoring of voltage disturbances in Norway...
In this work three fundamentally different modes of particle impaction on a cylinder in a cross flow is presented. Large particles impact on the cylinder in the so-called classical mode where the impaction efficiency is controlled by the particle inertia and the large scale fluid motions. For...
Overall the activities in 2011 have developed satisfactorily and in accordance with the project schedule. The wildlife and power-line corridor subproject is focusing the moose habitat use of the clear-felled area beneath a selected transmission-line section in Bangdalen, Nord-Trøndelag County...
Switching transient as one of the main transient phenomena in power systems have been simulated and measured in many studies. Since offshore wind farms have been integrated to power system only in recent years, the consequences of switching phenomena in offshore wind farms have not yet been...