English
norskBlar i utgivelsesdato Artikler, rapporter og annet (automasjon og prosessteknologi)
Viser treff 1-20 av 163
-
A field study of atmospheric icing analysis in a complex terrain of the high north
(Journal article; Tidsskriftartikkel; Peer reviewed, 2014-12)Analyses of atmospheric icing events hold the key for computing the significant parameters leading to icing load calculations. In the cold regions of the high north, atmospheric icing loads on structures become important when it comes to design and safety of infrastructures. Furthermore, icing load calculations over a certain period of time provide a vital input for designers to improve the ... -
Influence of local and regional air pollution on atmospheric measurements in Ny-Ålesund
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016)The Zeppelin observatory is a research station near the village Ny-Ålesund in Svalbard. The facility delivers data to international projects devoted to high data quality monitoring of the background air pollution in the Arctic. An approach for quantifying the influence of local and regional pollution on measurements that may be misinterpreted as long-range transported one, is presented here. The ... -
Integrated Oxyfuel Power Plant with Improved CO2 Separation and Compression Technology for EOR application
(Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-06-25)An integrated advanced supercritical coal-fired oxyfuel power plant with a novel cryogenic CO2 separation and compression technology for high purity CO2 to suit injection for enhanced oil recovery purposes is investigated. The full process is modelled in Aspen Plus® consisting of: an Air Separation Unit (ASU), an Advanced Supercritical Pulverised Fuel (ASC PF) power plant with a bituminous coal ... -
Ice Detection Experimentation Setup Using Infrared and Active Heating
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-07-24)The paper shows the possible implementation of Infrared (IR) ice detection technique. The experimental setup is implemented keeping in view of the marine icing phenomena over the ships and offshore structures. The detection mechanism is unique from the passive IR detection by introducing the active heating concept. The intervention of the active heating information inside the IR ice detection system ... -
Modeling Bottom-Up Visual Attention Using Dihedral Group D4
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-15)In this paper, first, we briefly describe the dihedral group D4 that serves as the basis for calculating saliency in our proposed model. Second, our saliency model makes two major changes in a latest state-of-the-art model known as group-based asymmetry. First, based on the properties of the dihedral group D4, we simplify the asymmetry calculations associated with the measurement of saliency. ... -
Review of marine icing and anti-/de-icing systems
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-17)The aim of this work is to review the phenomenon of icing in marine operations. The focus is on two main sources of icing, namely atmospheric and sea spray. The literature reveals that sea spray icing is the main contributor to marine icing. This work discusses the available ice accretion prediction models on ships and offshore structures. It also reviews the anti-/de-icing technologies that can be ... -
Modelled and observed sea-spray icing in Arctic-Norwegian waters
(Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-11-15)Hazardous marine icing is a major concern for ships operating in Arctic waters during freezing conditions. Sea spray generated by the interaction between a ship and ocean waves is the most important water source in these dangerous icing events. Although there exist several data sets with observations of ice accretion in conjunction with meteorological and oceanographic parameters, these data sets ... -
Detection of red dye in diesel oil using UV-absorption and silicon photo detector
(Conference object; Konferansebidrag, 2016-12-08)Developing a sensitive and effective instrument for detecting the presence of red dye in diesel fuel is very advantageous for governments in preventing tax loss by controlling illegal use of the diesel fuel. The objective of this work has been to investigate and develop an instrument to detect red dye in diesel, based on the principle of absorption. The peaks of absorption in red and pure diesel ... -
Scenario-based approaches for handling uncertainty in MPC for power system frequency control
(Journal article; Peer reviewed; Tidsskriftartikkel, 2017)A stochastic nonlinear model predictive controller (SNMPC) is designed for automatic generator control of a proxy of the Nordic power system, and it is compared with a multi-stage nonlinear model predictive controller (MNMPC). Both controllers are scenario based, but originate in two different disturbance modeling paradigms; stochastic and deterministic. A simulation study indicates that the two ... -
Study of the required thermal insulation (IREQ) of clothing using infrared imaging
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017)The sense of cold develops due to the increase in heat loss from a human body. Excessive cold can be a health hazard, since excessive heat loss from the body may result in hypothermia/frostbite. Decreased body temperature due to heat loss also affects the physical, manual and perceptive performance of individuals. Therefore, protective measures are taken through clothing that controls and regulates ... -
Fluorescent marking of roads in high-north
(Conference object; Konferansebidrag, 2017)The project objective is to investigate into luminescent coating materials that can be used in marking the roads in high-north. The idea of the project is not entirely new, and efforts have been worldwide to find an energy efficient solution to the street lights. Earlier work conducted in the Netherlands showed quite promising results. However, the challenges include weatherproofing the coat such ... -
State-of-the-art techniques in crack detection and utilizing innovative materials for the repair and maintenance of roads
(Conference object; Konferansebidrag, 2017)This work is looking into the issue of repairing and maintaining the roads using innovative materials in the Arctic region. We have conducted preliminary studies at UiT The Arctic University of Norway and found a suitable material that has potential to be applied on roads cracks or even coat the entire road. This is an ongoing work and has two main sections: 1) To investigate the suitable techniques ... -
Detection of Red Dye in Diesel Oil
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017)Developing a sensitive and effective instrument for detecting the presence of red dye in diesel fuel is very advantageous for governments in preventing tax loss by controlling illegal use of the diesel fuel. The objective of this work has been to investigate and develop an instrument to detect red dye in diesel, based on the principle of absorption. The peaks of absorption in red and pure diesel ... -
Fluid solid interaction simulation of CFRP shell structure
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017)This work attempts to model the dynamic behavior of Carbon Fiber Reinforced Polymer (CFRP) shell structure subjected to water shock wave to improve the results presented in the study by Khawaja et al., 2014. In the previous study, the real physical problem was simplified by decoupling the fluid and the structural phenomena, applying the recorded experimental fluid pressure load to the CFRP shell ... -
Study Of Wind Chill Effect and Thermal Insulation Using Infrared Imaging
(Conference object; Konferansebidrag, 2017)Tanveer Ahmad presented his findings on using Infrared Imaging to identify the wind chill-effect and insulation of winter clothing. He showed qualitatively that IR can detect the effects of wind chill and conducted experiments to obtain data with a view to establishing metrics which can be used to assess the effectiveness of survival gear. An unusual item that cropped up during the presentation was ... -
Monitoring of nitrogen oxides at Svalbard: measurements in Adventdalen
(Conference object; Konferansebidrag, 2017) -
Detection of Cracks and Potholes in Roads using Infrared Thermography
(Conference object, 2017)Many remote sensing techniques can be used to identify the cracks/voids on the road surfaces. The given research focuses on applying infrared thermography (IRT). IRT technology can detect features based on the different thermal signature. This method would be an excellent tool for detecting the fracture/cracks. It is because of the reason that the naturally occurring water (rain, snowmelt, etc.) ... -
Detection, Identification and Size distribution of micro-plastic particles
(Conference object; Konferansebidrag, 2017)Pollution by micro-plastic in ecosystems is one of the major problems we are facing now, especially in marine environment. Many studies are going on the detection of different micro substances that pollute our environment. Micro-plastics are among the more frequent pollutants of the sort in aquatic ecosystems. There have been some studies earlier on methodologies to detect and identify micro-plastic ... -
Modelling and Simulation of the HDPE Pyrolysis Process
(Conference object; Konferansebidrag, 2017)Pyrolysis is a thermochemical decomposition of organic compounds such as High-density polyethylene (HDPE) plastics. The product of the HDPE pyrolysis is usually diesel with other wastes (such as carbon black, etc.). A pyrolysis reaction is essentially a decomposition reaction performed at elevated temperatures in the absence of oxygen. This work aims to describe some of the primary driving reactions ... -
Solution of Pure Scattering Radiation Transport Equation (RTE) Using Finite Difference Method (FDM)
(Peer reviewed; Book; Bok; Bokkapittel; Chapter, 2017-05-19)Radiative transfer is the physical phenomenon of energy transfer in the form of electromagnetic radiation. The propagation of radiation through a medium is affected by absorption, emission, and scattering. Radiative Transfer Equation (RTE) have been applied in a many subjects including optics, astrophysics, atmospheric science, remote sensing, etc. Analytic solutions for RTE exist for simple cases, ...
