Now showing items 481-500 of 541

    • Dynamic spare parts transportation model for Arctic production facility 

      Ayele, Yonas Zewdu; Barabadi, Abbas; Barabady, Javad (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-09-14)
      Timely delivery of the required spare parts plays an important role in meeting the availability target and reducing the downtime of production facilities. Spare parts logistics is affected in complex ways while operating in the Arctic, since the area is sparsely populated and has insufficient infrastructure. It is also greatly affected by the distinctive operational environment of the region, ...
    • Shipping oil from the Russian Arctic: Past experiences and future prospects 

      Bambulyak, Alexei; Sydnes, Are K.; Milakovic, Aleksandar-Sasa; Frantzen, Bjørn (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06)
      Transport of oil from Russian Arctic ports to Western markets was insignificant prior to 2002. In 2002, there was a major surge, with 5 million tonnes delivered westwards through the Barents Sea. By 2004, this had increased to 12 million tonnes. Since then, annual volumes have been on levels between 9 and 15 million tonnes. In the near future, the flow of oil cargo in the Arctic may rise ...
    • Application of a 2-D approximation technique for solving stress analyses problem in FEM 

      Khawaja, Hassan Abbas (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-24)
    • Review of the phenomenon of fluidization and its numerical modelling techniques 

      Khawaja, Hassan Abbas (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-24)
    • Marine icing observed on KV Nordkapp during a cold air outbreak with a developing polar low in the Barents sea. 

      Samuelsen, Eirik Mikal; Løset, Sveinung; Edvardsen, Kåre (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06)
      Marine icing is a phenomenon that may occur for temperatures below subfreezing where sea spray either is lofted from the sea surface or being generated by waves interacting with a ship or a structure. On a voyage from Tromsø to the waters east of Bjørnøya late February 1987, the Norwegian Coast Guard vessel KV Nordkapp experienced heavy icing due to a polar low that raged over these waters during ...
    • Group Based Asymmetry – A Fast Saliency Algorithm 

      Sharma, Puneet; Eiksund, Oddmar (Chapter; Bokkapittel, 2015-12-18)
      In this paper, we propose a saliency model that 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. This results is an algorithm which reduces the number of calculations by at-least half that makes it the fastest among the ...
    • Risiko og sikkerhetskrav hos norske alenefiskere 

      Fagerborg, Hilde Hansen (Master thesis; Mastergradsoppgave, 2014-12-15)
      Fisker blir omtalt som Norges farligste yrke (Benjaminsen, 2013). En alenefisker er person som jobber alene om bord et mindre fartøy. Det er mye som kan gå galt om bord en sjark, og man kan være langt fra land når ulykken inntreffer og det kan være vanskelig å få hjelp. Problemstillingen for denne oppgaven er: «Hvordan vurderer alenefiskeren egen risiko, og hvordan forholder de seg til lovpålagte ...
    • Drilling waste minimization in the Barents Sea 

      Zaki, Rezgar (Master thesis; Mastergradsoppgave, 2015-05-19)
      With the increasing demand for energy over recent decades, the Arctic region has become an interesting area for future oil and gas exploration and development. The Barents Sea has the most western position among the Arctic seas surrounding the coast of Western Russia and Northern Norway. In the recent years several oil and gas discoveries done in this area and the number of wells is steadily ...
    • Study of Refrigerants for Heat Pumps in Colder Climate 

      Eriksen, Nils Eivind (Master thesis; Mastergradsoppgave, 2014-06-01)
      The aim for the thesis is to look at the performance of natural refrigerants in heat pumps while operating in a colder climate. The advantage of using natural refrigerants is that they have significantly lower global warming potential (GWP) in comparison to the synthetic refrigerants i.e. hydro fluorocarbons (HFC) and hydro chlorofluorocarbons (HCFC). Natural refrigerants are becoming common to use ...
    • Optimization of maritime operations in Arctic. Rating of improvement of weather routing/decision support systems for maritime operations in the Arctic region 

      Johansen, Kåre (Master thesis; Mastergradsoppgave, 2013-05-15)
      Abstract The decreased ice extent caused by increased air and sea temperatures has led to a growing interest in the Arctic waters. There are different maritime industries that have plans to expand northwards for various reasons. First of all there are different developments in oil and gas industry in Barents, Kara, Greenland, Arctic sea around the coast of Canada and Alaska. New ship trading ...
    • Seismic Surveys in Ice-Covered Waters 

      Klavenes, Jørgen Sørensen (Master thesis; Mastergradsoppgave, 2013-06-03)
      The master’s thesis ‘Seismic surveys in ice-covered waters’ describes several methods within the maritime seismic industry to acquire data concerning the Earth’s strata. It is the objective of this thesis to present a viable solution enabling the seismic industry to perform surveys in ice influenced waters. The hardware conducted for conventional seismic surveys are introduced and explained. ...
    • Modelling of Marine Icing with Close Range Photogrammetry 

      Haukebø, Asbjørn Risholm (Master thesis; Mastergradsoppgave, 2015-05-01)
      Installations and vessels operating in the high North in the winter season are likely to be subjected to marine Icing. To date there are no sensor technology available to accurately measure the total weight or volume of the ice. Photogrammetry is a universal 3-D measuring technique applied in a wide range of interdisciplinary fields. Agisoft PhotoScan is a photogrammetry software utilizing Structure ...
    • Risk-Based Spare Part Planning. Uncertainties and Operational Conditions 

      Ayele, Yonas Zewdu (Master thesis; Mastergradsoppgave, 2013-03-20)
      Estimates which indicate a large share of the world’s undiscovered oil and gas resources is to be found in the Arctic areas and the increasing demand for energy are important reasons for the growing interest in the High North region. As the offshore industry expands into the High North, system failures associated with these projects is expected to increase significantly. Hence, the quest for ...
    • CO2 Absorption and Desorption Simulation with Aspen HYSYS 

      Birkelund, Even Solnes (Master thesis; Mastergradsoppgave, 2013-06-01)
      The last years it has been an increasing global interest to reduce emissions of greenhouse gases to the atmosphere. One of the most important greenhouse gases is CO2. To reduce CO2 emissions carbon capture and storage (CCS) is the most realistic approach. With today’s technology absorption by an amine solution is the most developed and applicable method for post-combustion CO2 capture. But this ...
    • Criticality Analysis of Platform Supply Vessel (PSV) 

      Azad, Marziyeh Bagheri (Master thesis; Mastergradsoppgave, 2014-06-01)
      The oil and gas industry has expanded consistently from land operations to inland waterways and then to offshore. A platform supply vessel (PSV) is an important element of offshore supply logistics. Hence, its acceptable level of availability performance is highly demanded. Identification of critical components provides essential information for improving and optimizing the maintenance management, ...
    • Environmental risk influencing factors for petroleum drilling in the western Barents Sea 

      Sætrum, Tina (Master thesis; Mastergradsoppgave, 2013-05-31)
      Offshore petroleum drilling in harsh and cold environment, like in the Barents Sea, can be challenging and risky due to the prevailing weather condition. How the physical environment affects systems, components, and working environment has to be enlightened in order to operate safely. The vulnerable environment, remoteness, and possible outcomes if an accident occurs are of great concern. The society, ...
    • Application of reliability and maintainability analysis in the Svea coal mine 

      Furuly, Simon Andre (Master thesis; Mastergradsoppgave, 2012-05)
      The field of reliability engineering is developing, as needed in the industry. This is especially in arctic regions which now are being explored and vast recourses and opportunities are found. The reliability research is limited in the arctic, little knowledge is known about operating in the arctic regions. This research study will analyze equipment in an arctic region, Svalbard. It calculates the ...
    • Barrier management - Influence from the human factor in the arctic 

      Madsen, Ole Kristian (Master thesis; Mastergradsoppgave, 2013-05-31)
      In recent years several serious near-misses with major hazard accident potential have happened on the Norwegian Continental Shelf, many of them hydrocarbon leaks. Research has shown that many of these are caused by manual intervention. Despite this fact, current focus in QRAs and have been for a long time, are on technical systems. This is despite recent trends showing no decline in risk level. A ...
    • Risk of Ship Collision in the Barents Sea in 2030 

      Balto, Jan Børre Hansen (Master thesis; Mastergradsoppgave, 2014-06-01)
      This thesis evaluates the risk of ship collisions in the Barents Sea in 2030 between three future scenarios; Minimum, Basis and Maximum Scenario. IWRAP Mk2 program is utilized to make the calculations. Automatic Identification System (AIS) data of 2013 is used to parameterize current traffic density, while the increased traffic in the different scenarios is derived from an analysis of multiple ...
    • Well Testing in the Barents Sea. Risk Analysis; Methods and Procedures 

      Mathisen, Espen Heiskel (Master thesis; Mastergradsoppgave, 2014-06-01)
      The thesis is done in co-operation with DNV GL Harstad and Schlumberger. DNV GL has provided access to historical accidents data, by using technical documents. Schlumberger has provided technical information about well testing and hazards related to such an event, and an internal risk analysis document, which they use in their operations. This document is modified to suit, and account, for arctic ...