Fakultet for ingeniørvitenskap og teknologi: Nye registreringer
Viser treff 1061-1080 av 1101
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A stochastic programming approach with improved multi-criteria scenario-based solution method for sustainable reverse logistics design of Waste electrical and electronic equipment (WEEE)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-12-17)Today, the increased public concern for sustainable development and more stringent environmental regulations have become the most important driving forces for value recovery from end-of-life and end-of use products through reverse logistics. Waste electrical and electronic equipment (WEEE) contains both valuable components that need to be recycled and hazardous substances that have to be properly ... -
Numerical study of atmospheric ice accretion on rotating geometric cross sections with fins
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-12)This paper describes the numerical study of atmospheric ice accretion on rotating geometric cross sections, circular, hexagon and square , all having fins, to select an optimum geometric cross section for use as a rotating part of a newly- proposed designed icing sensor. Computational fluid dynamics-based numerical analyses were carried out in this research work to understand and analyse the ... -
Thermal Properties of SK One Component Polyurethane using Experiments and Multiphysics Simulations
(Conference object; Konferansebidrag, 2016-12-08)This study proposes to determine the thermal conductivity of SK One Component Polyurethane (SKOCP) developed by China Institute of Water Resources & Hydropower Research Beijing IWHR-KHL Co. Ltd. SKOCP provides excellent proof of aging and chemical resistance of this material. It is non-toxic, acts as a good anti-seepage, offers anti-abrasion and good anti-freezing performance. In addition, it has ... -
Study of Acoustics Properties of SK One Component Polyurethane and its Application in Arctic Marine Structures
(Conference object; Konferansebidrag, 2016-12-08)Marine noise reduction tends to be challenging and requires a comprehensive engineering approach. The soundproofing materials for marine noise reduction are usually exposed to high temperatures, potential fluid or oil spills, engine maintenance and a high airflow environment. This work looks into the acoustic proofing properties of a non-toxic material ‘SK One Component Polyurethane’ developed by ... -
Study of Ice Adhesion Behavior of SK One Component Polyurethane
(Conference object; Konferansebidrag, 2016-12)Ice adhesion causes many serious problems such as aircraft accidents, navigational issues on ships, and power loss on wind turbines. These challenges are mainly associated with the acute behavior of ice adhesion. The ice adheres when water seeps into the microscopic pores of the material substrate and freezes, thereby, forming an interlocking mechanism. Therefore, surface roughness has a significant ... -
Fuktskader i kompakte tak
(Master thesis; Mastergradsoppgave, 2016-11-17)Fuktproblemer er et av de mest kompliserte områdene innenfor bygningsfysikken i dag. I denne rapporten er det gjort vurderinger av materialvalg og løsninger når man bygger med kompakte tak. Det er også presentert typiske fuktskader i kompakte tak og utbedrende tiltak for disse. I denne oppgaven er det brukt metoder som litteraturstudie, intervjuer og casestudie. Moisture problems are one of the ... -
Optimal placement of PMUs considering logical topology of communication medium power system observability
(Master thesis; Mastergradsoppgave, 2016-11-07)A phasor measurement unit (PMU) has a unique ability of providing synchronized phasor measurements of voltage and currents. This ability distinguishes it from all other metering devices. It has been perceived that PMUs hold the capability of revolutionizing the way of power system monitoring and control. However, high per unit cost and challenges related to its communication system has made ... -
Communication in microgrids and virtual power plants
(Master thesis; Mastergradsoppgave, 2016-11-07)One of the cornerstones of the steady operation of microgrids and virtual power plants as building blocks for smart grid is the communication system, which is the main objective for evaluation and research in this thesis. The given project investigates the most widespread communication protocols along with IEC 61850 standard for substations automation applied in smart grids. Based on the presented ... -
Design av dekksmontert knekk-kran
(Master thesis; Mastergradsoppgave, 2016-11-01)Oppgavens hensikt var å designe en kran som skulle være klar til produksjon når prosjektet ferdigstilles. Under prosjekteringen skulle alle aspekter av krandesignet undersøkes. Kranen skulle arktifiseres, dette vil si gjøres klar for en arktiskmaritim vinter. Alle komponenter ble designet med en minimum sikkerhetsfaktor på 1.33, dog har de aller fleste komponentene en høyere sikkerhetsfaktor. Den ... -
Effect of placement of PMUs on state estimation in a power system
(Master thesis; Mastergradsoppgave, 2016-11-07)State estimation is one of the most important processes in modelling and monitoring of a power system. Iterative and less accurate conventional means of estimation are now being replaced by fast and direct state vector measurements provided by PMUs. However, the high cost of PMUs forces engineers to choose wisely where the measurement units should be placed. The given project observes different ... -
Å studere effekt av isolasjonsmaterialet[s] posisjon i en husvegg
(Master thesis; Mastergradsoppgave, 2016-11-01)Rapporten tar for seg en eksperimentelle analyse i for bindelse med varmetransports gjennomyttervegger. Det teoretiske grunnlaget tar for seg Energitap gjennomvegger, varmeoverføringsfaktorer og fordeling i yttervegger. Numeriske beregninger og Simuleringer er utført for å studere virkninger av isolasjonsmaterialer i varmt og kaldforhold. -
Solar panel tracking control. Tracking the variations caused due to reflection from snow and other factors
(Master thesis; Mastergradsoppgave, 2016-11-07)This report presents the design and simulations of a dual-axis solar tracker. This solar tracker works solely based on the output power of the PV panel mounted to it. It does not use any photosensors to orient the PV module. Describing the process in short, the position of the Sun is first calculated based on time and location information. Since this solar panel will be mounted here at UiT, ... -
Quality parameters in evaluation of renovation projects
(Master thesis; Mastergradsoppgave, 2016-11-07)In renovation processes there is always a risk of underestimating environmental, cultural, and social values in favor of energy efficiency and economy. As well as while upgrading the building’s exterior and interior it is very essential to study the physical sustainability of building element in the field climate condition. Therefore it is very important to follow scientific and systematic process ... -
Duct fanned shielding design for quadrotors
(Master thesis; Mastergradsoppgave, 2016-11-01)The master thesis work involved the design implementation of a duct fanned shielding for Quadrotors. This included the investigation of various settings for duct shielding and to identify the best possible option to safe guard propellers of the quadrotor. In addition, the work focused on improving the aerodynamic efficiency, reducing the mass of flight and the use of quadrotors in the arctic ... -
Selvuttørkingsevne og kondensfare for yttervegger i passivhus
(Master thesis; Mastergradsoppgave, 2016-11-03)Etterspørselen av bygg som er oppført etter passivhusstandard øker i Norge, men det er til nå ikke blitt forsket mye på hvordan disse veggene, bygd etter passivhusstandard, vil oppføre seg i norsk klima. Det er blitt undersøkt ytterveggens evne til selvutørking og eventuell kondensfare som kan oppstå, som følge av lokalisering i ulike klimasoner og i forhold til himmelretning. Resultatene fra ... -
Lokalklimaanalyse for bygg og utemiljø
(Master thesis; Mastergradsoppgave, 2016-11-07)Rapporten tar for seg en lokalklimatisk analyse i forbindelse med utbygging av felt B10 og B11 på Skytterhusfjellet, Kirkenes. Det teoretiske grunnlaget tar for seg klimatiske faktorer, komfort og strømningslære. Numeriske simuleringer er utført for å studere virkninger av snø- og vindforhold. Based on theoretical aspects on the influence from climatic factors, comfort and fluid mechanics, this ... -
Energisparetiltak fra et kost- & nytteperspektiv, vurdert mot energimerkeforskriften
(Master thesis; Mastergradsoppgave, 2016-11-01)Hensikten med masteroppgaven har vært å identifisere ulike bygge- og installasjonstekniske tiltak som kan utføres for å redusere energiforbruket, og som samtidig forbedrer energimerket på eksisterende yrkesbygninger i Norge. Målet med oppgaven var videre å se på ringvirkningene av redusert energiforbruk. Det vil si et redusert bruk av fossile brensler, en redusering av bygningenes klimagassfotavtrykk, ... -
Quadrotor modeling and control
(Master thesis; Mastergradsoppgave, 2016-11-03)In this thesis a mathematical quadrotor model based on cascade modeling theory, using a passivity-based control solution is derived and presented. The rotation and translation cascades are rst decoupled, modeled mathematically and simulated separately to test individual control solutions and stability, followed by total system modeling and simulations to verify the control solutions and stability ... -
Ku-band patch antenna design
(Master thesis; Mastergradsoppgave, 2016-11-03)The market for on-the-move satellite communication is increasing, and phased array antennas have characteristics that makes them suited for this. In this thesis design and tuning of a wide-band microstrip patch antenna element for a Ku-band antenna array is presented. The SSFIP structure with a resonating aperture is used for the antenna element, and double resonance allows for operation at both ... -
Immunterapi må tilbys til alle
(Chronicle; Kronikk, 2016-09-20)