Now showing items 72-91 of 129

    • Langsiktig effekt av energifokus for hotellbygg 

      Kjær, Jonas (Master thesis; Mastergradsoppgave, 2021-05-15)
      Oppgaven skal undersøke langsiktig effekt av energifokus for Quality Hotel Harstad, som er prosjektert etter Byggteknisk forskrift (TEK17). Energiberegningsverktøyet SIMIEN er anvendt for å analysere energibehovet til hotellet, og kartlegge hvilke energibesparendetiltak som gir høyest effekt. Hovedmålet er å vurdere hvilke tiltak som bør iverksettes for å heve hotellets energiklasse fra B til A i ...
    • Lavenergi brannstasjon i Narvik 

      Kvitvik, Kenth I. Ljunggren (Master thesis; Mastergradsoppgave, 2017-06-07)
      Energibruken i Norge har steget med 40 % siden 1970-årene, og bygningssektoren legger beslag på om lag 38 % av den totale energibruken i Norge. På bakgrunn av denne utviklingen ble kapittelet for energikrav revidert i teknisk forskrift fra 1. Januar 2016. De nye energikravene hadde ett års overgangstid hvor de gamle energikravene (TEK 10) kunne benyttes, og de nye energikravene (TEK 16) gjelder i ...
    • LCC-analyse for varmepumpeanlegg 

      Hjertnes, Jostein Karlsen (Master thesis; Mastergradsoppgave, 2021-05-18)
      EU har som mål å redusere klimagassutslippene med minimum 40 prosent innen 2030 sammenlignet med 1990. Dette har medført til en rekke endringer i byggebransjen, som blant annet utvikling av bygg med vesentlig lavere energibehov enn tidligere. Samtidig har det termiske energiforsyningssystemet fått mer fokus. Deriblant identifiseres varmepumper som nøkkelteknologi for å nå kravene til EUs ...
    • Lokalkimaanalyse for utbyggingsprosjekt 

      Zykova, Anastasia (Master thesis; Mastergradsoppgave, 2017-06-08)
      I forbindelse med den planlagte utviklingen av Harstad sentrum er det gjennomført numeriske simuleringer i Flow 3D med følgende vindanalyse for å vurdere lokale komfortforhold. Bygningsvolumet i sentrum medførte noe økning av vindforhold som er likevel akseptabelt for myke trafikanter. Men for å unngå negative påvirkninger på utearealer for stillesittende opphold ble det foreslått avbøtende tiltak ...
    • Lokalklimaanalyse for bygg og utemiljø 

      Størkersen, Ellen Gjersdal (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 ...
    • Low Carbon Concrete Possibilities: EPD and Regulations in Northern Periphery and Arctic 

      Novakova, Iveta; Perumal, Priyadharshini; Cwirzen, Andrzej; Wallevik, Olafur Haralds (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-14)
      Concrete is one of the most common building materials in the Northern Periphery and Arctic, and therefore we should pay attention to its quality while reducing its carbon footprint. The concrete industry has established many measures to limit greenhouse gas emissions from concrete, as stated in the environmental product declaration (EPD). The most significant contributor is cement (common dose ...
    • Luftfuktighet i bolighus 

      Hansen, Mona (Master thesis; Mastergradsoppgave, 2023-05-14)
      Denne masteroppgaven er en litteraturstudie av luftfuktighet i bolighus, i tillegg til en case studie i bolighus knyttet til luftfuktighet ved planter. Oppgaven dekker litteraturstudie knyttet til forskning og fakta både i Norge og internasjonalt. Ifølge verdens helseorganisasjon (WHO) oppholder en person seg 90 % av tiden innendørs. Luftfuktighet er en av faktorene som er avgjørende for at inneklima ...
    • Measurement of Wind Flow Behavior at the Leeward Side of Porous Fences Using Ultrasonic Anemometer Device 

      Mustafa, Mohamad; Xu, Yizhong; Haritos, George; Kenji, Kosugi (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-01)
      Efficiency of wind fences is evaluated by the reduction of wind velocity and the effective shelter area behind the fence. Fence porosity is the most influential structural parameters in the porous fence design, and has significant impact on the structure of wind velocity and turbulence leeward. In this work, three fences with porosity of 23%, 35% and 45% have been tested under 10m/s inlet velocity ...
    • Modell for kontroll av innlevert FDV-dokumentasjon for bygg. Model for control of management, operation and maintenances documentation for construction works 

      Dibaba, Dejenu Zerga (Master thesis; Mastergradsoppgave, 2018-08-16)
      The report discuss requirement established/set by Planning and Building Act (PBL), Technical Regulations (TEK) and responsibilities that client representant has for the control of FDV handover. The consequences due to loss of FDV -documents for those who manage, operate, maintain and develop a building can be a cost and quality concern after the project is completed and handed over. NS 3456:2010 ...
    • Modelling Multi-layer Hydronic Radiators 

      Chen, Liguo; Sørensen, Bjørn Reidar (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-30)
      This report simulates Purmo type C22 and C33 radiators with both standard calculation and heat transfer method with help of Matlab/Simulink. Simulation results are presented to describe the radiators’ thermal performances with different simulation strategies. The deviations between two different calculation methods are identified and the heat transfer radiator model can be improved with more ...
    • Numerical Simulation of Non-normal Wind Load on Porous Fences 

      Xu, Yizhong; Mustafa, Mohamad; Calay, Rajnish K; Sørensen, Bjørn Reidar (Journal article; Peer reviewed; Tidsskriftartikkel, 2017)
      This paper presents a numerical simulation of non-normal wind loads on a porous fence. It was found that non-normal wind load has significant impact on the performance of the fence in terms. The performance of the fence was measured as the effective fence zone behind the fence where flow characteristics and normal drag coefficients were maintained within safe level. It is recommended the incidental ...
    • Numerical study on the ventilation performance of a livestock house built in porous panels in Cold Regions 

      Mustafa, Mohamad; Xu, Yizhong; Calay, Rajnish K; Sørensen, Bjørn Reidar (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-11)
      This paper presents a numerical prediction on the assessment of natural ventilation on a livestock house built in porous panels, aided by Computational Fluid Dynamics techniques. A typical climatic environment in Cold Regions was taken into consideration. The ventilation performances have been assessed by the distribution of indoor air velocity, turbulence intensity and local mean age of air through ...
    • Numerical study on the ventilation performance of a livestock house built in porous panels in Cold Regions 

      Xu, Yizhong; Mustafa, Mohamad; Calay, Rajnish K; Sørensen, Bjørn Reidar (Journal article; Tidsskriftartikkel; Peer reviewed, 2019)
      This paper presents a numerical prediction on the assessment of natural ventilation on a livestock house built in porous panels, aided by Computational Fluid Dynamics techniques. A typical climatic environment in Cold Regions was taken into consideration. The ventilation performances have been assessed by the distribution of indoor air velocity, turbulence intensity and local mean age of air through ...
    • On crystallographic aspects of heterogeneous plastic flow during ductile tearing: 3D measurements and crystal plasticity simulations for AA7075-T651 

      Morgeneyer, Thilo; Khadyko, Mikhail; Buljac, A; Helfen, Lukas; Hild, Francois; Benallal, Ahmed; Børvik, Tore; Hopperstad, Odd Sture (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-21)
      Crystallographic aspects of heterogeneous plastic flow during ductile tearing are assessed experimentally by combining in situ synchrotron laminography imaging of notched flat samples with a full-field measurement technique and numerical simulations with the crystal plasticity finite element method (CP-FEM). Advantage is taken of the plane strain condition in the region ahead of the notch root (i.e., ...
    • Ownership Identification of Reindeer Calf Using Wireless Sensor Networks (WSN) 

      Mustafa, Mohamad (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-08-10)
      This paper presents a technique for identifying the ownership of new-born reindeer claves using wireless sensor networks (WSNs), which is an important tool that can be used to acquire useful information about animals’ activities and movements. Reindeer are semi wild and they give birth while in the wild. Although reindeer cows usually carry identification tags or signs of their owners, it is ...
    • Parametric Sensitivity of CSTBRs for Lactobacillus casei: Normalized Sensitivity Analysis 

      Das, Subhashis; Calay, Rajnish K; Chowdhury, Ranjana (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-18)
      In this paper, a sensitivity analysis of a continuous stirred tank bioreactor (CSTBR) was conducted to determine a parametrically sensitive regime. The growth of a lactic acid bacterium, namely, <i>Lactobacillus casei</i>, in a pH-controlled CSTBR was considered as a process model. Normalized objective sensitivities of the minimum pH were determined with respect to input parameters. A generalized ...
    • Permanente og mobile løsninger for tining av stikkrenner, grøfter og bekkeløp 

      Fæster, Jon-Inge (Master thesis; Mastergradsoppgave, 2022-05-16)
      Åpne linjegrøfter, stikkrenner og bekkeløp er essensielt for å ha et sikkert og velfungerende veg- og jernbanenett. Det vises at iskjøving er et av hovedproblemene som gjør at vannet fryser til is i nærheten til infrastrukturen og man får driftsforstyrrelser i form at is som enten har falt ned på vegbanen, eller fryser ut i skjæringene og gir reduksjon av profilet som jernbanens materiell krever for ...
    • Poly[2,2′-(4,4′-bipyridine)-5,5′-bibenzimidazole] functionalization of carbon black for improving the oxidation stability and oxygen reduction reaction of fuel cells 

      Berber, Mohamed R.; Mustafa, Mohamad Y. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-20)
      The rapid oxidation of carbon black (CB) is a major drawback for its use as a catalyst support in polymer electrolyte fuel cells. Here, we synthesize poly[2,20 -(4,40 -bipyridine)-5,50 -bibenzimidazole] (BiPyPBI) as a conducting polymer and use it to functionalize the surface of CB and homogenously anchor platinum metal nanoparticles (Pt-NPs) on a CB surface. The as-prepared materials were ...
    • Possibility study for utilization of solar energy in Arctic areas 

      Tamrakar, Stutee (Master thesis; Mastergradsoppgave, 2019-06-26)
      This thesis investigates a solar thermal system and a solar photovoltaic system which produces local energy by incoming solar radiation to meet the energy consumption demand of a residential building in the arctic region. An existing building block in Narvik, within the sub-arctic region, was taken as study case to analyze the potential of solar energy.
    • Potensial for reduksjon av livssyklus klimagassutslipp ved gjenbruk og resirkulering av betong 

      Dinh, Thomas (Master thesis; Mastergradsoppgave, 2021-05-15)
      Verden står ovenfor store klimaendringer og klimagassmengden fortsetter å øke. For å begrense økning av gjennomsnittstemperaturen må tiltak iverksettes for å redusere utslippene. Betong er det mest anvendte byggematerialet i verden og det brukes dobbelt så mye betong enn andre byggematerialer til sammen. Sementproduksjon antas å bidra til 7-8 prosent av klimagassutslipp på verdensbasis. Betong ...