Blar i utgivelsesdato Institutt for bygg, energi og materialteknologi

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    • Science and Mathematics as part of practical projects in technology and design: An analysis of challenges in realising the curriculum in Norwegian schools 

      Bungum, Berit; Esjeholm, Bjørn-Tore; Lysne, Dag Atle (Journal article; Peer reviewed; Tidsskriftartikkel, 2014)
      Technology and design is seen by many as having a potential for students to work with science and mathematics in practical contexts. The view is particularly evident in the Norwegian curriculum, where technology and design is defined as an interdisciplinary topic involving Science, Mathematics and Art & Crafts. This paper reports from a video study of the use of mathematics and science in student ...

    • Design of water shock tube for testing shell materials 

      Ji, Hongjuan; Mustafa, Mohamad; Khawaja, Hassan Abbas; Ewan, Bruce C.; Moatamedi, Mojtaba (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-04-15)
      This paper presents design considerations for a shock tube experimental rig used to investigate the dynamic failure mechanisms of shell geometries subjected to water shock impact loading. In such setup, it is desirable that the drive pressure used within the tube can provide a wide range of impulsive loads on the test structures and some flexibility can be achieved on the applied pulse durations. ...

    • Investigation of the Structure of Airflow Behind a Porous Fence Aided by CFD Based Virtual Sensor Data 

      Mustafa, Mohamad; Xu, Yizhong (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-02-28)
      Physical experiments have difficulties to thoroughly investigate the full structure of air flow behind a porous fence. Physical measurement sensors have their limitations of data acquisitions in turbulent air flow. Computational Fluid Dynamics (CFD) technique provides an infinite number of virtual sensors that allows producing quantitative CFD based virtual sensors data for users. In this paper, ...

    • 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 ...

    • Residential Construction Sustainability in the UK and Prospects of Knowledge Transfer to Kazakhstan 

      Calay, Rajnish K; Tokbolat, Serik (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-10-22)
      This paper aimed to investigate the up-to-date levels of sustainability in the UK construction with special interest to sustainable housing. It also aims to examine the justification behind construction and housing sustainability, and to look at the practicality of transferring current expertise within the UK as well as to an emerging Central Asian country such as Kazakhstan. A synergy of case ...

    • 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 ...

    • Biogas from Organic Waste - A Case Study 

      Mustafa, Mohamad; Calay, Rajnish K; Roman, Elisabeth (Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-07-01)
      This paper presents a case study to investigate the potential for upgrade of a bio-waste treatment plant. The paper also discusses development potentials in order to optimize the plant for maximum energy and environmental benefits. Data gathered over two consecutive years about the production of biogas, energy and bio-rest were considered and mass balance analysis of inputs and outputs of the ...

    • Thaw Penetration in Frozen Ground Subjected to Hydronic Heating 

      Sveen, Svein Erik; Nguyen, Hung Thanh; Sørensen, Bjørn Reidar (Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-09-22)
      To facilitate excavation and foundation work in seasonally freezing or permafrost regions, the frozen soil must be thawed, either by natural (solar) thawing, or by artificial thawing where an auxiliary heat source is utilized to accelerate the process. In this paper, the process of rapid thawing of frozen ground subject to hydronic heating is studied. In particular, the performance characteristics ...

    • Energisparetiltak fra et kost- & nytteperspektiv, vurdert mot energimerkeforskriften 

      Hessedal, Johan (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, ...

    • Å studere effekt av isolasjonsmaterialet[s] posisjon i en husvegg 

      Anwar, Mohammad (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.

    • Selvuttørkingsevne og kondensfare for yttervegger i passivhus 

      Johansen, Øyvind Vollnes (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 

      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 ...

    • Quality parameters in evaluation of renovation projects 

      Regmi, Santosh (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 ...

    • Brannsikring av ventilasjonskanaler. Fire safety in ventilationducts 

      Aastorp-Tangen, Sigve; Gjendem, Jan Rachid (Master thesis; Mastergradsoppgave, 2016-11-17)
      Brannsikring av ventilasjonssystemer har fått svært mye fokus de siste årene, på grunn av uklare retningslinjer for prosjekterende. TEK10 setter kun funksjonskrav for hvordan tekniske installasjoner skal brannsikres, og det er dermed opp til de prosjekterende å sette opp løsninger innenfor lovverket. På bakgrunn av det uklare regelverket ble det nedsatt en gruppe med rådgivere for å utarbeide en ...

    • Fuktskader i kompakte tak 

      Fjelde, Martin Jonassen (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 ...

    • Efficient Distributed Localization Algorithm for Ownership Identification of Reindeer Calf Using Wireless Sensor Networks 

      Mustafa, Mohamad; Morral Adell, Gemma; diengy, Ndeye Amy (Journal article; Tidsskriftartikkel, 2017)
      This paper presents a distributed algorithm for identifying the ownership of new-born reindeer calves using wireless sensor networks (WSNs). Reindeer are semi wild animals giving birth while in the wild. Although reindeer cows usually carry identification tags or signs of their owners, it is difficult to identify the ownership of the calves within a mixed herd. Currently, identification is performed ...

    • A Hybrid Biomass Hydrothermal Gasification- Solid Oxide Fuel Cell System Combined with Improved CHP Plant for Sustainable Power Generation 

      Mustafa, Mahmoud; Nord, Natasa; Calay, Rajnish K; Mustafa, Mohamad (Journal article; Peer reviewed; Tidsskriftartikkel, 2017)
      The most popular technique, so far, for biomass waste to energy conversion has been incineration, but this technique has raised a lot of objection among nature activists due to the release of particulate matter and pollutants like nitrogen oxides (NOx) into the atmosphere. However, advanced non-incineration conversion methods like pyrolysis, thermal gasification, and plasma-arc gasification are ...

    • 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 ...

    • Investigating Effects of pH on Microbial Growth in Continuous Stirred Tank Bioreactors 

      Das, Subhashis; Calay, Rajnish K; Chowdhury, Ranjana (Conference object; Konferansebidrag, 2017)

    • A Techno-economic Study of a Biomass Gasification Plant for the Production of Transport Biofuel for Small Communities 

      Mustafa, Albara Mohamad Yazid Faisal; Calay, Rajnish K; Mustafa, Mohamad (Journal article; Peer reviewed; Tidsskriftartikkel, 2017-03-30)
      A techno-economic feasibility study of liquid bio-fuel production from biomass to meet the demand for public transport in small communities is presented. The methodology adopted in this work is based on calculating the demand of fuels required by transport sector and then estimating the amount of available biomass from various sources which can be treated to produce biofuels to meet the demand ...