• Design basis for Arctic infrastructure facilities 

      Myrmel, Liv Brita Hætta; Gudmestad, Ove Tobias (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-18)
      A discussion related to the selection of a proper design basis for Arctic infrastructure facilities is presented. The design basis, which must be sufficiently robust to ensure safe operations of the facilities during their planned lifetime, should include relevant information available from the local and indigenous people of the area. The need to properly document all data and assumptions made ...
    • 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. ...
    • DEVELOPMENT OF METHOD AND CRITERIA FOR EVALUATION OF DRY-WASHING EFFICIENCY WITH RE-CON ZERO EVO 

      Novakova, Iveta; Norman, Sven-Henrik; Bista, Dipen (Chapter; Bokkapittel, 2022)
      Society recognises the need for the preservation of nature and the need for better resource utilisation. Integration of good practice in the building industry is mainly targeted at reducing or completely eliminating waste. One of the waste sources in the concrete industry is created in washing facilities and consists of returned concrete, washing water and cement slurry. Concrete trucks are washed ...
    • Durability of low carbon concrete verified by various curing conditions for freeze-thaw testing 

      Husby, Martin-André Stormdalshei (Master thesis; Mastergradsoppgave, 2023-05-15)
      This study investigated the feasibility of producing low carbon concrete (LCC) using supplementary cementitious materials (SCMs) and evaluated their impact on concrete F-T durability. Variations in the curing conditions were done to see the effect it had on the F-T resistance. These results were then supported by compressive- and chloride migration testing. The performance of different concrete ...
    • Effect of Microwave Radiation on the Compressive Strength of Solid Ceramic Brick 

      David, Průša; Karel, Šuhajda; Tomáš, Žajdlík; Kateřina, Svobodová; Stanislav, Šťastník; Klara, Hobzova; Venkrbec, Vaclav (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-04-13)
      Microwave radiation is widely utilized in construction practice, especially for drying building materials, remediating damp masonry, or sterilization of biotic pests that have infested building structures. The available scientific and technical literature reports that certain materials exposed to microwave radiation do not change their physical and mechanical properties, although this has not yet ...
    • Effect of pH, COD, and HRT on the Performance of Microbial Fuel Cell Using Synthetic Dairy Wastewater 

      Banerjee, Aritro; Calay, Rajnish K; Das, Subhashis (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-30)
      Microbial fuel cells (MFC) are emerging technologies that can produce electricity while treating wastewater. A series of tests were carried out to evaluate the efficiency of this technology for treating dairy wastewater (DWW). The experiments used Shewanella baltica as an exoelectrogen in a small single MFC to treat simulated DWW. The impacts of various operational factors, specifically pH, ...
    • Effekt av å bruke retarderende stoff (R-stoff) i herdingsprosessen i store betongkonstruksjoner i kaldt klima 

      Hansen, Roy Kristian Tingvoll (Master thesis; Mastergradsoppgave, 2017-06-08)
      Varmeutviklingen i betong avgjøres mye av sement sammensetningen. Sementen er sammensatt av forskjellige klinker som har mye å si for varmeutviklingen, ettersom de har forskjellige energiutvikling og reaksjonshastighet når de kommer i kontakt med vann. Pozzolan er et stoff som kan brukes til å erstatte en vis mengde av sementen, som flygeaske som gir en reduksjon i varmeutviklingen og har mindre ...
    • Effekt av basaltfiber for betongkvalitet = Effect of basalt fiber for quality of concrete 

      Ha, Duy Quang (Master thesis; Mastergradsoppgave, 2019-06-27)
      The need of concrete is getting more and more, experts have researched new materials to improve the good properties of concrete. Basalt fiber is a new additive in the concrete industry, so researches on basalt fiber concrete is not many. Previous research results have shown positive effects of basalt fiber on the mechanical strengths of the concrete. This task is performed by experiments to confirm ...
    • Effekt av Idrocrete KR 1000 på betongporestruktur og permeabilitet (Effect of Idrocrete WP 1000 on concrete pore structure and permeability) 

      Onyango Orony, Elvis (Master thesis; Mastergradsoppgave, 2019-06-27)
      This thesis includes a literature study where the focus is concrete theory and how additives affect the durability of the concrete. In addition, there will be a practical part where the largest part of the task will undergo mainly on the concrete laboratory. Two different mixtures will be mixed. A reference mixture (Ref.B35) and another mixtue with the same recipe, but this will contain an additive ...
    • 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 ...
    • Energianalyse av vannbåren varmesystem - Omlegging fra 5 til 3 rørssystem 

      Kulvik, Stein Georg (Master thesis; Mastergradsoppgave, 2019-06-26)
      I samarbeid med oppdragsgiver K.Lund, ble det under dette prosjektet utført en analyse av det indirekte 3 rørssystemet ved Kanalen i Trondheim. Målet med oppgaven var å se på om det er store differanser på investeringskostnader og varmetap i de forskjellige systemene for vannbåren varme. Med holdepunkter i referanseanlegget ble det gjort analyse og simuleringer av de andre systemene. Resultatene ...
    • Energieffektive glasskonstruksjoner 

      Sokolova, Marina (Master thesis; Mastergradsoppgave, 2017-06-08)
      Rapporten tar for seg vurdering av hvor stort varmetapet gjennom vinduene kan bli ved ulike vindustyper, og hvordan forskjellige vindusløsninger påvirker boligens energibehov. Det teoretiske grunnlaget tar for seg former for varmetransport, energioverføring gjennom glasset og glassruter, samt måter å forbedre varmeisolasjonsevnen på.
    • 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, ...
    • Energiøkonomiserende tiltak for kommunal bygg (Energy saving measures for municipal buildings) 

      Swensen, Åge (Master thesis; Mastergradsoppgave, 2021-06-24)
      Sammendrag I forbindelse med Lurøy kommunes sterke fokus på enøk ønsker de å se hvilken nytte ulike tiltak kan ha på eksisterende bygg. Størsteparten av bygningsmassen til Lurøy kommune er fra 1960- til 1980-tallet. Flere av FNs bærekraftsmål er aktuell for oppgaven. Strøm, fremtidig utsikt for energipris, miljø, resirkulering, gjenbruk og oppgradering av eksisterende boliger og begrense sløsing ...
    • Energy efficient building for Nepalese market 

      Shrestha, Sudhir Man (Master thesis; Mastergradsoppgave, 2017-06-07)
      This thesis aims to give an idea on how we can build an energy efficient buildings on different climatic zones with a use of passive house design strategy saving significant amount of energy. SIMIEN software was used to analyze the energy use of common and modified house along with the thermal comfort of the residential building in Kathmandu. During simulation changes in features like addition of ...
    • Enhanced performance of microbial fuel cells using electrochemically treated carbon felt anode 

      Poureshghi, Fatemeh; Calay, Rajnish K; Das, Subhashis (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-10)
      The microbial fuel cell (MFC) technology is emerging as an effective technology for wastewater treatment to remove and detect many pollutants and simultaneously generate power. The anode is an essential component for bacterial attachment and extracellular electron transfer (EET). Thus, anode performance is critical for improving an MFC system's overall performance. Materials that are electronically ...
    • Evaluating of melting-ice process in a vertical pipe with consideration of net sensible heat 

      Nguyen, Hung Thanh; Gjerløw, Eirik; Huynh, Minh-Thu T. (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-04-19)
      In ice-melting process, motion of liquid–solid interface is complicated due to moving boundary, which is also called Stefan interface problem. Although the Stefan model has been widely utilized, it frequently overestimates the melting rate. In the present study, the net-sensible-heat of the phases are taken into account as an additional physical effect to the Stefan model for one-phase case and ...
    • Evaluation of optimal replacement of natural aggregates by recycled concrete aggregates to achieve sufficient durability 

      Novakova, Iveta; Sjåfjell, Jørgen J.; Venkrbec, Vaclav (Preprint; Manuskript, 2022)
      The use of recycled concrete aggregate (RCA) is one way to reduce the depletion of raw materials for the production of concrete. In this article RCA was tested and evaluated. Concrete with 25 to 80 % of RCA was examined in terms of its durability performance, particularly capillary absorption and shrinkage. Capillary absorption testing showed that RCA has better or identical results as the reference ...
    • Evaluering Interface betingelsen, randkraver og samt frysning/melting front ved fasesendring material i hus-kompositt-veggen, basert på eksperiment temperatur data 

      Ji, Yiran (Master thesis; Mastergradsoppgave, 2023-05-14)
      Effektiv bruk energi i et hus/bygg er en drivende utvikling i byggenæring i de siste år. Det er en komplisert-omfang-og sammensatt problem for byggteknologi. For nevnt noe problemstiller, hvordan/hvilken energi kilde som elektrisk, fjernvarme, sol-, vind- som dekker huse behov og samt ha en gunstig effekt på natur, kostnad, og samfunnsforhold. Og, hvordan får vi optimal/gunstig fordeling energi i ...
    • Experimental Investigation of Deicing with Seawater 

      Sæterdal, Ane Solbakken; Visich, Aleksandra; Deshpande, Sujay; Sundsbø, Per-Arne (Chapter; Bokkapittel, 2023-06-19)
      Increased traffic and interest in arctic regions necessitate measures to ensure the safety and functionality of vessels. Sea-spray icing is one of the significant hazards for small- and medium-sized vessels in polar waters. Ice cover can restrict access to essential parts of a vessel and compromise its stability. Existing deicing measures, such as heat or chemical application and manual ice removal, ...