Artikler, rapporter og annet (bygg, energi og materialteknologi): Recent submissions
Now showing items 21-40 of 69
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Artificial Thawing of Frozen Ground: A Review
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-27)Understanding the freezing and thawing processes in porous media such as soils is important, especially in regions experiencing seasonal frost or permafrost. These processes have a wide range of implications as diverse as how to maintain the structural integrity of roads, railways, pipelines, and buildings, to when to plant seeds during the growth season. Thawing of frozen ground is the opposite ... -
Preliminary Study on the Mechanical Activation and High‐Temperature Treatment of Saponite‐Containing Tailings Generated during Kimberlite Ore Dressing
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-13)This study investigates transformations of a pre-mechanically activated saponite-containing material with subsequent high-temperature treatment. The thermogravimetric analysis confirmed that the mechanical activation of saponite leads to the destruction of its layered structure, accompanied by the release of silicon dioxide and magnesium oxide in free form. The values of surface activity for ... -
Comparison of “Zero Emission” Vehicles with Petrol and Hybrid Cars in Terms of Total CO2 Release—A Case Study for Romania, Poland, Norway and Germany
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-27)The authors compare the energy consumption and CO<sub>2</sub> emissions from vehicles using internal combustion engines (ICE), battery electric vehicles (BEV), fuel cell electric vehicles (FCEV), and two types of hybrid vehicles, BEV‐ICE hybrid and BEV‐FCEV hybrid. This paper considers several scenarios for four countries’ electricity production from primary energy sources to estimate total ... -
Review on material and design of anode for microbial fuel cell
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-21)Microbial Fuel Cell (MFC) is a bio-electrochemical system that generates electricity by anaerobic oxidation of substrates. An anode is the most critical component because the primary conversion of wastewater into electrons and protons takes place on the surface of the anode, where a biofilm is formed. This paper describes the essential properties of the anode and classifies its types according ... -
Experimental Study of Power Generation and COD Removal Efficiency by Air Cathode Microbial Fuel Cell Using Shewanella baltica 20
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-05)Microbial fuel cells (MFCs) are a kind of bioreactor for generating electricity, facilitated by exoelectrogens while treating wastewater. The present article focuses on the performance of an air cathode plexiglass MFC in terms of chemical oxygen demand (COD) removal efficiency and power output by performing two sets of experiments. The proton exchange membrane and electrode materials were Nafion ... -
Pre-Holocene volcanic ash in sediments near Jan Mayen
(Conference object; Konferansebidrag, 2022-05) -
Role and Important Properties of a Membrane with Its Recent Advancement in a Microbial Fuel Cell
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-09)Microbial fuel cells (MFC) are an emerging technology for wastewater treatment that utilizes the metabolism of microorganisms to generate electricity from the organic matter present in water directly. The principle of MFC is the same as hydrogen fuel cell and has three main components (i.e., anode, cathode, and proton exchange membrane). The membrane separates the anode and cathode chambers and ... -
Residential Construction Sustainability in the UK and Prospects of Knowledge Transfer to Kazakhstan
(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 ... -
The Volcanic Hazards of Jan Mayen Island (North-Atlantic)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-04)Hazard assessment of remote volcanic islands provides many challenges compared to other volcanoes and volcanic fields. Here we present the first systematic volcanic hazard assessment of Jan Mayen Island, a remote island located in the North-Atlantic Ocean and home to the northernmost active subaerial volcano in the world (Beerenberg Volcano), and we discuss some of the challenges and characteristics ... -
Integration of Renewable Energy Technologies in University Campuses: a Case Study
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-10)Renewable energy technologies are becoming widely integrated into energy generation systems around the world. While the majority of such technologies are integrated at a large scale in the form of wind and solar farms, there is a need for their incorporation into the built environment. A university campus is an ideal place for testing and understanding how renewable energy technologies can be ... -
Utvikling av digitale læringsressurser for forkurs for ingeniørutdanning på tvers av studiesteder
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-25)Fra høsten 2019 har forkursene for ingeniørutdanning ved UiT -Norges arktiske universitet deltatt i prosjektet «Sammen 2021» der målet er å bedre gjennomstrømmingen og øke rekrutteringen til ingeniørstudiene gjennom å forbedre studieopplegget og læ ringsprosessene i alle fagene på forkursene. Forkurs/realfagskurs tilbys i dag ved studiestedene Alta, Tromsø, Narvik og ... -
Investigation of the impacts of design parameters on thermal performance of buildings in cold climate
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-29)While design optimization of buildings seeks to improve energy efficiency and, thus, leads to greenhouse gas emissions reduction, the thermal performance of buildings can be compromised. Thermal performance is an important aspect as it directly affects the health and wellbeing of occupants. This study aims to investigate using a simple simulation tool to examine the correlation between a set of ... -
Simplified Thermal Performance Evaluation of a PCM-Filled Triple-Glazed Window under Arctic Climate Conditions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-02)This paper evaluates the thermal performance of a triple-glazed glass window filled with a phase-change material (PCM) compared to the performance of a traditional triple-glazed window with air gaps. The chosen PCM was paraffin wax. A mathematical model to simulate heat transfer within the system was presented. A commercially available software, COMSOL Multiphysics, was used to numerically solve the ... -
Simplified Thermal Performance Evaluation of a PCM-Filled Triple-Glazed Window under Arctic Climate Conditions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-02)This paper evaluates the thermal performance of a triple-glazed glass window filled with a phase-change material (PCM) compared to the performance of a traditional triple-glazed window with air gaps. The chosen PCM was paraffin wax. A mathematical model to simulate heat transfer within the system was presented. A commercially available software, COMSOL Multiphysics, was used to numerically solve ... -
Soil Moisture Variations in Frozen Ground Subjected to Hydronic Heating
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-10)Full-scale thawing experiments, performed on three types of homogenous, initially frozen soils, were carried out during late winter 2011 and repeated in 2012. An auxiliary heat source (hydronic heating) was employed to initiate and expedite the thawing process. The corresponding phase change, soil temperature increase, and variations in bound and unbound water content were monitored during the ... -
Circular economy: Challenges and opportunities in the construction sector of Kazakhstan
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-24)The circular economy in the construction sector in emerging economies is one of the most promising concepts that aims to keep the value of the construction materials and structures as long as possible. The construction industry is rapidly developing in Kazakhstan with a yearly increase in projects. This research paper investigates the construction sector in Kazakhstan in terms of the potential ... -
Use of digital technology to follow the consequences of a warming Arctic climate
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021)The rapid warming climate is causing the Arctic ice to retreat and the permafrost to melt. These visible manifestations of the ongoing climate change are few of many environmental and societal changes that take place in the Arctic. The acceleration of digitalization and implementation of digital technology bring new opportunities to follow the consequences of the warmer arctic climate, but also ... -
On crystallographic aspects of heterogeneous plastic flow during ductile tearing: 3D measurements and crystal plasticity simulations for AA7075-T651
(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., ... -
A Comprehensive Summary of Available Legislation and Practices in Demolition and Construction & Demolition Waste Management in the Arctic Region
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-17)The need for better natural resource use is currently increasingly recognised, and high emphasis is given to the circularity of building materials and the reduction of activities with negative environmental impact. Legislation, guidelines, and other documentation play an important role in improving demolition activities and construction and demolition waste (CDW) management. Good practices in CDW ... -
Hvordan kommuniserer lærere med elevene i teknologiprosjekter?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-14)Inquiry-based methods have been seen as important for developing science in school. There are good reasons why the work of designing various technological devices in technology should also be part of inquiry-based methods. If so, it requires that the teachers have an exploratory approach in communicat-ing with students. In this paper, we analyze the communication between teachers and students in six ...