Institutt for energi og prosessteknikk
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Enzymatic pretreatment of steam-exploded birch wood for increased biogas production and lignin degradation
(Peer reviewed; Journal article, 2021)Lignocellulose is readily available biomass for biogas production; however, due to its rigid structure, it requires pretreatment to obtain a maximum energy extraction. In this study, steam explosion (SE) (220 °C and 10 ... -
On the role of symmetry and degeneracy in nonlinear thermoacoustic eigenproblems with application to can-annular combustors
(Doctoral theses at NTNU;2022:30, Doctoral thesis, 2022)The subject of this dissertation are thermoacoustic instabilities in combustion chambers with discrete rotational and reflective symmetries. Designing thermoacoustically stable combustors is one of the principal challenges ... -
The Effect of Hydrogen Enrichment on the Thermoacoustic Behaviour of Lean Premixed Flames
(Doctoral theses at NTNU;2022:23, Doctoral thesis, 2022)Gas turbines (GT) burning hydrogen can help deliver large-scale zero carbon power generation and facilitate rapid decarbonisation over the short to medium term. They can also play a crucial role in increasing the penetration ... -
Rapid change of particle velocity due to volatile gas release during biomass devolatilization
(Peer reviewed; Journal article, 2021)Our earlier study showed significant differences in average particle velocity between simulation and experimental results for devolatilizing biomass particles in an idealised entrained flow reactor [N. Guo et al., Fuel, ... -
Product formation during discharge: a combined modelling and experimental study for Li–O2 cathodes in LiTFSI/DMSO and LiTFSI/TEGDME electrolytes
(Peer reviewed; Journal article, 2021)Li–air or Li–O2 batteries are a promising energy storage technology due to the potentially high energy density. However, significant challenges related to reversible charge/discharge of these cells need to be solved. The ... -
Economic optimization for heatprosumer- based district heating systems in unidirectional heating markets
(Doctoral theses at NTNU;2022:18, Doctoral thesis, 2022) -
Space heating solution using solar heat from a PVT system
(Master thesis, 2021)Målet med masteroppgaven er å utvikle et romoppvarmingssystem med bruk av varme fra et solcelle/solfanger (PVT) system. Basert på dette ble tre forskningsspørsmål definert. The første spørsmålet er å beskrive og vurdere ... -
Computationally efficient coarse-graining XDEM/CFD modeling of fixed-bed combustion of biomass
(Peer reviewed; Journal article, 2022)In the multi-scale modeling of a dense particle system, the particle phase and the gas phase can be modeled on vastly different scales. The coupling between the two models has a critical influence on the predictions obtained ... -
CFD modeling of biomass combustion and gasification in fluidized bed reactors using a distribution kernel method
(Peer reviewed; Journal article, 2022)A three-dimensional reactive multi-phase particle-in-cell (MP-PIC) model is employed to investigate biomass combustion and gasification in fluidized bed furnaces. The MP-PIC model considered here is based on a coarse grain ... -
Developing guidelines for quantifying ecosystem impacts of terrestrial species invasion within the framework of Life Cycle Assessment
(Master thesis, 2021)Biologiske invasjoner utgjør en betydelig trussel mot funksjonen til økosystemer og samfunn rundt om i verden, og er en av de viktigste driverne for globalt tap av biologisk mangfold. Terrestriske invasive fremmede arter ... -
Circular Biogas Systems For New York’s Greater Hudson Valley
(Master thesis, 2021)New York State (NYS) has made great legislative strides in regards to climate change mitigation, excess food waste generation, and the renewable energy transition. Specifically, the NY Climate Act, the Food Donation & ... -
Coupling trade-offs and supply-demand of ecosystem services (ES): A new opportunity for ES management
(Peer reviewed; Journal article, 2021)The trade-offs and supply-demand relations of ecosystem services (ES) are at the frontier of geographical and ecological studies. However, previous studies have focused on either trade-offs or the supply-demand aspects, ... -
Utilizing IoT technology for healthy and energy efficient improvement of existing ventilation systems - Case study of indoor air quality in a primary school classroom using Arduino sensors and CONTAM simulations
(Master thesis, 2020)The residential and commercial building sector is responsible for a substantial amount of the worlds energy use and greenhouse gas emissions but is also one of the sectors that are best rigged to cut energy and emissions ... -
Retrofitting of Norwegian Office Buildings towards Nearly Zero Energy-Technical, Environmental, and Economic Aspects
(Doctoral theses at NTNU;2021:403, Doctoral thesis, 2021)The increasing proportion of energy use for buildings in urban environments has necessitated energy efficiency and advancement of the sustainable transformation of building stock towards the zero energy/emission level. In ... -
Influence of site, turbine height and wind direction on the performance of vertical-axis wind turbines on model buildings
(Master thesis, 2021)Vindturbiner som opererer i det bygde miljøet er utsatt for lavere gjennomsnittshastigheter og høyere turbulente svingninger enn i åpent terreng. Likevel er det regioner rundt bygninger der strømmen blir akselerert og hvor ... -
Global Shipping Emissions from a Well-to-Wake Perspective: The MariTEAM Model
(Peer reviewed; Journal article, 2021)Improving the robustness of maritime emission inventories is important to ensure we fully understand the point of embarkment for transformation pathways of the sector toward the 1.5 and 2°C targets. A bottom-up assessment ... -
A Flexible Model for Benchmarking the Energy Usage of Automotive Lithium-Ion Battery Cell Manufacturing
(Journal article; Peer reviewed, 2021)The increasing use of electric vehicle batteries in the world has a significant impact on both society and the environment. Thus, there is a need for the availability of transparent information on resource allocation. ... -
Investigation of integrated CO2 heat pumping systems for hotels in cold climates
(Doctoral theses at NTNU;2021:391, Doctoral thesis, 2021) -
Investigation of Hydrocarbon Two-phase Flow for Charge Reduced Heat Exchangers
(Doctoral theses at NTNU;2021:397, Doctoral thesis, 2021)Hydrocarbons off er an alternative to the HVAC industry as a natural working fluid with minimal environmental impact. The main challenge with hydrocarbons utilization is flammability which can be mitigated by reduction of ... -
An Ultra-Low Temperature Transcritical R744 Refrigeration System for Future Detectors at CERN LHC
(Peer reviewed; Journal article, 2021)The cooling systems of the future tracking detectors of the ATLAS and CMS experiments at the Large Hadron Collider (LHC) at CERN will be entirely based on CO2 refrigeration technology. The system is a booster refrigeration ...
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