Blar i Institutt for energi og prosessteknikk på forfatter "Wahl, Markus Solberg"
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Addressing Challenges in Fabricating Reflection-2 Based Fiber Optic Interferometers
Wahl, Markus Solberg; Wilhelmsen, Øivind; Hjelme, Dag Roar (Journal article; Peer reviewed, 2019)abrication of multimode fiber optic interferometers requires accurate control of certain parameters to obtain reproducible results. This paper evaluates the consequences of practical challenges in fabricating reflection-based, ... -
Combined temperature and RI sensor for exploring the phase transitions of ethanol solutions
Wahl, Markus Solberg; Wilhelmsen, Øivind; Hjelme, Dag Roar (Chapter, 2018)A fiber optic interferometer based on core diameter mismatch is used in reflection mode to study the behavior of ethanol solutions with regards to concentration dependent thermal properties and phase transitions. A method ... -
Electrifying AtB’s metro bus line 1 with implementation of megawatt charging system
Servold, Vidar; Dalseg, Martin Mziray; Styve, Martin Abeler (Bachelor thesis, 2023)På grunn av politiske avtaler og et felles mål om bærekraftig utvikling har AtB som mål å elektrifisere hele bussparken i Trondheim. Denne oppgaven har som mål å gjennomføre et mulighetsstudie vedrørende utvikling av en ... -
Ice formation and growth in supercooled water–alcohol mixtures: Theory and experiments with dual fiber sensors
Wahl, Markus Solberg; Aasen, Ailo; Hjelme, Dag Roar; Wilhelmsen, Øivind (Peer reviewed; Journal article, 2020)Increased knowledge on fluid-solid phase transitions is needed, both when they are undesired and can impair processes operation, and when strict control is required in fields such as food technology, the pharmaceutical ... -
The Importance of Optical Fibres for Internal Temperature Sensing in Lithium-ion Batteries during Operation
Wahl, Markus Solberg; Spitthoff, Lena; Muri, Harald Ian; Jinasena, Asanthi; Burheim, Odne Stokke; Lamb, Jacob Joseph (Journal article; Peer reviewed, 2021) -
In-situ measurements of lithium-ion concentrations in a lithium-ion battery using fiber-optical sensors
Åtland, Magnus (Master thesis, 2023)I denne oppgaven er en single-mode optisk fiber implementert i et litium-ion batteri (LiB) for å måle endringen i konsentrasjonen i batteriet. Ettersom behovet for energilagring øker, på grunn av vekst i fornybar ... -
Incremental capacity analysis (dQ/dV) as a tool for analysing the effect of ambient temperature and mechanical clamping on degradation
Spitthoff, Lena; Vie, Preben Joakim Svela; Wahl, Markus Solberg; Wind, Julia; Burheim, Odne Stokke (Peer reviewed; Journal article, 2023)This work presents a comprehensive degradation study of two types of large lithium-ion pouch cells; 26 NMC532/Graphite (64 Ah) and 9 NMC433/Graphite (31 Ah) pouch cells. The cells were degraded under different cycling ... -
Internal Temperature measurements in Li-ion Pouch Cell using FBG
Østby,Frode (Master thesis, 2021)I denne masteroppgaven har det blitt forsøkt å implementert FBG-sensorer i forhåndsproduserte lithium-ion batterier for intern temperaturmåling. Det ble brukt glasskapillærer for å isolere sensorene slik at de kun regaerte ... -
Investigation of Rate Capability and Mass Transfer Dynamics in Lithium-ion Batteries
Bua, Tone Gregersen (Master thesis, 2023)Det forventes at litiumionebatterier kommer til å ha en betydelig stor del av å oppnå netto nullutslippet under den grønne omstillingen verden i dag står ovenfor. Det er nødvendig å utforske nye og mer bærekraftige ... -
Measuring the Cooling Capability of Lithium-Ion Batteries
Athisayamohan, Silvia (Master thesis, 2023)Denne oppgaven har som formål å evaluere kjøleevnen til litium-ionbatterier. Temperatur har vist seg å ha en betydelig innvirkning på levetiden til batteriene. Et hensiktmessig kjølesystem og en optimalisert utforming av ... -
On the Relations between Lithium-Ion Battery Reaction Entropy, Surface Temperatures and Degradation
Spitthoff, Lena; Wahl, Markus Solberg; Lamb, Jacob Joseph; Shearing, Paul Robert; Vie, Preben Joakim Svela; Burheim, Odne Stokke (Peer reviewed; Journal article, 2023)Understanding and mitigating the degradation of batteries is important for financial as well as environmental reasons. Many studies look at cell degradation in terms of capacity losses and the mechanisms causing them. ... -
Online Internal Temperature Sensors in Lithium-Ion Batteries: State-of-the-art and Future Trends
Jinasena, Asanthi; Spitthoff, Lena; Wahl, Markus Solberg; Lamb, Jacob Joseph; Shearing, Paul Robert; Strømman, Anders Hammer; Burheim, Odne Stokke (Peer reviewed; Journal article, 2022)The temperature of the lithium-ion battery is a crucial measurement during usage for better operation, safety and health of the battery. In-situ monitoring of the internal temperature of the cells is an important input for ... -
Thermal Properties of Semi-solid State Lithium-ion Batteries
Dyb, Emil Gjerde; Høgseth, Øyvind Kristoffer; Kigen, Kristian Lossius Skogrand (Bachelor thesis, 2022)Formålet med denne bacheloroppgaven er å undersøke termisk ledningsevne, spesifikk varmekapasitet og varmegenerering i semi-solid state litium-ion batterier (LIB), og sammenligne disse med de termiske egenskapene til ... -
Thermal transport in lithium-ion batteries: The effect of degradation
Spitthoff, Lena; Wahl, Markus Solberg; Vie, Preben Joakim Svela; Burheim, Odne Stokke (Peer reviewed; Journal article, 2023)In this work, we report thermal conductivities of pristine and degraded electrodes, from commercial lithium-ion batteries. The thermal conductivities were measured with and without electrolyte solvent and at different ... -
Using Fiber-Optic Sensors to Give Insight into Liquid-Solid Phase Transitions in Pure Fluids and Mixtures
Wahl, Markus Solberg; Wilhelmsen, Øivind; Hjelme, Dag Roar (Peer reviewed; Journal article, 2020)Fiber optic sensors offer a new and unique way to detect and analyze phase transitions, due to their small thermal mass and inert material. This paper presents and demonstrates a dual-sensor system to detect and analyze ...