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Skomedal, Gunstein
(2023).
Sørlandet - den nye batterikysten.
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Skomedal, Gunstein
(2023).
Innføring i solcelleteknologi.
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Skomedal, Gunstein
(2023).
Dette bør du vite om solceller før du bestemmer deg for å kjøpe.
[Newspaper].
Fædrelandsvennen.
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Skomedal, Gunstein
(2022).
Kurs i solstrøm - introduksjon.
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Skomedal, Gunstein
(2022).
Energilagring og batteri.
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Mortensholm, Stein ; Aamot, Eli; Grande, Tor & Skomedal, Gunstein
(2022).
Alt vi trenger å vite for å realisere batterieventyret.
[TV].
Arendalsuka.
Show summary
Forskning, industri og politikk møttes under Arendalsuka 2022 for å drøfte hva vi trenger å vite for å gjøre batterier til Norges største jobbskaper på 2020-tallet.
Medvirkende i arrangementet
Eli Aamot, konserndirektør SINTEF Industri
Tor Grande, prorektor for forskning, NTNU
Tove Nilsen Ljungquist, EVP Operations, Freyr
Ketil Aagesen, head of BlueVault Energy Storage, Siemens Energy AS
Gunstein Skomedal, produktsjef batterimaterialer, Vianode/Elkem
Jorodd Asphjell, stortingsrepresentant, Arbeiderpartiet
Lene Langemyr, varaordfører i Grimstad, Fremskrittspartiet
Møtet ble arrangert av SINTEF og NTNU. Samtalen ledes av Stein Mortensholm, kommunikasjonssjef i SINTEF Industri.
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Løvvik, Ole Martin; Flage-Larsen, Espen & Skomedal, Gunstein
(2019).
Atomistic simulations and machine learning methods for development of thermoelectric materials.
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Løvvik, Ole Martin; Berland, Kristian; Remonato, Filippo; Sagvolden, Espen; Flage-Larsen, Espen & Schrade, Matthias
[Show all 13 contributors for this article]
(2019).
Screening thermoelectric materials with ab initio atomistic modelling and machine learning techniques.
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Shyikira, Antoine de Padoue; Skomedal, Gunstein & Middleton, Peter Hugh
(2019).
Performance and stability of silicide based thermoelectric modules.
Show summary
Long-term studies on thermoelectric generator uni-couple based on N-type magnesium silicide (Mg2.01Si0.49Sn0.5Sb0.01) and P-type higher manganese silicide (Mn0.98Mo0.02Si1.73Ge0.02) materials are presented, in the operating temperature range of 2000C-4000C. Emphasis is put on the performance and reliability of the current collector configuration, especially, on the hot side of the module and on the thermomechanical stresses that are created during operation and lifetime testing, as a result of large temperature gradients experienced across the thermoelectric legs. With silver (Ag) paste as contact material, the long term-stability of the uni-couples were carried out on non-metalized legs and gold metalized legs under ambient conditions. Under isothermal and thermocycling tests, the non-metalized legs showed a gradual decrease in open circuit voltage (after a period of 200hours) and increase in internal resistance. In contrary, the metalized leg-based module was robust and stable for the same isothermal period, however, after 300cycles the n-type material showed mechanical failure (cracks) but the p-type resisted. Post-operation analysis by SEM/EDS and mechanical testing revealed that oxidation, adherence of the contact material and diffusion of the bonding material were the cause of performance degradation of the unicouples.
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Skomedal, Gunstein
(2019).
Podkast: Kan batteriene redde kloden?
[Radio].
https://www.uia.no/nyheter/podkast-kan-batteriene-redde-klod.
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Skomedal, Gunstein
(2019).
Solceller og batterier.
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Skomedal, Gunstein
(2019).
Etikk og Material - Litium-ion batterienes rolle i det grønne skiftet.
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Skomedal, Gunstein
(2019).
Etikk og Material - Litium-ion batterienes rolle i det grønne skiftet.
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Vehus, Tore; Skomedal, Gunstein; Kanas, Nikola & Middleton, Peter Hugh
(2018).
Hot side electrical contacts for
oxide thermoelectric modules.
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Shyikira, Antoine de Padoue; Skomedal, Gunstein; Middleton, Hugh P. & Sætre, Tor Oskar
(2018).
High Temperature Oxidation of Higher Manganese silicide and Alloys.
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Løvvik, Ole Martin; Flage-Larsen, Espen & Skomedal, Gunstein
(2018).
Screening silicide thermoelectric materials using ab initio transport calculations.
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Skomedal, Gunstein
(2017).
Dagens og fremtidens energisystem.
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Skomedal, Gunstein
(2017).
Materialer for fremtiden.
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Skomedal, Gunstein
(2017).
Energimaterialer for fremtiden.
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Skomedal, Gunstein
(2017).
Energimaterialer for fremtiden.
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Skomedal, Gunstein
(2017).
Long term stability testing of oxide unicouple thermoelectric modules.
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Skomedal, Gunstein
(2016).
Denne bilen går på telys.
[Journal].
Aftenposten Viten.
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Skomedal, Gunstein
(2016).
SOLCELLENERDEN.
[Newspaper].
Fædrelandsvennen.
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Skomedal, Gunstein
(2016).
Termoelektrisitet og Fornybar Energi.
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Skomedal, Gunstein
(2016).
Thermally activated degradation processes in thermoelectric materials and devices based on Skutterudites and Silicides.
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Skomedal, Gunstein
(2015).
Energishow.
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Skomedal, Gunstein
(2015).
www.solcellekysten.no.
Show summary
Blogg, guide og informasjon om installering og drift av solcelleanlegg samt mer generell informasjon om solenergi.
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Skomedal, Gunstein
(2015).
OXIDATION AND DECOMPOSITION OF THERMOELECTRIC MG2(SI-SN) SOLID SOLUTIONS.
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Skomedal, Gunstein
(2015).
Energishow.
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Skomedal, Gunstein
(2015).
Energimaterialer på UiA.
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Skomedal, Gunstein
(2015).
The influence of synthesis procedure on the microstructure and thermoelectric properties of p-type skutterudite Ce0.6Fe2Co2Sb12.
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Skomedal, Gunstein & Strandberg, Rune
(2015).
Framtida møtes best forlengs.
Fædrelandsvennen.
ISSN 0805-3790.
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Skomedal, Gunstein
(2014).
Hvordan er det å jobbe som forsker?
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Skomedal, Gunstein
(2014).
Termoelektrisitet.
[TV].
Innslag Schrødingers Katt, NRK1.
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Skomedal, Gunstein
(2014).
Lite lys og mykje varme - termoelektrisk spillvarmegjenvenning.
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Skomedal, Gunstein
(2013).
Vant Forsker Grand Prix Sør.
[Newspaper].
Grimstad Adressetidende.
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Skomedal, Gunstein
(2013).
Facinert av UiA's Sørlandslab-plan.
[Newspaper].
Agderposten.
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Skomedal, Gunstein
(2013).
www.termoelektrisitet.no.
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Skomedal, Gunstein
(2013).
Durability testing of multiple coated and uncoated CoSb3 unilegs.
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Skomedal, Gunstein; Øvrelid, Eivind Johannes & Espallargas, Nuria
(2010).
Tribological approach for understanding the multi wire sawing of Silicon wafers.
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Aigner, Birk Ludwig Schoder; Imenes, Anne Gerd & Skomedal, Gunstein
(2021).
System modeling and dispatch schedule optimization of combined PV battery system using linear optimization.
Universitetet i Agder.
Show summary
Energy storage plays a vital role in paving the way for more renewable penetration. The technology is costly, but intelligent solutions regarding dispatch strategies and system design can help reduce the total cost over the projected lifetime of a system.
For this thesis, a customizable linear programming algorithm is created within Python to optimize the battery energy scheduling based on generated PV power, electricity cost and load demand. The commercial system optimization tool HOMER is used to verify the code by running simulations based on historic data collected from NordPool and UiAs own photovoltaic system.
One benefit of the custom made code is its ability to do day-ahead optimization utilizing data from APIs. To obtain forecasted irradiation and temperature data the Solcast API was used as the only paid service for the Python script to ensure market-leading accuracy. Electricity prices were imported from the transparency platform Entsoe.
Implementing different incentives such as battery energy throughput and stored energy made it possible to alter the system behavior to optimize the system better while maintaining good working conditions for the battery. Carefully choosing the optimization parameters reduced battery cycling by 45.9% and average energy stored by 34.8% in two separate scenarios while maintaining cost savings. The case studied uses a power tariff power plan which means that the primary cost savings from including a battery come from peak shaving.
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Skomedal, Gunstein & Middleton, Peter Hugh
(2016).
Thermally activated degradation processes in novel thermoelectric for waste heat recovery.
Universitetet i Agder.
ISSN 1504-9272.