Øystein Ulleberg

• Hancke, Ragnhild; Bujlo, Piotr; Holm, Thomas & Ulleberg, Øystein (2024). High-pressure PEM water electrolyser performance up to 180 bar differential pressure. Journal of Power Sources. ISSN 0378-7753. 601. doi: 10.1016/j.jpowsour.2024.234271. Fulltekst i vitenarkiv
• Kesana, Netaji Ravikiran; Welahettige, Prasanna ; Hansen, Per Morten; Ulleberg, Øystein & Vågsæther, Knut (2023). Modelling of fast fueling of pressurized hydrogen tanks for maritime applications. International Journal of Hydrogen Energy. ISSN 0360-3199. 48(79), s. 30804–30817. doi: 10.1016/j.ijhydene.2023.04.142. Fulltekst i vitenarkiv
• Egeland-Eriksen, Torbjørn; Flatgård Jensen, Jonas; Ulleberg, Øystein & Sartori, Sabrina (2023). Simulating offshore hydrogen production via PEM electrolysis using real power production data from a 2.3 MW floating offshore wind turbine. International Journal of Hydrogen Energy. ISSN 0360-3199. 48(74), s. 28712–28732. doi: 10.1016/j.ijhydene.2023.03.471. Fulltekst i vitenarkiv Vis sammendrag

  This work presents simulation results from a system where offshore wind power is used to produce hydrogen via electrolysis. Real-world data from a 2.3 MW floating offshore wind turbine and electricity price data from Nord Pool were used as input to a novel electrolyzer model. Data from five 31-day periods were combined with six system designs, and hydrogen production, system efficiency, and production cost were estimated. A comparison of the overall system performance shows that the hydrogen production and cost can vary by up to a factor of three between the cases. This illustrates the uncertainty related to the hydrogen production and profitability of these systems. The highest hydrogen production achieved in a 31-day period was 17 242 kg using a 1.852 MW electrolyzer (i.e., utilization factor of approximately 68%), the lowest hydrogen production cost was 4.53 $/kg H2, and the system efficiency was in the range 56.1–56.9% in all cases.

• Hancke, Ragnhild; Holm, Thomas & Ulleberg, Øystein (2022). The case for high-pressure PEM water electrolysis. Energy Conversion and Management. ISSN 0196-8904. 261. doi: 10.1016/j.enconman.2022.115642. Fulltekst i vitenarkiv
• Fortin, Patrick; Gerhardt, Michael Robert; Ulleberg, Øystein; Zenith, Federico & Holm, Thomas (2022). Multi-Sine EIS for Early Detection of PEMFC Failure Modes. Frontiers in Energy Research. ISSN 2296-598X. 10. doi: 10.3389/fenrg.2022.855985. Fulltekst i vitenarkiv
• Balestra, Lorenzo; Yang, Ruochen; Schjølberg, Ingrid; Utne, Ingrid Bouwer & Ulleberg, Øystein (2021). Towards Safety Barrier Analysis of Hydrogen Powered Maritime Vessels. I ASME, Digital Collection (Red.), ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering Volume 6: Ocean Engineering. The American Society of Mechanical Engineers (ASME). ISSN 978-0-7918-8516-1. doi: 10.1115/OMAE2021-60451. Fulltekst i vitenarkiv
• Aarskog, Fredrik Gundersen; Danebergs, Janis; Strømgren, Trond & Ulleberg, Øystein (2020). Energy and cost analysis of a hydrogen driven high speed passenger ferry . International Shipbuilding Progress. ISSN 0020-868X. 67. doi: 10.3233/ISP-190273. Fulltekst i vitenarkiv
• Ulleberg, Øystein & Hancke, Ragnhild (2019). Techno-economic calculations of small-scale hydrogen supply systems for zero emission transport in Norway. International Journal of Hydrogen Energy. ISSN 0360-3199. 45(2), s. 1201–1211. doi: 10.1016/j.ijhydene.2019.05.170. Fulltekst i vitenarkiv
• Aarskog, Fredrik Gundersen; Hansen, Olav R.; Strømgren, Trond & Ulleberg, Øystein (2019). Concept risk assessment of a hydrogen driven high speed passenger ferry. International Journal of Hydrogen Energy. ISSN 0360-3199. s. 1–14. doi: 10.1016/j.ijhydene.2019.05.128. Fulltekst i vitenarkiv
• Tesfahunegn, Samson Gebre; Hajizadeh , Amin; Undeland, Tore Marvin; Ulleberg, Øystein & Vie, Preben Joakim Svela (2018). Modelling and control of grid-connected PV/fuel cell/battery hybrid power system. International Journal on Energy Conversion (IRECON). ISSN 2281-5295. 6(5), s. 168–176. doi: 10.15866/irecon.v6i5.16652.
• Vatani, Mohsen; Vie, Preben Joakim Svela & Ulleberg, Øystein (2018). Cycling Lifetime Prediction Model for Lithium-ion Batteries Based on Artificial Neural Networks. IEEE PES Innovative Smart Grid Technologies Conference Europe. ISSN 2165-4816. doi: 10.1109/ISGTEurope.2018.8571814.
• Bujlo, P.; Xie, C.J.; Shen, D.; Ulleberg, Øystein; Pasupathi, S & Pasciak, G. [Vis alle 7 forfattere av denne artikkelen] (2017). Hybrid polymer electrolyte membrane fuel cell–lithium- ion battery powertrain testing platform – hybrid fuel cell electric vehicle emulator. International Journal of Energy Research. ISSN 0363-907X. 41(11), s. 1596–1611. doi: 10.1002/er.3736.

Se alle arbeider i Cristin

• Jamma, Mustapha; Bujlo, Piotr & Ulleberg, Øystein (2023). Control and Power Management of Battery-PEM Fuel Cell Hybrid Power System for Marine Propulsion Systems.
• Holm, Thomas; Hancke, Ragnhild; Bujlo, Piotr & Ulleberg, Øystein (2023). High-Pressure PEM water electrolyser performance.
• Bujlo, Piotr; Holm, Thomas; Hancke, Ragnhild & Ulleberg, Øystein (2023). Experimental Set Up for PEM Fuel Cell Testing and Monitoring.
• Ulleberg, Øystein; Holm, Thomas & Hancke, Ragnhild (2023). Experimental Set Up for PEM Fuel Cell Testing and Monitoring.
• Ulleberg, Øystein (2023). MoZEES presentation.
• Ulleberg, Øystein (2023). Hydrogen og brenselsceller for maritime anvendelse.
• Ulleberg, Øystein (2023). Omstilling av tungtransport på land - Er det mulig å nå utslippsmål med løsninger basert på batterier og hydrogen?
• Jamma, Mustapha; Bujlo, Piotr & Ulleberg, Øystein (2023). Control and Power Management of Battery-PEM Fuel Cell Hybrid Power System for Marine Propulsion Systems.
• Ulleberg, Øystein (2023). Renewable Energy / Water Electrolysis: Systems Lessons Learned and Way Forward .
• Ulleberg, Øystein (2023). MoZEES Maritime Case Study- Hydrogen-driven High Speed Passenger Ferries.
• Ulleberg, Øystein (2023). Zero Emission Transport.
• Ulleberg, Øystein (2023). Nytt fra forskningsfronten.
• Jamma, Mustapha & Ulleberg, Øystein (2023). Control and Energy Management of Battery-PEM Fuel Cell Hybrid Power System for Domestic Ferry Applications.
• Ulleberg, Øystein (2023). R&D on Battery and Hydrogen Technology for Zero Emission Transport Applications .
• Ulleberg, Øystein; Helgesen, Geir & Hansen, Per Morten (2023). Modeling of Hydrogen Refueling Systems for Maritime Applications.
• Bujlo, Piotr; Holm, Thomas; Hancke, Ragnhild & Ulleberg, Øystein (2023). Experimental Set Up for PEM Fuel Cell Testing and Monitoring.
• Holm, Thomas; Hancke, Ragnhild; Bujlo, Piotr & Ulleberg, Øystein (2023). High-Pressure PEM water electrolyser performance.
• Bujlo, Piotr & Ulleberg, Øystein (2022). PEM Fuel Cell System Laboratory.
• Ulleberg, Øystein (2022). IFE Hynor Hydrogen Technology Center.
• Lunde-Hansen, Linda & Ulleberg, Øystein (2022). Safety in human operation during bunkering of liquid hydrogen- Preliminary findings of CRIOP scenario analysis.
• Ulleberg, Øystein (2022). Modeling of hydrogen refueling – work in progress.
• Ulleberg, Øystein (2022). Hydrogen for Zero Emission Transport - From R&D to Implementation.
• Ulleberg, Øystein (2022). Zero Emission Solutions for Heavy Duty Transport Applications.
• Ulleberg, Øystein (2022). Hydrogen Technology for Zero Emission Transport Applications. Vis sammendrag

  http://hfcnordic.dk/

• Ulleberg, Øystein (2022). R&D on Battery and Hydrogen Technology for Maritime Applications .
• Ulleberg, Øystein (2022). Green Hydrogen Production via Water Electrolysis.
• Ulleberg, Øystein (2022). Introduksjon til hydrogen. Vis sammendrag

  https://npf.no/konferansen/webinarhydrogen/

• Ulleberg, Øystein (2022). IFE Hynor - Hydrogen, sikkerhet og risiko. Vis sammendrag

  https://esra.no/sikkerhetsutfordringer-med-fornybar-energi/

• Ulleberg, Øystein (2022). Teknologiutvikling i Norge - Blått og grønt hydrogen, ulike veier inn.
• Hancke, Ragnhild; Bujlo, Piotr; Holm, Thomas & Ulleberg, Øystein (2022). High-Pressure PEMWE Stack and System Characterization.
• Hancke, Ragnhild; Bujlo, Piotr; Holm, Thomas & Ulleberg, Øystein (2022). Performance of high pressure PEM water electrolysis system.
• Ulleberg, Øystein (2021). Maritime Hydrogen Risk Management.
• Ulleberg, Øystein (2021). Hydrogen Research & Development - Opportunities for Collaboration .
• Ulleberg, Øystein (2021). EASAC Report - Key Findings & Results.
• Ulleberg, Øystein (2021). Hydrogen og batterier–Sikkerhetsutfordringer ved anvendelse i nye energisystemer og oppskalering.
• Ulleberg, Øystein (2021). MoZEES Hydrogen Roadmaps.
• Ulleberg, Øystein (2021). Nullutslipp transport med batterier og hydrogen.
• Ulleberg, Øystein (2021). Modeling and simulation of hydrogen bunkering systems for maritime applications.
• Ulleberg, Øystein (2021). Zero Emission Heavy Duty Transport – The Norwegian Approach.
• Hancke, Ragnhild; Bujlo, Piotr & Ulleberg, Øystein (2021). Design & Testing of a High-Pressure PEM Water Electrolyzer System Test Rig.
• Hancke, Ragnhild; Bujlo, Piotr & Ulleberg, Øystein (2021). High-Pressure PEM Water Electrolysis Stack and System Characterization . Fulltekst i vitenarkiv
• Aarskog, Fredrik Gundersen; Danebergs, Janis; Strømgren, Trond & Ulleberg, Øystein (2020). Energy and cost analysis of a hydrogen driven high speed passenger ferry.
• Ulleberg, Øystein (2020). Hydrogen for Zero-Emission Transport .
• Ulleberg, Øystein (2020). Decarbonization of Transport: A Norwegian perspective on Zero-Emission Transport.
• Ulleberg, Øystein (2020). Zero Emission Transport in Norway: New Markets and Applications . Vis sammendrag

  Overview of transport markets in the EU and battery electric vehicle market in Norway. Issues related to sector coupling between energy and transport systems. Overview of MoZEES-project and results from hydrogen truck feasibility study.

• Ulleberg, Øystein (2020). Renewable Energy & Zero-Emission Electrical Transport Systems.
• Ulleberg, Øystein (2020). Heavy-Duty Transport and Hydrogen in the Maritime.
• Hansen, Olav R. & Ulleberg, Øystein (2020). Hydrogen Safety in the Maritime. Vis sammendrag

  Joint Session with the IPHE Regulations, Codes, Standards & Safety Working Group on Maritime Considerations. Norwegian learning experiences: 1. Most important safety issues on hydrogen vessels 2. Risk and explosion study required to class a hydrogen vessel 3. Research priorities on compressed hydrogen tanks and liquid hydrogen 4. Recommendation with respect to rules

• Ulleberg, Øystein (2020). MoZEES Maritime Case Study and H2Maritime Project. Vis sammendrag

  Presentation of MoZEES Maritime Case Study (Part 2): Method to estimate Hydrogen Demand and Total Cost of Ownership of Ferries and other Vessels Presentation of H2Martime Project: Hydrogen and Fuel Cell for Maritime Applications

• Hancke, Ragnhild & Ulleberg, Øystein (2020). Hydrogen application in the Norwegian transport sector.
• Ulleberg, Øystein (2019). Innspill fra Institutt for energiteknikk.
• Ulleberg, Øystein (2019). Forsker vil ha trykksatt framfor flytende hydrogen til skip for å unngå «Tesla-fellen». [Fagblad]. https://tu.no.
• Ulleberg, Øystein (2019). Hydrogen i transport. [Fagblad]. https://nelhydrogen.com/press-release/press-release-invitati.
• Ulleberg, Øystein (2019). Hydrogeneksplosjonen ved Uno-X Hydrogenstasjonen på Kjørbo. [Radio]. https://radio.nrk.no/serie/ukeslutt.
• Ulleberg, Øystein (2019). Sandvika-eksplosjonen: Forsker frykter at hydrogenutviklingen vil stoppe opp. [Internett]. https://e24.no.
• Ulleberg, Øystein; Gillett, William; Boulouchos, Konstantinos; Duic, Neven & Giannopoulos, George (2019). Decarbonisation of Transport – Policy Options and Ethical Challenges.
• Ulleberg, Øystein (2019). Integrated Energy and Transport Systems - From Decarbonization to Zero Emission.
• Ulleberg, Øystein (2019). Renewable Energy based Water Electrolysis.
• Ulleberg, Øystein (2019). Hydrogen i transportsektoren.
• Ulleberg, Øystein (2019). Batteri- og hydrogenteknologi for maritim sektor.
• Ulleberg, Øystein (2019). Batteri- og hydrogenteknologi for nullutslipp i transport.
• Hancke, Ragnhild; Ulleberg, Øystein; Skattum, Ragnar; Torp, Vidar & Jensen, Jan-Erik (2019). High Differential Pressure PEMWE System Laboratory. Fulltekst i vitenarkiv
• Fridstrøm, Lasse; Eskeland, Gunnar & Ulleberg, Øystein (2019). Decarbonising shipping. [Internett]. PODCAST.
• Fridstrøm, Lasse; Ulleberg, Øystein & Eskeland, Gunnar (2019). Decarbonising the highway. [Internett]. PODCAST.
• Fridstrøm, Lasse; Eskeland, Gunnar & Ulleberg, Øystein (2019). Dekarbonisering av sjøveien. [Internett]. PODCAST.
• Ulleberg, Øystein (2018). Hydrogen til maritim transport Hvordan bør vi gå fram? Er det trygt?
• Ulleberg, Øystein (2018). Hydrogenteknologi for maritim transport.
• Ulleberg, Øystein & Aarskog, Fredrik (2018). MoZEES Maritime Case Study on a Hydrogen and Fuel Cell Driven High Speed Passenger Ferry.
• Ulleberg, Øystein (2018). På vei mot et helelektrisk transportsystem - Hva er utviklingstrekkene?
• Ulleberg, Øystein (2018). MoZEES - Mobility Zero Emission Energy Systems. Vis sammendrag

  Presentasjon av MoZEES

• Ulleberg, Øystein & Hancke, Ragnhild (2018). Local Hydrogen Supply for Zero Emission Transport. Vis sammendrag

  The supply of hydrogen for zero emission transport is challenging, especially if the hydrogen is to be produced locally based on renewable energy sources. In order to claim zero emission in the full value chain (from production to utilization), it is necessary to avoid CO2-emissions from the production and distribution of hydrogen. In countries where the fraction of renewable power is very high, such as in Norway (nearly 100% with hydroelectric power), it is natural consider water electrolysis as the main production method. Reforming of natural gas with CO2-capture and storage is also an option, but this can only be realized in large centralized plants designed to capture and store several million tonnes of CO2 per year. Hence, our options today are limited to reforming of biogas and renewable energy based water electrolysis. The focus in Norway is today on the development of water electrolysis based hydrogen supply systems. In Norway there is currently a national discussion on how and where to build up hydrogen refueling infrastructure. Some argue that a national network of 700 bar hydrogen refueling stations must be established as soon as possible so that the market for fuel cell passenger cars can be allowed to grow faster, while others argue that we should focus on establishing 350 bar stations for fleet vehicles such as trucks and buses. On-site small water electrolyzer systems are modular, and can be developed for many different sizes and capacities. Hydrogen can also be trucked in from a centralized hydrogen production plant to the hydrogen refueling stations. A combination with some local hydrogen supply (via water electrolysis) and some trucked in hydrogen may also be an option. The focus in this presentation is on 350 bar systems for fleets of heavy duty fuel cell vehicles (trucks). A techno-economic modelling tool which can be used to estimate the costs of different designs of water electrolysis based hydrogen refueling stations has been developed at IFE. This tool has been applied to different case studies over the past few years. The program developed can be adjusted and used to access the techno-economics of a wide range of renewable power based water electrolyzers systems, including hydrogen compression, storage and dispensing systems. The models are based on up-to-date technical performance data obtained from leading PEM and alkaline water electrolyzer and other hydrogen technology suppliers around the world, and cost data collected in various projects conducted at IFE over the past few years. Results from techno-economic analyses of 350 bar hydrogen refueling stations (based on water electrolysis) show how it is possible to find cost-effective system designs for small fleets of heavy duty vehicles.

• Vatani, Mohsen; Vie, Preben Joakim Svela & Ulleberg, Øystein (2018). Cycling Lifetime Prediction Model for Lithium-ion Batteries Based on Artificial Neural Networks.
• Ulleberg, Øystein & Aarskog, Fredrik (2017). Hydrogen og batterier trenger ikke være enten eller. Kanskje er den ultimate løsningen hybrid. [Fagblad]. Teknisk ukeblad (TU).
• Ulleberg, Øystein (2017). Ekspertintervjuet: På vei mot ren transport. [Fagblad]. Energi og Klima.
• Ulleberg, Øystein (2017). MoZEES - Mobility Zero Emission Energy Systems. Vis sammendrag

  Presentation of MoZEES, a new Norwegian research center on zero emission transport with focus on battery and hydrogen technology

• Ulleberg, Øystein (2017). Techno-Economic Modeling of Renewable Energy Hydrogen Supply Systems based on Water Electrolysis. Vis sammendrag

  There is a growing interest for using renewable power to run water electrolyzers for on-site production of hydrogen for supply to various energy, industrial, and transport applications. How can such systems become cost-efficient? A techno-economic modelling tool has been developed in order to try to answer this question. On-site small water electrolyzer systems are modular, and can be developed for many different sizes and capacities. Several international companies supply on-site hydrogen production system, and the technology readiness level is high (TRL 7-9). However, on a system level it is still necessary to develop more energy and cost-efficient solutions. In order to achieve this it will be necessary to both reduce the amount of materials used in the key components (e.g. cells and stacks) and to develop more efficient overall balance of plants (e.g. drying, compression, and storage, and electrical systems). A simplified equation based techno-economic modelling tool has been developed in EES (Engineering Equation Solver program). This program can adjusted and used to access the techno-economics of a wide range of renewable power based water electrolyzers systems, including hydrogen compression, storage and dispensing systems. The models are based on up-to-date technical performance data obtained from leading PEM and alkaline water electrolyzer and other hydrogen technology suppliers around the world, and cost data collected in various projects conducted at IFE over the past few years. The modelling tool has been applied in to evaluate the economic viability (business case) for both large-scale (4-5 MW) and small-scale (150-200 kW) hydro-electric power based water electrolysis systems. The techno-economic viability of a system (Figure) connected to a small-scale hydro-electric power plant in Norway is presented.

• Ulleberg, Øystein (2017). Towards Zero Emission Transport - A Norwegian Perspective. Vis sammendrag

  Presentation of MoZEES, a new Norwegian research center for climate friendly energy with focus on zero emission transport using battery and hydrogen technology.

• Ulleberg, Øystein & Gjerløw, Jan Carsten (2017). Hydrogenproduksjon ved småkraftverk: Case studie Rotnes Bruk. Vis sammendrag

  Hovedformålet med prosjektet har vært å analysere og evaluere de tekno-økonomiske aspektene vedrørende hydrogenproduksjon fra småkraftverk, og skissere hvordan implementering av en eventuell hydrogenproduksjon ved Rotnes Bruk kraftverk i Nittedal kan gjennomføres. To ulike konsepter (case) for produksjon av hydrogen via vannelektrolyse med kraft fra Rotnes Bruk, videre kompresjon, lagring, distribusjon og anvendelse i transport har blitt evaluert. En sammenligning av de to ulike konseptene viser at lokal produksjon og distribusjon (Case 1) kan være å anbefale, men dette krever en god og langsiktig avtale for henting og distribusjon av hydrogen. Produksjon med lokal hydrogenstasjon i Nittedal (Case 2), krever at det etableres en lokal kjøretøysflåte, og gir i så måte en litt mer utfordrende forretningsmodell. Lokal produksjon av hydrogen ved Rotnes Bruk gir en hydrogen-produksjonskostnad på 109 NOK/kg (129 NOK/kg, inkl. frakt og levering til en hydrogenstasjon i regionen). Med 50 % investeringsstøtte vil det være mulig å komme ned i 66 NOK/kg (86 NOK/kg, inkl. frakt og levering). Dette er høyere enn dagens markedspris ved hydrogenstasjoner (72 NOK/kg). Hydrogenproduksjon ved Rotnes Bruk kan være økonomisk interessant i en tidlig fase av markedsutviklingen, men på sikt så vil trolig ikke et småskalaanlegg på 200 kW kunne konkurrere med større anlegg på noen MW. Årsaken til dette er de relativt høye investeringskostnadene; mer kostnadseffektive småskala vannelektrolysører og hydrogenkompressorer må derfor utvikles dersom dette skal bli lønnsomt. Rapporten gir noen anbefalinger på hva som kreves for å få økonomi i tilsvarende hydrogenprosjekter ved andre småkraftverk i Norge. Prosjektet er finansiert av Norges vassdrags- og energidirektorat (NVE), og en del av et større prosjekt ved Småkraftforeningen om hydrogenproduksjon ved småkraftverk. Dette arbeidet er publisert i en åpen rapport fra Institutt for energiteknikk (IFE-KR-E-2017-001)

• Ulleberg, Øystein (2017). Hydrogenproduksjon og vannelektrolyse. Vis sammendrag

  Norge har tilgang til store mengder med fornybar kraft, som blant annet kan benyttes til å produsere hydrogen. Hydrogenproduksjon via vannelektrolyse er kjent teknologi. Tradisjonelt har de største vannelektrolyseanleggene (MW-klasse) blitt koblet opp mot kraftsystemer med rikelig tilgang på stabil vannkraft (ref. Norge). I løpet av de siste årene har det også blitt utviklet ny teknologi som gjør det mulig å kjøre vannelektrolysører som kan følge svingninger i kraftproduksjonen, som f.eks. pga. variabel sol- og vindkraft (ref. Tyskland). I EU finnes det nå store FoU-programmer på hydrogen der det fokuseres på utvikling av neste generasjon med avanserte vannelektrolysesystemer, og på hvordan denne nye teknologien kan integreres i eksisterende og framtidige kraftsystemer. Flere studier viser at hydrogen produsert fra fornybar kan bidra til store reduksjoner i klimagassutslipp. Det bør her fokuseres på hydrogen til industrielle formål (erstatning til reformert hydrogen med CO2-utslipp), og som drivstoff til transportsektoren. Det finnes i dag batteri- og hydrogenteknologi som kan tas i bruk i lettere kjøretøyer. I Norge er det satt ambisiøse mål som skal lede til lav- og nullutslipp i transport, men dette vil kreve forskning og utvikling på batteri- og hydrogenteknologi som kan introduseres i tyngre transportapplikasjoner (vei, bane og sjø). Dette er motivasjonen for å etablere MoZEES (Mobility Zero Emission Energy Systems), et nasjonalt forskningssenter for miljøvennlig energi (FME) med fokus på batterier og hydrogen for nullutslipp i transportsektoren. Hovedformålet med denne FME’en vil være å bidra til utvikling av nye batteri- og hydrogenmaterialer, -komponenter og -systemer for eksisterende og framtidige applikasjoner innen transportsektoren (vei, bane og sjø). Forskningssenteret skal bidra til design og utvikling av sikre, pålitelige og kostnadseffektive nullutslippsløsninger for transport, inkludert FoU på hydrogenproduksjon via vannelektrolyse. Den siste forskningen og utviklingen innen vannelektrolyse, og eksempler på nye innovative hydrogensystemløsninger for eksisterende og framtidige kraftsystemer ble presentert.

• Lunde-Hanssen, Linda Sofie & Ulleberg, Øystein (2023). H2 Safety in Human Operations – and Safety guideline. Institutt for energiteknikk. ISSN 978-82-7017-945-9. Fulltekst i vitenarkiv
• Schjølberg, Ingrid; Utne, Ingrid Bouwer & Ulleberg, Øystein (2022). Design of hybrid fuel cell & battery systems for maritime vessels. Norges teknisk-naturvitenskapelige universitet. ISSN 2703-8084.
• Tuset, Jørgen Kristoffer; Ulleberg, Øystein; Sartori, Sabrina & Hancke, Ragnhild (2021). Modelling and Validation of a Fuel Cell Electric Bus. Universitetet i Oslo.
• Jensen, Jonas Flatgård; Sartori, Sabrina; Ulleberg, Øystein & Ragnhild, Hancke (2021). Proton Exchange Membrane Water Electrolyzer Modeling - Performance during dynamic operation. Universitetet i Oslo.
• Østigård, Morten; Sartori, Sabrina; Ulleberg, Øystein & Gunnæs, Anette E. (2019). Advanced Modelling of NiMH Batteries: Integrating Renewable Energy Sources into EV Charging Stations. Universitetet i Oslo. Vis sammendrag

  This thesis is devoted to the topic of energy storage system modelling, and to the integration of such systems to increase the utilisation of renewable energy. In particular, the use of a nickel-metal hydride battery storage system is considered in combination with energy produced by solar and wind to power an electric vehicle fast-charging station situated in Norway. The thesis aims to develop a flexible model for the battery energy storage system that can accurately describe battery performance and performance-reducing effects. The motivation of which is to be able to evaluate the feasibility of the charging topology in mention. A semi-empirical, battery model based on real data is designed and implemented in the Simulink modelling environment. Further, a system model is developed in the same modelling environment which uses actual data from Norwegian renewable energy producers and charging station operators. We report on the influence of renewable energy mixture, capacity sizing, production sizing and vehicle charging behaviour on the feasibility of the topology. The thesis is written as a contribution of the now finished project INTEGRARE (Intelligent prediction and integration of renewable energy sources into the Norwegian electricity grid, headed by the Department of Technology Systems). The topic is in line with an ongoing effort in the energy storage system research group to promote, design, model and validate the feasibility of energy systems powered by renewable energy sources.

• Danebergs, Janis; Ulleberg, Øystein & Nordgreen, Thomas (2019). Techno-economic Study of Hydrogen as a Heavy-duty Truck Fuel, A Case Study on the Transport Corridor Oslo – Trondheim. Digitala Vetenskapliga Arkivet. Vis sammendrag

  Norway has already an almost emission-free power production and its sales of zero-emission light-duty vehicles surpassed 30% in 2018; a natural next challenge is to identify ways to reduce emissions of heavy-duty vehicles. In this work the possibilities to deploy Fuel Cell Electric Trucks (FCET) on the route Oslo-Trondheim are analyzed by doing a techno-economic analysis. The literature study identified that in average 932 kton goods where transported between the cities. The preferred road choice goes through Østerdalen and that an average load for a long-distance truck is 16 tons. The methodology used in the study is based on cost curves for both truck and infrastructure, and a case study with various scenarios is evaluated to find a profitable business case for both an FCET fleet and its infrastructure. The cost curves for trucks are based on total cost of ownership (TCO) as a function of hydrogen price, while the levelized cost of hydrogen (LCOH) is used to present the cost of infrastructure. An analysis was made to identify the trucks component sizes and a FCET for this route would require an onboard hydrogen storage of 46 kg, a fuel cell stack with a nominal power of 200 kW, a battery of 100 kWh (min SOC 22%), and an electric motor with a rated power of 402 kW. TCO was calculated both for an FCET based on the dimensioned components and a biodiesel truck. The results show that an FCET purchased in 2020 can be competitive with biodiesel with a hydrogen price of 38.6 NOK/kgH2. While the hydrogen price can increase to 71.8 NOK/ kgH2 if the FCET is purchased in 2030. To identify the most suitable infrastructure, four different designs of hydrogen refueling stations (HRS) were compared. Furthermore, hydrogen production units (HPUs) with both alkaline or PEM type water electrolyzer were compared. The analysis in this study showed that the most cost competitive option was a 350-bar HRS without cooling, which only can serve type III onboard storage tanks. A HPU with alkaline electrolyzer was the most price competitive alternative. In case each HRS is refueling more than 7 FCETs per day, an HPU in direct connection to HRS is the preferred infrastructure setup. Three HRS are required along the route to ensure a minimum service level for the FCETs. When the TCO of the fuel cell truck and LCOH of the hydrogen infrastructure were compared for a 2020 scenario, no feasible solution was identified. The cost of installing three HRS in 2020, serving a fleet of 14-24 trucks, would cost 16.0 – 17.6 million NOK/year more than a fleet based on biodiesel trucks. In a future scenario, where both the FCET and infrastructure costs decrease due to expected learning curves, a business case can be found if at least 5 FCETs were refueling at each HRS on daily basis, which corresponds to a total fleet of approx. 24 FCETs. Finally, a set of clear recommendations on how to improve the techno-economic analysis in future studies are provided. Both by identifying areas lacking sufficient documentation and by providing steps how the tecno-economic model could be enhanced.

• Tomasgard, Asgeir; Berstad, David Olsson; Blekkan, Edd Anders; Karstad, Per Ivar; Burheim, Odne Stokke & Dawson, James [Vis alle 16 forfattere av denne artikkelen] (2019). Hydrogen i fremtidens lavkarbonsamfunn. Center for Sustainable Energy Research (CenSES), NTNU. ISSN 978-82-93198-31-4.
• Bettzüge, Marc Oliver; Blok, Kornelius; Bradshaw, Alex; Bruce, Peter; Duic, Neven & Frank, Harry [Vis alle 19 forfattere av denne artikkelen] (2019). Decarbonisation of transport: Options and challenges. European Academies' Science Advisory Council (EASAC Secretariat). ISSN 978-3-8047-3977-2. Vis sammendrag

  This report was triggered by discussions between members of the European Academies’ Science Advisory Council’s (EASAC’s) energy steering panel on the challenges faced by the European Union (EU) in the light of the Paris Agreement; in particular, the challenge of reducing emissions from the transport sector, which relies almost totally on fossil fuels. It was also stimulated by the EU energy and climate package, which was released in November 2016, entitled ‘Clean Energy for all Europeans‘, and the three packages of the EU initiative ‘Europe on the Move‘. A group of 18 experts, who had each been nominated by their national science academies, came together in July 2017 to discuss the decarbonisation of transport at a workshop with officials from six Directorates- General of the European Commission (Mobility and Transport (MOVE); Energy (ENER); Climate Action (CLIMA); Environment (ENV); Regional and Urban Policy (REGIO); and Joint Research Centre (JRC)) as well as experts from the International Transport Forum within the Organisation for Economic Cooperation and Development (ITF-OECD), the European Automobile Manufacturers’ Association (ACEA) and Local Governments for Sustainability (ICLEI). During the workshop, it was noted that greenhouse gas (GHG) emissions from the European transport sector currently represent approximately 24% of total GHG emissions from the EU and that, within this sector, the emissions were dominated by those from road transport (72%): those from passenger cars and light-duty vehicles (LDVs) amounted to about 53% and those from buses and heavy goods vehicles to about 19%. After the workshop, it was concluded that EASAC should focus on the biggest challenge, namely road transport. This report therefore examines decarbonisation of road transport, with only brief comments on rail, maritime and aviation transport. It has separate chapters on demand and supply perspectives, and adopts a framework for tackling these challenges using sustainable solutions for the long term and transitional solutions for the short term.

• Ulleberg, Øystein & Gjerløw, Jan Carsten (2017). Hydrogenproduksjon ved småkraftverk. Case studie Rotnes Bruk. Institutt for energiteknikk. ISSN 978-82-7017-904-6. Fulltekst i vitenarkiv

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