Tor Hemmingsen
University of Stavanger
IonAnaerobic corrosionCatalysisElectrodeOrganic chemistryInorganic chemistryIntergranular corrosionChemistryMetallurgyMaterials scienceSeawaterCorrosionDithioniteSubseaCarbon steelCorrosion fatigueMultirotorSilver ionEnvironmental scienceComputer scienceCathodePlatinumSulfurElectrochemistryCarbon dioxideOxygenDroneAnode
45Publications
9H-index
328Citations
Publications 44
Newest
#1Yihan Xing (University of Stavanger)H-Index: 8
#2Muk Chen Ong (University of Stavanger)H-Index: 13
Last. Lorents Reinås (University of Stavanger)H-Index: 5
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Source
#1Jørgen Apeland (University of Stavanger)H-Index: 1
#2Dimitrios G. Pavlou (University of Stavanger)H-Index: 9
Last. Tor Hemmingsen (University of Stavanger)H-Index: 9
view all 3 authors...
The use of multirotor drones for industrial applications is accelerating, and fuel cell based propulsion systems are highlighted as a promising approach to improve endurance – one of the current main limitations. Due to multirotor drones’ unique requirements, careful system design is needed to maximize the performance advantage. In this work a sensitivity analysis that quantifies the impact of central system parameters for an X8 multirotor drone with a 2 kW fuel cell hybrid system is presented a...
Source
#1Nirosha D. Adasooriya (University of Stavanger)H-Index: 4
#2Wakshum Mekonnen Tucho (University of Stavanger)H-Index: 11
Last. Tor Hemmingsen (University of Stavanger)H-Index: 9
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Abstract The change in the mechanical properties of tempered high strength carbon steel (AISI 4130) due to hydrogen embrittlement (HE) has been investigated using slow strain rate tensile tests (SSRT). The heat treatment processes consisted of austenitization at 873 °C for about 45 min before quenching in salt bath and tempering at temperatures between 350 °C to 550 °C for about 1 h. The SSRT tests were performed on both hydrogen pre-charged and uncharged samples. Vickers hardness test was carri...
1 CitationsSource
#1Jørgen Apeland (University of Stavanger)H-Index: 1
#2Dimitrios G. Pavlou (University of Stavanger)H-Index: 9
Last. Tor Hemmingsen (University of Stavanger)H-Index: 9
view all 3 authors...
Industrial use of multirotor drones is gaining traction, and fuel cell based power sources have been identified as a way of improving the flight endurance from what is possible to achieve with current lithium-based battery options. The state-of-technology and barriers for further adoption are presented. It is found that there are lightweight options commercially available and that the viability of powering multirotor drones for long-range and high endurance missions is demonstrated. The barriers...
1 CitationsSource
#1Jørgen Apeland (University of Stavanger)H-Index: 1
#2Dimitrios G. Pavlou (University of Stavanger)H-Index: 9
Last. Tor Hemmingsen (University of Stavanger)H-Index: 9
view all 3 authors...
Increased flight time of multirotor drones is a key enabler for further adoption and industrial use of drones. A model for analyzing the performance of a fuel cell hybrid system for a multirotor drone is presented and applied for a case with an X8 multirotor drone with a maximum take-off mass of 25 kg. Endurance is the main performance parameter, and the model can be used to quantify the relative performance between different power sources. The model aims to determine if a specific hybrid fuel c...
4 CitationsSource
#1Nirosha D. Adasooriya (University of Stavanger)H-Index: 4
#2Dimitrios G. Pavlou (University of Stavanger)H-Index: 9
Last. Tor Hemmingsen (University of Stavanger)H-Index: 9
view all 3 authors...
6 CitationsSource
#1Nirosha D. Adasooriya (University of Stavanger)H-Index: 4
#2Tor Hemmingsen (University of Stavanger)H-Index: 9
Last. Dimitrios G. Pavlou (University of Stavanger)H-Index: 9
view all 3 authors...
1 CitationsSource
#1Nirosha D. Adasooriya (University of Stavanger)H-Index: 4
#2Tor Hemmingsen (University of Stavanger)H-Index: 9
Last. Dimitrios G. Pavlou (University of Stavanger)H-Index: 9
view all 3 authors...
1 CitationsSource
#1Utsav Raj Dotel (University of Stavanger)H-Index: 3
#2Fatemeh DavodiH-Index: 6
Last. Tor Hemmingsen (University of Stavanger)H-Index: 9
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Source
#1Nirosha D. Adasooriya (University of Stavanger)H-Index: 4
#2Tor Hemmingsen (University of Stavanger)H-Index: 9
Last. Dimitrios G. Pavlou (University of Stavanger)H-Index: 9
view all 3 authors...