Blar i Institutt for industriell økonomi og teknologiledelse på forfatter "Fagerholt, Kjetil"
-
A MIP-based heuristic for a single trade routing and scheduling problem in roll-on roll-off shipping
Hansen, Jone Reinlund; Fagerholt, Kjetil; Meisel, Frank (Journal article; Peer reviewed, 2022)We study a single trade ship routing and scheduling problem for a roll-on roll-off shipping company. Along the given trade, there is a number of contracts for transportation of cargoes between port pairs. Each contract ... -
Modeling a Supply Chain for Carbon Capture and Offshore Storage - A German-Norwegian Case Study
Bennæs, Anders; Skogset, Martin; Svorkdal, Tormod; Fagerholt, Kjetil; Herlicka, Lisa; Meisel, Frank; Rickels, Wilfried (Peer reviewed; Journal article, 2023)Carbon capture and storage (CCS) for industrial emission point sources is one of the potential instruments to achieve net-zero carbon dioxide () goals. However, emission point sources and storage formations are often far ... -
Modelling Approaches for Maritime Fleet Deployment with Speed Optimization and Voyage Separation Requirements
Borander, Venke; Straume, Anders (Master thesis, 2018)This thesis studies the fleet deployment problem within the liner shipping segment of the shipping industry. A shipping company has a predefined set of intercontinental trade routes, and serves numerous voyages on each ... -
Network Design for Zero Emission Passenger Vessel Services
Havre, Håkon Furnes; Lien, Ulrik; Ness, Mattias Myklebust (Master thesis, 2022)Denne masteroppgaven studerer mulighetene for å erstatte konvensjonelle hurtigbåter med batteri-elektriske hurtigbåter. På et generelt nivå, undersøker vi hvorvidt tekniske og økonomiske utfordringer kan omgås ved god ... -
Network design with route planning for battery electric high-speed passenger vessel services
Havre, Håkon Furnes; Lien, Ulrik; Ness, Mattias Myklebust; Fagerholt, Kjetil; Rødseth, Kenneth Løvold (Peer reviewed; Journal article, 2023)This paper studies the Zero Emission passenger Vessel Service Network Design Problem (ZEVSNDP) in order to investigate how technical and economic challenges related to diffusion of battery electric vessels can be alleviated ... -
Novel Optimization Models for Complex Planning Problems in Maritime Transportation
Dong, Bo (Doctoral theses at NTNU;2020:370, Doctoral thesis, 2020)The purpose of this PhD thesis is to develop novel optimization models and formulations for three important planning problems in maritime transportation. Application of the operations research methods in the thesis can ... -
Offshore supply planning in a rolling time horizon
Fernandez Cuesta, Eirik; Andersson, Henrik; Fagerholt, Kjetil (Journal article; Peer reviewed, 2018)This paper presents a real transportation problem stemming from offshore oil and gas logistics and shows how optimization models used in a rolling horizon simulation framework can be very valuable to assess and improve the ... -
On two speed optimization problems for ships that sail in and out of emission control areas
Fagerholt, Kjetil; Psaraftis, Harilaos (Journal article; Peer reviewed, 2015)This paper deals with two speed optimization problems for ships that sail in and out of Emission Control Areas (ECAs) with strict limits on sulfur emissions. For ships crossing in and out of ECAs, such as deep-sea vessels, ... -
Operational Planning and Disruption Management in Offshore Logistics
Krey, Stian; Albjerk, Nils Blegeberg; Danielsen, Teodor Kristoffer (Master thesis, 2015)This thesis considers operational planning and disruption management in the offshore supply service in Statoil, the biggest Norwegian oil and gas company. A significant amount of time is needed for operational planning, ... -
Operational planning for routes and schedules for a fleet of fuel supply vessels
Christiansen, Marielle; Fagerholt, Kjetil; Rachaniotis, Nikos; Stålhane, Magnus (Journal article; Peer reviewed, 2017)This paper considers a real operational problem of routing and scheduling a fleet of fuel supply vessels used to service customer ships anchored outside a major port. The problem can be formulated as a rich multi-trip ... -
Operational sea passage scenario generation for virtual testing of ships using an optimization for simulation approach
Sandvik, Endre; Nielsen, Jørgen Bremnes; Asbjørnslett, Bjørn Egil; Pedersen, Eilif; Fagerholt, Kjetil (Peer reviewed; Journal article, 2020)In this paper, a model for implementation of sea passage operational scenarios in the context of simulation-based design of ships is presented. To facilitate the transition towards more energy-efficient shipping, the ability ... -
Optimal Charging and Repositioning of Electric Vehicles in a Free-Floating Carsharing System
Folkestad, Carl Axel Aadne; Hansen, Nora Åsheim; Fagerholt, Kjetil; Andersson, Henrik; Pantuso, Giovanni (Journal article; Peer reviewed, 2019)Carsharing has received increased attention from the Operations Research community in recent years. Currently, many systems are adopting electric vehicles that require charging when battery levels fall below a given level. ... -
Optimal Handling and Repositioning of Modern Carsharing Systems - A Hybrid Genetic Search with Adaptive Diversity Control Approach
Folkestad, Carl Axel Aadne; Hansen, Nora Åsheim (Master thesis, 2017)Carsharing systems have emerged as an attractive form of transport in urban areas since the beginning of the 21st century. Effective carsharing systems carry significant environmental advantages as well as economic advantages ... -
Optimal Investment and Operation Strategy for Oil Spill Preparedness: With Case Study on the Northern Norwegian Continental Shelf
Walslag, Hilde Løset; Høyland, Tonje (Master thesis, 2013)The development of petroleum activities in the northern area has brought an increased focus on developing offshore oil spill preparedness. Remoteness and harshclimate dominating large parts of the region pose new challenges ... -
Optimal maritime fleet composition under future greenhouse gas emissions restrictions and uncertain fuel prices
Loennechen, Olav (Master thesis, 2023)Shippingindustrien er en stor bidragsyter til globale klimagassutslipp. En viktig faktor for industrien sine store utslipp er dens avhengighet av tung fyringsolje med høyt karboninnhold. For å redusere utslippene, bør ... -
Optimal planning of an urban ferry service operated with zero emission technology
Rødseth, Kenneth Løvold; Fagerholt, Kjetil; Proost, Stef (Peer reviewed; Journal article, 2023)While passenger-only ferries can be an effective instrument in mitigating road congestion in urban areas, they are among the most polluting modes of transportation. This paper studies technical and economic feasibilities ... -
Optimal Repositioning in Bike Sharing Systems
Kristianslund, Johannes; Espegren, Hans Martin (Master thesis, 2016)This thesis examines the static bicycle repositioning problem (SBRP) and the dynamic bicycle repositioning problem (DBRP) which deal with optimal re-balancing of bike sharing systems (BSSs) during the night and during the ... -
Optimal ship lifetime fuel and power system selection
Lagemann, Benjamin; Lindstad, Elizabeth; Fagerholt, Kjetil; Rialland, Agathe Isabelle; Erikstad, Stein Ove (Journal article; Peer reviewed, 2021) -
Optimal ship speed and routing when considering ECA regulations
Gausel, Nora Therese (Master thesis, 2014)Abstract Annex VI of the MARPOL convention under the International Maritime Organization considers air pollution from ships and defines four Emission Control Areas (ECAs) with more stringent control of sulphur emissions. ...