SHIP SPEED MODELS & OPTIMIZATION (2009-2023)

Optimizing ship speed turned out to be an important part of my recent work, and has been an important side-kick of my research in maritime emissions. It started at NTUA and continued at DTU. I consider it important enough to put it in a separate section. Some of the papers in the emissions section can also be considered to fall into the speed category, and vice versa.

There has been no “speed project” per se, all research being conducted in the context of various emissions projects (see ΗERE).

NTUA: papers No. 1 to 3. 

Paper No. 2 (with Kostas Gkonis) is characterized as an “archival” paper by SNAME, and paper No. 3 (with Christos Kontovas) is characterized as a “highly cited” paper by Clarivate and the top cited paper in ship energy efficiency & decarbonization according to a 2022 bibliometric survey paper.

DTU: papers No. 4 to 16. 

Paper No. 12 was an outgrowth of an (unfunded) MSc. thesis by Massimo Giovannini (2016). 

Paper No. 13 received the Best Conference Paper award at the 2019 IAME conference (Athens), sponsored by the journal Maritime Economics and Logistics and Palgrave-MacMillan.

Paper No. 16 (with Sotiria Lagouvardou) debunks some claims that fuel consumption behaves in a fashion that contradicts the laws of physics.

 

1.   Psaraftis, H.N., Kontovas, C.A., Kakalis, N., 2009, Cost-  effectiveness of Speed Reduction as an Emissions Reduction Measure for Fast Ships, Proceedings of the 10th International Conference on Fast Sea Transportation (FAST 2009), October 5-8, Athens, Greece.

2.  Gkonis, K.G., H. N. Psaraftis, 2012, Modelling tankers’ optimal speed and emissions, Archival Paper, 2012 SNAME Transactions, Vol. 120, 90-115,  2012 (Annual Meeting of the Society of Naval Architects and Marine Engineers, Providence, RI, USA, October.

3.  Psaraftis, H.N., and C.A. Kontovas, 2013, Speed Models for Energy-Efficient Maritime Transportation: A Taxonomy and Survey, Transportation Research Part C: Emerging Technologies  26, 331–351.

4. Psaraftis, H.N., and C.A. Kontovas, 2014, Ship speed optimization: Concepts, models and combined speed-routing scenarios, Transportation Research Part C, 44, 52-69.

5. Fagerholt, K., Gausel, N., Rakke, J., Psaraftis, H., 2015, Maritime routing and speed optimization with emission control areas, Transportation Research Part C, 52, 57-63.

6. Magirou, E.F., H.N. Psaraftis, T. Bouritas, 2015,  The economic speed of an oceangoing vessel in a dynamic setting, Transportation Research Part B, 76, 48-67.

7. Psaraftis, H.N., C.A. Kontovas, 2015, Speed Optimization for Green Maritime Logistics: Status and Prospects, ECONSHIP 2015 conference, Chios, Greece, May.
8. Psaraftis, H. N., C.A. Kontovas 2015, Slow steaming in maritime transportation: fundamentals, trade-offs, and decision models, chapter in Handbook of Ocean Container Transportation Logistics: Making Global Supply Chains Effective, C.-Y. Lee and Q. Meng (eds.) Springer. 
9. Fagerholt, K., H.N. Psaraftis, 2015, On two speed optimization problems for ships that sail in and out of emission control areas, Transportation Research Part D , 39, 56-64, 2015.
10. Psaraftis, H. N., C.A. Kontovas, 2016, Green maritime transportation: Speed and route optimization, chapter in Green Transportation Logistics: in Search for Win-Win Solutions, H.N. Psaraftis (ed.) Springer. 
11. Wen, M., Pacino, D., Kontovas, C., Psaraftis, H. N.,  2017, A multiple ship routing and speed optimization problem under time, cost and environmental objectives, Transportation Research Part-D, 52, 303-321. 
12. Giovannini, M., Psaraftis, H.N., 2019, The profit maximizing liner shipping problem with flexible frequencies: logistical and environmental considerations, Flexible Services and Manufacturing Journal, 31:567–597 doi.org/10.1007/s10696-018-9308-z.

13. Psaraftis, H.N., 2019, Speed Optimization vs Speed Reduction: the speed limit debate, IAME 2019 conference, Athens, Greece, June 2019.
14. Psaraftis, H.N., 2019, Speed Optimization vs Speed Reduction: the Choice between Speed Limits and a Bunker Levy, Sustainability, 11, 2249; doi:10.3390/su11080000

15. Psaraftis, H.N., 2019, Speed Optimization vs Speed Reduction: are speed limits better than a bunker levy? Maritime Economics and Logistics 21, 524–542, doi.org/10.1057/s41278-019-00132-8
16. Psaraftis, H. N., S. Lagouvardou, 2023, Ship speed vs power or fuel consumption: Are laws of physics still valid? Regression analysis pitfalls and misguided policy implications, Cleaner Logistics and Supply Chain, https://doi.org/10.1016/j.clscn.2023.100111