» Wind Propulsion for Cargo Ships «Performance Parameters and Operational Aspects
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1 Prof. Capt. Michael Vahs Maritime Department / HS Emden-Leer Germany» Wind Propulsion for Cargo Ships «Performance Parameters and Operational Aspects Natural Propulsion Wageningen,
2 Maritime Department Leer Founded in 1854 as School of Navigation Incorporated in HS-Emden/Leer (University of applied Sciences) Maritime region (shipping, shipbuilding) About 350 students: Nautical Studies, Ship Management Special competence in ship operation research
3 Maritime Department Leer HS Emden-Leer was/is cooperating in ambitious sail related projects: SkySails-Technology ( ) First full scale ship trials E-Ship of Enercon ( ) First innovative Wind Hybrid Ship Wind Hybrid Coaster ( ) Innovations in sail technology, e.g. light weight materials
4 Overview Introduction and Motivation FAQ and answers Performance Parameters Operational Parameters Recent Projects Conclusions
5 Introduction and Motivation Fossil fuels are increasingly expensive Depletion of reserves; growing demand (abt. 1.3 % yearly); Combination of above causes is accelerating the rise in prices;
6 Introduction and Motivation Political pressure Shipping is a significant air polluter CO2 (abt. 3%) SOx (abt. 7%) NOx (abt. 12%) Particulates This causes damage especially in the future difficult calculations actually not paid for (yet)
7 Introduction and Motivation Summary Chances for Wind Propulsion = f (energy prices, political pressure)
8 FAQ How much can you save with Sail Propulsion? or How long is the Pay back Time on the investment?
9 FAQ + Answers How much can you save with Sail Propulsion? You can save up to. (0 100%) (Salesman s answer)
10 FAQ + Answers You can save up to. (0 100%)!? Researcher s view: This is not necessarily wrong but imprecise! A more precise answer: You can save approx. (%, ) of (reference) under the following conditions and assumptions:
11 FAQ + Answers Summary: A precise prognosis of wind power for ships is complex, far more complex than for engine powered ships. Result: Wind Propulsion as auxiliary propulsion for the near future. Reliability of service Innovation needs time to settle Scientific Task: Find out and quantify all relevant parameters and influences regarding wind propulsion. (Wind Propulsion Model)
12 Performance Parameters Basis: Aerodynamic Forces at foils and sails (also other fluids) F = 1 ρ v 2 c A 2
13 Performance Parameters Sail Coefficients F Lift = 1 ρ v 2 2 c L A Sail F Drag = 1 ρ v 2 2 c D A Sail F Sail ( long ) = 1 ρ v 2 2 c x A Sail F Sail( trans) = 1 ρ v 2 2 c y A Sail Source: T. Fujiwara
14 Performance Parameters Lift Coefficient F Lift = 1 ρ v 2 2 c L A Sail
15 Performance Parameters Propulsion: Lift Drag Lift/Drag-Ratio Overall Objective: High Thrust in sail direction Source: T. Fujiwara
16 Operational Parameters Wind speed/direction F Sail( long ) = 1 ρ v 2 2 c x A Sail Polar Diagramm
17 Operational Parameters Wind speed/direction F Sail( long ) = 1 ρ v 2 2 c x A Sail Interdependencies: Wind conditions in trading area ( online fuel ) Route vs. wind direction
18 Operational Parameters Logistics New energy efficient liner services following wind patterns F Sail( long ) = 1 ρ v 2 2 c x A Sail
19 Operational Parameters Weather Routing High relevance for savings by wind energy F Sail( long ) = 1 ρ v 2 2 c x A Sail Algorithms Least time Least fuel Least cost
20 Operational Parameters Side Effects Added resistance by wind drift Added resistance by yawing moments Increased propeller efficiency by reducing propeller load
21 Operational Parameters Side Effects Added resistance by wind drift can be minimized by design Shape/Contours Main particulars (L,B,T) Fins, Deadwood, Rudder Source: MOL
22 Operational Parameters Side Effects Added resistance by yawing moments (counter rudder) can be minimized by design Longitudinal position of sail forces (center) Rudder design Area Drag Counter Rudder
23 Operational Parameters Side Effects Improved propeller efficiency by reducing propeller load Source: Naaijen, Koster
24 Operational Parameters Compatibility Ship Operation Sail System Bridge visibility (SOLAS req.) Navigation equipment (nav lights, radar) Space requirements Cargo operations Air draft, bridge passage Crew s workload / automation Maintenance requirements Crew skills / training Safety: ship stability, traffic, crew
25 Concepts Concept SkySails System available Concept E-Ship (Enercon) E-Ship 1 in regular service, data collection and evaluation phase
26 Concept SkySails Research Project funded by the German Government (BMBF): Programme: Climate Protection Title: Wind Power Propulsion for Cargo Ships (Low Emission Ship) Partners: HS Emden-Leer SkySails
27 Concept SkySails System Advantages: Re-fit with small space requirements for all ship types available (80, 160, 320 m²) Stowing Position: No disturbing superstructures (cargo operations, bridge crossing) Automatic Operation Challenging task
28 Concept SkySails System Advantages: Efficiency Lift coefficient comparatively small But increased lift through dynamic flight mode (down wind to beam wind)
29 Concept SkySails System Advantages: Efficiency utilizing stronger and more stable winds in higher altitudes
30 Concept SkySails System Advantages: Safety Less load on ship s stability due to small heeling lever
31 Concept SkySails Experimental Platform: Research vessel» Beaufort «September 2006: First Sea Trials of the operational system in the Baltic
32 Concept SkySails Open questions: Long time overall performance - operational time? System s robustness (kite material) Kite launch and recovery (automation? loss of time?) System handling skilled and motivated crew (incentives?) Flight regulations (international waters only?) Safety items? (not sufficient operational experience yet) Outlook Market acceptance? Technical progress? (rigid ultra-light kite foils?)
33 Concept E-Ship R&D Project E-Ship performed by Enercon, Aurich/Germany one of the world s leading wind turbine manufacturers Motto: Energy for the World supported by HS Emden/Leer
34 Concept E-Ship Objectives: Hybrid Propulsion Innovative product huge market Optimized cargo carrier for the transport of wind turbine plants (own cargo) Reduction of transportation costs Environmental protection
35 Concept E-Ship Sailing Technology: 4 Magnus Rotors (25 m x 4,30 m) Functional principle: Magnus Effect F Lift
36 Concept E-Ship Historical Background: The german engineer Anton Flettner developed an innovative wind propulsion system in the 1920 s Flettner Rotors Flettner had no economical success The age of Dieselization had just started!
37 Concept E-Ship System Advantages: High lift about 10x higher than conventional square sails Right: Lift Coefficient of Sail Systems in comparison
38 Concept E-Ship System Advantages: Small Sail Area (space requirements)
39 Concept E-Ship System Advantages: Less load on ship s stability: smaller heeling lever nearly constant heeling moments in squally winds (right + below) no (nearly) impact on stability after shut down
40 Concept E-Ship System Advantages: Fully automated operation no sail handling automatic switch on/off integrated power management and propulsion control (Diesel-electric) automatic RPM-control routing for optimal efficiency (under construction)
41 Concept E-Ship First Sea Trials North Sea 2010
42 Concept E-Ship Economic Potentials: A ship of this size (130 m) and speed consumes about 30 tons fuel oil per day i.e. about 6 Mio USD p.a. (IFO 380) i.e. about 8.7 Mio USD p.a. (SECA) You can save up to.
43 Concept E-Ship Environmental Protection: less CO2 90% less NOx (SCR-technology) 97% less SOx (Diesel-electric main propulsion with low sulphur fuel oil) No sludge Clean ballast Foul release coating under water (no poison) Garbage segregation and recycling/disposal ashore only Organic food for crew Sailing incentives
44 Concept E-Ship Outlook: First results after test and evaluation phase Continuous optimization will increase savings, e.g. system settings, routing, cargo logistics
45 Conclusions All technical requirements can be handled; Technological developments in start up phase; A skilled and motivated crew will be more successful; Volatile markets with rising energy prices to be expected; Climate change will increase political pressure; Good Seamanship means to be prepared for all possible scenarios!
46 Conclusions Our task: to be prepared (poltical) and to take chances (economical)!
47 Outlook (for universities and institutes) Innovation begins in the minds Innovation requires innovative people open minded motivated special competences: Sail Technology Energy Management Routing Thank you!
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