FUEL EFFICIENCY IN MODERN RESEARCH ICEBREAKER DESIGN. Martin Melzer

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1 FUEL EFFICIENCY IN MODERN RESEARCH ICEBREAKER DESIGN Martin Melzer

2 Agenda Motivation and Introduction Fuel Efficiency in modern Cargo Ship Design About Research Icebreakers Striving for Fuel Efficiency in Research Icebreaker Design 2

3 Motivation Starting Situation Fuel Efficiency Heavy Lightship Electric Propulsion No Bulbeous Bow Hullform resembling a brick CPP CPP designed for low URN CPP with very high Ice classes Comparable Small Propeller Diameter because of Ice Floes No PID possible Speed loss occurs early 3

4 Short Introduction TLS Feasibility Studies Concept Development Energy Management and Optimization Tender Documents/ Bid Evaluation Basic Design with Classification Detail Design 15TH CONFERENCE ON SHIP EFFICIENCY Project Management Plan Approvals Construction Supervision Building advice to Yards Retrofits and Conversions Warranty Services 4

5 Fuel Efficiency in modern Cargo Ship Design Engine selection Stroke, Revolutions Propeller Efficiency and PIDs Electric Power Generation & Distribution Waste Heat Recovery Hullform Parametric Optimisation, Wake Field Studies Dual Fuel 5

6 Tayloring of design Utilise Data from Fleet Specific Route Specific Leg Speed, Weather Draught Trim Effective Power [kw] Ship Speed [knots] T=12m PE(A) T=12m PE(B) T=14m PE(A) T=14m PE(B) 6

7 About Research Icebreakers 7

8 About Research Icebreakers 1 Ship in a Fleet 2 Primary Roles Logistics Science 8

9 Science at sea Acoustic Survey Towing Stationkeeping 9

10 Supplying Antarctic Stations 2 Primary Roles Logistics Science Non Bulk Bulk in casks Container Vehicles Personnel 10

11 STRIVING FOR FUEL EFFICIENCY IN RESEARCH ICEBREAKER DESIGN 11

12 Operational Profile of Research Icebreakers Power [kw] Accoustic survey Harbour Time [%] Specific Power Consumption [%] 2000 Speed [knots] DP Ice breaking light conditions Towing Transit at 13 knots Cargo transfer In refit other Proportion of Time [%] Specific Work [%] Delivered Propulsion Power per operating condition [kw] Critical Values 12

13 To Do List: Efficiency Right Sizing of Power Plant Balancing Icebreaking Performance with Open Water and Seakeeping Optimizing Internal Arrangements for Reduced Voluntary Speed Loss Improve Cargo Handling where possible (Time at Shelf) Trim and Deadweight Distribution Make Decisions! Accept the Rest! You need CPP, Electric Propulsion etc. Voyage Scenario Understand Ice Breaking Optimize Open Water Optimize Propeller Preliminary/ Empirical Experience SEAKEEPING Check Station Keeping Observe 13

14 Seakeeping 135 (bow quart.) (head sea) (bow quart.) (bow quart.) (head sea) 0,05 0,04 0,03 0,02 0, (bow quart.) Strip Method Identifying severe risks Empirical Corrections Several Loops 90 (beam sea) (beam (beam sea) sea) 0,00 90 (beam sea) (stern quart.) 45 (stern quart.) 45 (stern quart.) 45 (stern quart.) (follow sea) (follow sea) Mass of POI to check Often Owners request standard Criteria e.g. Nordforsk or STANAG Hard to achieve for an Icebreaker 14

15 Open water optimisation Section Area Section Areas CFD Approaching Resistance Identifying severe risks Empirical Corrections Several Loops 15

16 Icebreaking Resistance,, Formula for semi empirical resistance in ice acc. to Lindquist Definitions taken from lecture notes NTNU, Riska 16

17 Conclusuion Timeline forbids to involve too many parties in the development Important Design Parameters (Deadweight, Geometrics) are far from beeing fixed Up-front investments are often not accepted Customers expect high level of accuracy for their individual operational profiles Convincing Ships are taylored rules out development of parent design Convincing Ships are balanced It is not the Mastery of one discipline that leads to success 17

18 THANK YOU FOR YOUR ATTENTION 15TH CONFERENCE ON SHIP EFFICIENCY 18