FUEL EFFICIENCY IN MODERN RESEARCH ICEBREAKER DESIGN Martin - - PowerPoint PPT Presentation

TECHNOLOG SERVICES 28/09/2015

• Martin Melzer

FUEL EFFICIENCY IN MODERN RESEARCH ICEBREAKER DESIGN

TECHNOLOG SERVICES 28/09/2015

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15TH CONFERENCE ON SHIP EFFICIENCY

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

Agenda

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15TH CONFERENCE ON SHIP EFFICIENCY

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

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15TH CONFERENCE ON SHIP EFFICIENCY

Short Introduction TLS

• Project Management
• Plan Approvals
• Construction Supervision
• Building advice to Yards
• Retrofits and Conversions
• Warranty Services
• Feasibility Studies
• Concept Development
• Energy Management and Optimization
• Tender Documents/ Bid Evaluation
• Basic Design with Classification
• Detail Design

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15TH CONFERENCE ON SHIP EFFICIENCY

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

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15TH CONFERENCE ON SHIP EFFICIENCY

Tayloring of design

5 10 15 20

Effective Power [kW]

Ship Speed [knots]

T=12m PE(A) T=12m PE(B) T=14m PE(A) T=14m PE(B)

Utilise Data from Fleet

• Specific Route
• Specific Leg

– Speed, Weather – Draught – Trim

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15TH CONFERENCE ON SHIP EFFICIENCY

About Research Icebreakers

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15TH CONFERENCE ON SHIP EFFICIENCY

• 1 Ship in a Fleet

About Research Icebreakers

• 2 Primary Roles

– Logistics – Science

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15TH CONFERENCE ON SHIP EFFICIENCY

Science at sea

Acoustic Survey Towing Stationkeeping

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15TH CONFERENCE ON SHIP EFFICIENCY

• 2 Primary Roles

– Logistics – Science

Supplying Antarctic Stations

Non Bulk Bulk in casks Container Vehicles Personnel

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15TH CONFERENCE ON SHIP EFFICIENCY

STRIVING FOR FUEL EFFICIENCY IN RESEARCH ICEBREAKER DESIGN

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15TH CONFERENCE ON SHIP EFFICIENCY

DP Ice breaking light conditions Towing Accoustic survey Transit at 13 knots Harbour Cargo transfer In refit

• ther

5 10 15 20 25 30 35 40 45 2000 4000 6000 8000 10000 12000 2 4 6 8 10 12 14 Time [%] Specific Power Consumption [%] Power [kW] Speed [knots] Proportion of Time [%] Specific Work [%] Delivered Propulsion Power per operating condition [kW] Critical Values

Operational Profile of Research Icebreakers

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15TH CONFERENCE ON SHIP 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

To Do List: Efficiency

• Make Decisions !
• Accept the Rest !

You need CPP, Electric Propulsion etc.

SEAKEEPING Check Open Water Optimize Ice Breaking Optimize Station Keeping Observe Propeller Preliminary/ Empirical Experience Voyage Scenario Understand

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15TH CONFERENCE ON SHIP EFFICIENCY

Seakeeping

0,00 0,01 0,02 0,03 0,04 0,05 180° (head sea) 165° 150° 135° (bow quart.) 120° 105° 90° (beam sea) 75° 60° 45° (stern quart.) 30° 15° 0° (follow sea) 15° 30° 45° (stern quart.) 60° 75° 90° (beam sea) 105° 120° 135° (bow quart.) 150° 165° 10 20 30 40 50 60 70 80 90 100 180° (head sea) 165° 150° 135° (bow quart.) 120° 105° 90° (beam sea) 75° 60° 45° (stern quart.) 30° 15° 0° (follow sea) 15° 30° 45° (stern quart.) 60° 75° 90° (beam sea) 105° 120° 135° (bow quart.) 150° 165°

• Strip Method
• Identifying severe risks
• Empirical Corrections
• Several Loops
• Mass of POI to check
• Often Owners request standard

Criteria e.g. Nordforsk or STANAG Hard to achieve for an Icebreaker

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15TH CONFERENCE ON SHIP EFFICIENCY

• CFD
• Approaching Resistance
• Identifying severe risks
• Empirical Corrections
• Several Loops

Open water optimisation

• 20

20 40 60 80 100 120 140 160 180 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 Section Area

Section Areas

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15TH CONFERENCE ON SHIP EFFICIENCY

Icebreaking Resistance

, ,

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

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15TH CONFERENCE ON SHIP EFFICIENCY

• 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

Conclusuion

• 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

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THANK YOU FOR YOUR ATTENTION