TOTAL BATTERY POWERED SUBMARINE DESIGN, A NEW WAY OF THINKING Sven - - PowerPoint PPT Presentation

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TOTAL BATTERY POWERED SUBMARINE DESIGN, A NEW WAY OF THINKING

Sven Los

Nevesbu Naval Architects & Marine Engineers

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NEVESBU

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Name: Sven Los Background: MSc Marine T echnology at TU Delft Function: Naval architect

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Introduction Potential benefits of total battery powered submarines Identified design challenges Feasibility study Market potentials Conclusion

CONTENT

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Past decades; enormous developments in battery technology Research into battery technology still ongoing New battery technology has a high potential for the undersea defense industry

INTRODUCTION

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Improved battery technology led to a revolution in the civil electric vehicle industry and is upcoming in civil shipping industry Use of total battery powered vessels in the undersea defense industry limited to UUVs and small manned vehicles Improved battery technology is expected to make total battery powered submarines feasible

INTRODUCTION

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INTRODUCTION

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Diesel electric: T

• tal battery powered:

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Air independent propulsion system Reduction in signature

Thermal Acoustic Visual Radar cross section

Safety characteristics

Lithium battery vs lead acid batteries Less hot machine parts (no combustion engines), which will reduce the risks of fire Less pressure hull penetrations

POTENTIAL BENEFITS OF TOTAL BATTERY POWERED SUBMARINES

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T actical advantages

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Decrease in amount of systems

Decrease of design complexity Reduction in maintenance Reduced workload for submarine crew Improvement in availability and reliability

Simplification of systems Potential for crew size reduction and automatization

Simplification of control propulsion plant Simplification of control underwater systems Reduction in required corrective and preventive maintenance

POTENTIAL BENEFITS OF TOTAL BATTERY POWERED SUBMARINES

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Diesel engines Generators Lubrication oil system diesel engines Fresh water cooling system diesel engines Seawater cooling system diesel engines Diesel engine start – stop system Air intake system Exhaust gas system Fuel oil injection system Fuel oil service and conditioning system Fuel oil transfer and compensation system

Ov Overvie erview ach chie ieva vable s ble sys ystem tem redu reductio tion n due t due to o

• omi

miss ssion ion of

• f DG-sets

sets

Reduction of complexity

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Density lithium batteries Impact on platform design philosophies Safety aspects of battery integration Air quality control for prolonged submerged periods The loss of selfcharging capacity will make powerconsumption management a critical success factor

IDENTIFIED DESIGN CHALLENGES

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Research goal;

Determining the feasibility of an entirely battery powered submarine design based on available technology Determining the limiting design factors

Approach;

Re-designing an existing diesel-electric submarine design into a total battery powered submarine design The MORAY 1800 used as reference design Design volume and all design requirements (except required endurance and range) are kept constant The created total battery powered design is compared with reference design to determine the feasibility

FEASIBILITY STUDY

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Research goal and approach

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FEASIBILITY STUDY

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Created concept design

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FEASIBILITY STUDY

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Created concept design – main characteristics

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Dim Dimen ensi sions

• ns

Length 66.5 m Hull diameter 6.5 m Dis Displ place acemen ment Surfaced 1700 ton Submerged 1900 ton Div Divin ing d g dep epth th

• Max. operational

300 m Co Comb mbat at Launching tubes 6 weapons 20 Spe Speed Max for one hour 20 kn Burst 21.5 kn Acc Accom

• mmo

modati dations

• ns

Crew & trainees 34+4

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Applied battery technology

NMC chemistry lithium batteries Specific energy modules: 200 Wh/kg Energy density modules: 314 Wh/l

Applied battery topology

Four battery blocks T

• tal amount of battery strings: 1476

T

• tal installed battery capacity: 88.5 MWh

FEASIBILITY STUDY

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Battery design

UDT Glasgow 27-06-2019 Ch Chara racte cteri ristic stics o s of f used used ba battery ery ce cell ll indic indicated in ted in red red

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Submerged range and endurance comparison between concept and reference design

FEASIBILITY STUDY

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Operational capability study

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Sub Submer merge ged d range range vs vs sp spee eed d Sub Submer merge ged d en endurance vs spe durance vs speed ed

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T

• tal range and endurance comparison between concept and reference design

FEASIBILITY STUDY

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Operational capability study

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T

• t
• tal

al range range vs vs sp spee eed d T

• t
• tal

al en endurance vs spe durance vs speed ed

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Local to medium range mission feasible for total battery powered design Example of two week mission given below:

FEASIBILITY STUDY

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Mission capabilities

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T

• tal battery powered design; most

suitable for coastal defense missions Low design complexity, which leads to a less complex production and maintenance Improvement in availability and reliability Expected reduction in investment and lifecycle costs Battery technology is still improving; potential of total battery powered design will increase

MARKET POTENTIALS

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T

• tal battery powered submarines can been seen as new players in the

market of naval submarines

High potential for small displacement submarines used for coastal defense missions They will have advantage from a design, maintenance, costs and operational perspective

The option of a total battery powered submarine should be kept in mind when the design/purchase process of new submarines is started

CONCLUSION

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Conclusion

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CONTACT

Neve Nevesbu sbu b.v b.v.

Kelvinring 48 2952 BG Alblasserdam The Netherlands +31 88 943 3400 sales@nevesbu.com www.nevesbu.com

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