Marine Atlantic and NRC Partnership in Strategic …...Strategy – Optimizing overall efficiency (Example 6 of NRC Technology) •Description: Optimizing ship overall efficiency include

Marine Atlantic and NRC Partnership in

Strategic Research to Improve Ship

Efficiency

Ocean, Coastal and River Engineering (OCRE)

Keith Castonguay (Marine Atlantic)

Lawrence Mak (NRC)

May, 2015


Marine Atlantic Goal

• Environmental Leadership

• Competitive Advantage


Historic Marine Fuel Price


Forecasted Marine Fuel Price


NRC Marine Vehicles Program and Investment


NRC Competency


The Need for A Holistic Approach


An Example: NRC Strategic Research with MAI


NRC Multi-Phase Holistic Approach

• Focus – Promote awareness - Minimize energy waste

– Minimize energy usage - Implement energy efficient operation

• Performance Monitoring – Data monitoring and analysis - Establish baseline

– Define data products, KPI - Operational requirements

– High Value Goals - Human factor

• Performance Management – Introduce technology - Automate KPI computation

– Cloud storage - Interactive feedback and predictive tools

• Operational Optimization – Fleet implementation - Fleet benchmarking

– Continuous improvement - Interactive feedback and predictive tools


Fuel Efficient Operation – Speed Optimization

(Example 1 of NRC Technology)

• Description: Speed and propeller pitch are optimized to save fuel.

• Method: Performance model of fuel, payload, speed, distance, weather condition No ship modification. Need only GPS.

• Payback: Fast.


Fuel Efficient Operation – Speed Optimization



Fuel Efficient Operation – Pressure Ice and Ship

Performance Models (Example 2 of NRC Technology)

• Description: Addresses ship route optimization in planning navigation and operation in ice infested waters

• Method: NRC ice model can predict ice concentration, thickness, pressure and ridge thickness. NRC discrete element model can simulate ship maneuvering in ice and other complicated tactical operations in ice infested water.

• Payback: Moderately fast. The technology is less mature. Need validation.


Optimized Ship Handling – Optimized Trim


• Description: Optimizing fore/aft trim can have a significant effect on fuel consumption for a given draft and speed.

• Method: NRC uses StarCCM+ RANSE CFD software to identify the optimal static trim for a given speed and displacement.

• Payback: Fast.


Optimized Ship Handling – Optimized Trim



Optimized Ship Handling – Autopilot tuning


• Description: Poorly designed or tuned autopilot system can increase fuel consumption due to added resistance and distance travelled off track.

• Method: Measure rudder angle, GPS position to compare the actual track achieved and the ideal track through all the waypoints and. Determine the latency and accuracy of the rudder by comparing the command signal with the actual rudder motion to assess lag and deviation. Assess the frequency and extent of rudder corrections.

• Payback: Fast.


Optimized Ship Handling – Autopilot tuning


• Course-Keeping and Track/Way-Point Following

• Rudder-Roll Stabilization

• Preserve vessel dynamics

• Optimal state estimation

• Filtering of wave frequency

• Gain Scheduling

• Sliding Gain Control and Heading Reference

State Estimator

Kp

Ky

+

Actual Vessel

Or

Simulation

uy

Yaw

Estimate

HF Roll

Estimate

+

Yaw

Reference

Controller

+

_

+

+

0 500 1000 1500 2000 2500 3000 3500 4000

-500

0

500

1000

1500

2000

2500

Trajectory of Ship Centre

X coord. (m)

Y c

oord

. (m

)

Optimal Tuning

Way-Point

Poor Tuning

0 200 400 600 800 1000 1200 1400-40

-30

-20

-10

0

10

20

30

40

50

60

Time (s)

Rudder

Angle

(deg)

Rudder Motion (Optimal)

Rudder Motion (Poor)


Maintenance – Advisory model for hull cleaning and

propeller polishing (Example 5 of NRC Technology)

• Description: Hull maintenance includes cleaning, repair and painting of the hull to reduce roughness; and propeller cleaning and polishing.

• Method: Monitor and build a database of resistance and power versus time before and after dry dock to develop an advisory model for hull cleaning and propeller polishing. Need to install optical thrust-torque meter and GPS data.

• Payback: Fast


Strategy – Optimizing overall efficiency


• Description: Optimizing ship overall efficiency include engine, transmission, hull, bow and propeller efficiencies.

• Method: NRC models for efficient propeller design, reduce cavitation, optimize rotational speed and pitch to minimize fuel consumption, and hull modeling to minimize resistance.

• Payback: Moderately fast


Strategy – Dynamic Model of Ship Behaviour


• Description: Assess efficiency by compare the actual and ideal route, configuration and fuel consumption of a ship. Optimize bow, hull and propulsion system

• Method: NRC has a maneuvering model, which simulates the motion of a ship (surge, sway, yaw) using standard maneuvering equations. NRC uses StarCCM+ CFD software to simulate the calm water resistance, thrust, torque, sinkage and trim, and conceptualized a method to simulate added resistance due to waves. The two models complement each other to provide near real-time simulation of the dynamic behavior of the ship in waves, wind and current and estimates resistance, delivered power etc.

• Payback: Moderately Fast.


Strategy – Dynamic Model of Ship Behaviour



Questions?

Keith Castonguay

[email protected]

Lawrence Mak [email protected]

mailto:[email protected]






Marine Atlantic and NRC Partnership in Strategic …...Strategy – Optimizing overall efficiency (Example 6 of NRC Technology) •Description: Optimizing ship overall efficiency include

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