Prof. Mustafa Insel HİDROTEKNİK Nautical Design Development A Decision Support System for Energy Efficient Propulsion MARENER 2017 - WMU
Content Background Numerical studies Validation- Sea Trials Development Conclusions 2
Global Warming Effects 3
Global Warming Effects, Istanbul 2/6/2014 4
Shipping Effect on Climate change 3.2 TON 1 TON 5
Decision Support Systems for ship operation and configuration Selection of operational ship loading parameters : trim, draught Selection of operational voyage parameters : route, speed Selection of ship performance parameters : speed, rpm, propeller pitch Current approach is aimed to extend the decision support into retrofit options : propeller change, propulsion improvement devices 6
Decision Support Systems data generation Noon reports Irresponsive to change of conditions (speed, environmental conditions etc) Can not reflect conditions not encountered in the data Sea Trials Limited data for real operating conditions Monitoring, learning through experience Lack of real reasons based on final data First principles Requires extensive calculations for different conditions 7
Methodology 8
Methodology Geometric modeling of the form CFD studies of performance Full scale trials for verification Decision support system parameters Installation Operation 9
Information flow 10
Case Study UN RoRo Two routes 12 vessel sister ships Scheduled trips Ship Characteristics Length 193 m Breadth 26 m Draught 6.45 m DW: 9371 ton 240 trailers 11
CFD for the resistance in different speed 12
Speed is the prime factor in the evaluation of resistance 19 knots 21 knots 13
Sea Trials for the Validation and Correlation During regular voyage Istanbul-Toulon-Istanbul various data is collected for the validation Speed-power, propulsion efficiency Propeller operating conditions, i.e. Rpm, pitch Effect of wind Effect of waves Trim conditions Power increase with rudder/autopilot 14
Measurement system Wind speed Wind direction Depth Draught Trim A/D converter A/D converter Propeller pitch Generator load Engine fuel rack Turbo charger speed Rudder angles GPS Bridge Digital Compass AHRS 3D Gyro 3D acc 2 shafts Shaft torque, rpm Engine room 15
Shaft torque measurements 16
Istanbul-Toulon (Port Engine) 17
Istanbul-Toulon (Starboard Engine) 18
Toulon-Istanbul (Port Engine) 19
Toulon-Istanbul (Starboard Engine) 20
Ship Total Shaft Power (kw) Toulon-Istanbul Speed Trials 14000 12000 10000 8000 6000 4000 2000 0 0 5 10 15 20 25 Ship Speed (knots) 21
Power requirement at sea 19000 Towing Tank Ballast Prediction Towing Tank Full Load Prediction Sea trial 2006 17000 15000 13000 11000 9000 7000 5000 18 18.5 19 19.5 20 20.5 21 21.5 22 22.5 23 22
Power requirement at sea 21000 Towing Tank Full Load Prediction Sea Trial 2016 Towing Tank Full Load Prediction corrected by Sea trial 2006 CFD 19000 17000 15000 13000 11000 9000 7000 5000 18 18.5 19 19.5 20 20.5 21 21.5 22 22.5 23 23
Ship shaft power (kw) Real Conditions 12000 Shaft power in voyage Shaft power in calm water Shaft power in voyage corrected for the wind effects 11000 10000 9000 8000 7000 6000 18 18.5 19 19.5 20 20.5 21 Ship speed (knots) 24
Test of an advanced propeller 21000 Sea Trial 2016 Towing Tank Full Load Prediction corrected by Sea trial 2006 CFD Advanced Propeller 19000 17000 15000 13000 11000 9000 7000 5000 18 18.5 19 19.5 20 20.5 21 21.5 22 22.5 23 25
Power (kw) Reduced rpm for slow steaming containership Original Reduced rpm 18000 16000 14000 12000 10000 8000 6000 4000 Slow steaming speed 2000 0 8 10 12 14 16 18 20 Ship Speed (knot) Original design speed 26
Shaft power (kw) Effect of Advance Propeller Containership Conventional propeller Advanced propeller 18000 16000 14000 12000 10000 8000 6000 4000 2000 0 8 10 12 14 16 18 20 Ship speed (knot) 27
Conclusions Ship operators has options on operational measures such as trim optimization, weather routing etc Retrofit has also options which can be judged with a decision support system Using the first principles using CFD requires more work specific to ship or ship type in comparison with noon reports, learing monitoring systems However hull configuration or retrofits may be estimated and any environmental conditions 28
Thank you for listening Prof. Mustafa İnsel Dr. Ziya Saydam Dr. Serhan Gökçay minsel@hidro-teknik.net zsaydam@hidro-teknik.net sgokcay@hidro-teknik.net 29