Zero emission commuter ferry Kul , Ship Project A Tomas Their (224051), Ran Xiao (467643)

 Original concept  Resistance calculations  General arrangement  Structural calculations  Weight estimation  Stability  Cost estimation  Conclusions Main content Kul , Ship Project A2

 “Zero emission commuter ferry to be used in Helsinki”  City centre - Kruunuvuorenranta Kul , Ship Project A3 Original concept

 Original specifications  150 passengers (+ 20 bicycles, wheel chair capacity etc.)  Wooden catamaran  Hydrogen fuel cells  Service speed 15 knots  24 m long, 9 m wide, 1.15 m draught Kul , Ship Project A4 Original concept

 Poorly done during concept phase  Catamaran calculations  Problematic  Reliability of results  Cavitation  RPM limitation: 390 r/min  Final results:  Lower service speed to 13 knots  2 x 320 kW engines Kul , Ship Project A5 Resistance calculations

 Small ship  Emphasis on more details  Passenger area done  Machinery placement  Other gear Kul , Ship Project A6 General arrangement

Kul , Ship Project A7

 Wooden structure  Own regulations  Small ship  Relatively easy calculations  Results:  The current design has all the strength it needs Kul , Ship Project A8 Structural calculations

 Unconventional design  Direct approach simple  Weight of wood and other materials  Weight of main components  Passengers and cargo  Final weight: 57,2 tons  Comparing the results to other ships is useless  The draught is similar to that of other ships of the same size Kul , Ship Project A9 Weight estimation

 Vertical center of gravity  High and heavy roof vs. machinery in the hulls  Catamaran design helps with stability  Final results: The recovering moment is much more than the needed one. Fully satisfied the requirement of DNV’s regulation for the ferry Kul , Ship Project A10 Stability

 As with weight, a direct approach is best  Price of materials, main components, other  Final cost: 1,88 million €  Comparisons with ships in the same class  Simple ships: ~ 1,5 million €  Complicated ships: ~ 3,5 million €  Ar Vag Tredan gives interesting comparison Kul , Ship Project A11 Cost estimations

 Changes from concept:  Higher weight  Slower speed  Higher power  Cost same  Main design points same  The ship seems feasible  More work is needed to make final decision  (Proper CAD model would have been nice) Kul , Ship Project A12 Conclusions

Thank you! Questions? Kul , Ship Project A13