Bulk carrier Design project

BULK CARRIERByAmeer kalifullah NA/11/006Lijo johny NA/11/027Hari hara krishnan NA/11/020

panamax

INTRODUCTION

• A bulk carrier, bulk freighter, or bulker is a merchant ship specially designed to transport unpackaged bulk cargo, such as grains, coal, ore, and cement in its cargo holds. Since the first specialized bulk carrier was built in 1852, economic forces have fuelled the development of these ships, causing them to grow in size and sophistication. Today's bulkers are specially designed to maximize capacity, safety, efficiency, and to be able to withstand the rigours of their work.

• Today, bulkers make up 15% - 17% of the world's merchant fleets and range in size from single-hold mini-bulkers to mammoth ore ships able to carry 400,000 metric tons of deadweight (DWT). A number of specialized designs exist: some can unload their own cargo, some depend on port facilities for unloading, and some even package the cargo as it is loaded. Over half of all bulkers have Greek, Japanese, or Chinese owners and more than a quarter are registered in Panama. Korea is the largest single builder of bulkers, and 82% of these ships were built in Asia.

LITERATURE REVIEWIn this project , we have done the preliminary calculations bulk carrier

typeVessels . First of all we collected parent ship data of 20 ships from “gross

tonnage.com” and “worldship.com” .using this data, we calculated Fn , L/B,

D /T,B/T, and power for that 20 ships. After that , we calculate the main dimensions using graphical method.

From the preliminary ship design document, we used the formulas to do the

Calculations in order to calculate the main dimensions.After doing these calculations , finally we calculate the deadweight

estimations. Using this estimations we calculate the percentage difference in displacement.

Owner’s requirement

Owner’s requirement

DWT 65000 T

SPEED 14.5 KNOTS

RANGE 5800 NM

TRADE ROUTE

• Chennai(INDIA)• Port of Chennai

• Cape town (South Africa)

• Port of Cape Town• Distance = 5700

nm

DATA COLLECTED

DIMENSION FROM GRAPHICAL METHODE

FROM THE GRAPH

LBP 215

L/B 6.711

B/T 2.524

D/T 1.443

Fn 0.15427

MAIN PARTICULAR

• Lpp = 228• B = 32.30• Depth = 17.18• Draft = 12.13• Cb = 0.8429• Cp = 0.8449• Cm = 0.997

SELECTION OF BASIC SHIPBased on Froude number similarityHaving Froude number of 0.15427

CORRAL STAR8811819

65517218

35.0422.5

12.0248.71719209

6.2214611872.915141431

1.871880213.9

7.150160.5144

0.15461549311900

Initial Estimate of StabilityWeight calculations

• Lightship Weight Estimation

• Machinery Weight• Outfit weight

estimation• Weight Balance

Other Calculations

STEM AND STERN PROFILE

•The stem and stern profiles are taken from the general arrangement drawing of the basic ship.

•The stern profile is adjusted according to the min rudder clearence which is required.

Stern profile

Stem profile

Generation of sectional area curveSectional area curve using trapezium method.

• The length of run and entrance are calculated using formulae. The length of parallel middle body is calculated.•Lr= 3.2*sqrt(b*t)/Cb•Le= 0.217 *v^2•The curve is to be approximated such that the area of the curve should be equal to underwater volume and the LCB should match with calculated value.

Generation of Lines plan

The Lbp is divided into equal no. of stations.

The body plan is drawn by matching the sections in the sectional area curve.

From this body plan the waterlines and profile are drawn.

Hull resonance diagram

Holtrop calculationBy an approximate power prediction method by J.Holtrop and G.G.J.Mennen

This method is useful in determining the required effective power at the initial design stage of the ship

Therefore the Initially estimated power required is 11123.783 kw

lwt = 20312.73042

References

Preliminary Ship Design SHIP DESIGN FOR EFFICIENCY AND ECONOMY (SCHNEEKLUTH)Principles of Naval Architeture Vol.1Principles of Naval Architeture Vol.2Principles of Naval Architeture Vol.3IRS Rules-2012www.grosstonnage.comwww.wikipedia.orgInternational Convention Load Lines,1966 including the protocol of 1988MAN B&W S60MC6 Engine manual,7th Edition January 2009

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