Reference Vessels

PAEE Design evaluation tool

The purpose of the PAEE Design evaluation tool is to enable comparison of new and existing ship designs. A number of designs have been established as reference vessels. The tool provides support to make new designs and to compare variations of a new design or compare a new design to the reference vessels.

Findings and results from the ongoing research at the department of Shipping and Marine Technology at Chalmers is continuously incorporated into the tool. Of particular relevance is the Ship System Energy Model (SSEM) that is being developed by PhD student Fabian Tilling

Reference vessels

Select vessel and condition

Select conditions

Reference Ship	Loading condition


L_OA
L_PP
Beam
Speed_Design
Draft_Design
DWT
Lightweight
Wind area
Propeller type
Propeller size
Propeller speed_Design
Propeller pitch_Design
EngineMain
Number of ME
SMCR_Tot
PB_{Design Speed/Design Draft}
Loading condition
L_WL
B
T
Displacement
WSA

Steady State 1

	Ship 1	Ship 2
Reeference ship
Load case
Speed -Power prediction method
Specific fuel oil consumption [g/kWh]
Shaft generator load
Propeller efficiency eta0
Added resistance %
Speed: v [kn]
Brake Power: PB [kW]
Consumption kg/NM
Nautical miles
Fuel cost US$/ton
Fuel cost
Diff
USD SEK

Steady State 1

Compiled graphs

Reference Ship

Load case
		Fixed	Design	Max	Environment
Ship Speed [kn]					Wind speed [kn]
RT incl added res [kN]	RT at speed				Wind direction
PE incl added res [kW]	PE at speed				Wave height [m]
RPM			130		Wave direction
Propeller pitch P/D			0.83		Water depth [m]
MEP					Added resistance%
eta0			0.65
SFOC			180
ton/NM

Time Domain

Select route:

Name of route
Speed [kn]:	Fuel use:
Engine Load [%]:	Time:	xxxx

Steady State 1

Propeller data

	Ship 1	Alternative		Ship 1	Alternative
Ship Speed, V [knots]			KT
Wake fraction coefficient w			RT [kN]
Thrust deduction coefficient t			PE [kW]
Speed of advance, VA [m/s]			PropThrust, T [kN]
No of blades, Z			PPropThrust [kW]
Propeller diameter, D [m]			KQ	9
Pitch PD			Torque [kNm]
RPM			PD [kW]	999
Expanded Area Ration EAR			eta
J = VA/ D/RPM*60
No of props

KT, KQ, eta vs J plot.

ShipData

Ship ID
Ship Name

Choose Main Particulars

Ship type

LOA [m]
Beam [m]
Design draft, T [m]
Design speed [kn] The required speed of the ship for the mission (also called 'Contract speed')

Cargo capacity [ton]
Range [nm] Examples: 1.Gothenburg - Rotterdam 500 NM. 2.Gothenburg - Miami 4300 NM. 3.Gothenburg - Mumbai 6800 NM (via Suez Canal)

Ship particulars

DWT [ton]
LS [ton]
△ [ton]
LPP [m]
LWL [m]

Deadweight Cargo capacity + estimated weights of fuel, supplies crew etc, based on shiptype and size.

Lightship weight Estimated from ship type and deadweight

Displacement Deadweight + Lightship weight

Length between perpendiculars 95% of Length Overall

Length at waterline Estimated from shiptype and LPP

Hull coefficients

Cb [-]
Cm [-]
Cwp [-]

Block coefficient The ratio between displacement volume and the volume of a box with dimensions LWL*BWL*D. Eq: Displacement / (LWL*BWL*D)

Midship block coefficient The ratio between the immersed midship section area AM, and the product of the beam B and the draft D of the ship. Eq: AM / (BWL*D)

Water plane area coefficient AWL / (LWL*BWL)

Superstructure parameters

AOD [m2]
AXV [m2]
AYV [m2]
CMC [m]
HBR [m]
HC [m]

Calculate resistance

Design speed [kn] The required speed of the ship for the mission (also called 'Contract speed')

Water depth [m] Shallow water effect. The pre determined value is a minimum water depth which gives no shallow water effect.

Environment at route Typical environment at desired route for the ship. The ship will be able to steam at design speed in this environment.

Added Resistance [%] Added resistance due to environmental conditions.

Fouling [%] Added resistance due to fouling. Fouling: Marine plants and growth on the submerged part of the hull gives increase of the resistance.

Tot. Added Resistance [%] Added resistance from environment + fouling.

Stern type
Calculation method

RT [kN]
PE [kW]

Holtrop-Mennen

Go to Propulsion (2)

Speed-Resistance

Choose propulsion concept

Propeller diameter [m] By clicking 'Use max' the maximum propeller diameter will be set, based on design draft and shiptype. Normally this is prefered to get the highest propulsive efficiency. The diameter should normally not exceed 10.0 meters for strength and production reasons.

Propeller arrangement
Propeller type

Wake fraction coefficient, w Reduced water velocity at propeller due to growing boundary layer over ship length. Estimated by Taylor's formula

Thrust deduction coefficient, t Increased hull resistance due to propeller 'sucking' water at aft. Estimated by SSPA's formula.

Hull efficiency, etaH etaH = (1-t)/(1-w)

Ship Speed, V [knots]
Loading rate [%]
Speed of advance, VA [m/s]
RT [kN]
PE [kW]
Thrust [kN]

Specify the service speed for "Service profile"
Specify the average loading rate on transport mission (% of DWT)
Arriving water velocity at propeller Va = V(1-w) (V in m/s)

Total resistance (including added resistance and fouling)
Effective power PE = RT*V (V in m/s)

Required thrust per propeller T = RT/(1-t) (if more than one propeller, divide with number of propellers)

Minimum RPM [rpm]

Choose a minimum RPM for the propeller (0 is default, max=200)

Propeller results

RPM [/min] Revolutions per minute [n]

J [-]

EAR [-]

P/D [-]

No. blades Select a number of blades between 2-6

eta0 [-]

etaR [-]

etaS [-]

etaT [-]

PB [kW]

4 blades
Service Design

Alternative
Service Design

Propeller diagram

Select propeller Select propeller and click Go to Engine (3)

Go to Engine (3)

Propeller

DEToSC - Propeller, open water efficiency

Engine

Main engine selection

g fuel/kWh

ton fuel/day

Suggested engines:

SFOC (100% MCR)

SFOC (NCR) Normal Continous Rating (Service speed)

SFOC (min) lowest SFOC

Manufacturer

Name

No.

No. cyl.

Cyl. util. [%] Affects SFOC. Beneficial to fully utilize every cylinder.

[g/kWh]

[kg/day]

[g/kWh]

[kg/day]

[g/kWh]

[kg/day]

Required speed[kn]

ME-4 stroke:

Main engine 1:

Main engine 2:

Main engine 3:

Main engine 4:

Main engine 5:

Main engine 6:

Main engine 7:

Main engine 8:

Main engine 9:

Main engine 10:

Go to EEDI(4)

EEDI

DEToSC - EEDI

Main Engine, Type of fuel:
Auxiliary engine, Type of fuel:
Ice class:

4-stroke engine:
Main engine 1:

Main engine 2:

Main engine 3:

Main engine 4:

Main engine 5:

Main engine 6:

Main engine 7:

Main engine 8:

Main engine 9:

Main engine 10:

EEDI required, [gCO2/tnm]:

EEDI, [gCO2/tnm]:
At design speed:

EEDI, [gCO2/tnm]:
At service speed:

EEDI, [gCO2/tnm]:
At minimum SFOC:

gCO2/tnm:

Steady State 1

EEDI

Lpp:	Main Engine	Aux engines	PTI
BM:	f_j		f_j
B	SMCR total	AE power installed	PTI total
ds	PTO total
DWT	P_ME	P_AE	PTI 95%
Vref	CF_ME	CF_AE	CF_ME
Fn	SFC_ME	SFC_AE	SFC_ME
Disp	EEDI_ME	EEDI_AE	EEDI_PTI

	f_eff_me1	f_eff_ae1
	PA_eff	PAE_eff
	CF_ME	CF_AE
	SFC_ME	SFC_AE

WHR

On this page we will add calculations for whr potential. meanwhile check out

Ulrik Larsens web page

Ship: Select ship on Speed Power tab
Operating cond.:	Select OP-cond on Speed Power tab
Speed:

PropCurve
DP
ME1
ME2
ME3
ME4
ME5
ME6
ME7
ME8
ME9
ME10
cavdata

PROFILE AREA ENERGY EFFICIENCY - Display

Reference Vessels

PAEE Design evaluation tool

Reference vessels

Select vessel and condition

Select conditions

Steady State 1

Steady State 1

Compiled graphs

Time Domain

Steady State 1

Propeller data

ShipData

Choose Main Particulars

Ship particulars

Hull coefficients

Superstructure parameters

Calculate resistance

Speed-Resistance

Choose propulsion concept

Propeller

DEToSC - Propeller, open water efficiency

Engine

Main engine selection

Suggested engines:

EEDI

DEToSC - EEDI

Steady State 1

EEDI

WHR