EEDI Innovative-Technology Credit

Model the EEDI numerator credit for Category A / B / C energy-saving technologies per MEPC.1/Circ.815 - shaft generators, waste-heat recovery, wind assist, air lubrication, and more.

IMODesignMEPC.1/Circ.815

Scenario

Attained EEDI without creditgCO₂ / t·nmCapacityDWT or GTReference speedkn

Innovative-tech credit (numerator subtraction)

CategoryCat A - reduces auxiliary energy use. Cat B - generates electricity (shaft gen, WHR). Cat C - reduces propulsion power (wind, air lube).Effective power saving (

P_{\text{eff}}

)kWTime-averaged saved power under typical operating conditions.Availability factor

f_{\text{eff}}

Availability of the saving under IMO standard operating conditions. 0.5 is a common conservative default for wind assist.Main engine SFCg/kWh

Numerator credit: 164,419g CO₂ / h

Attained EEDI with credit: 3.857gCO₂ / t·nm

With credit subtracted from numerator.

Reduction: 3.6%

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\text{Credit} = f_\text{eff} \cdot P_\text{eff} \cdot C_{f,\text{ME}} \cdot \text{SFC}_\text{ME}

Symbol	Meaning	Unit
$Credit$	Numerator subtraction	g CO₂ / h
$f_\text{eff}$	Availability factor
$P_\text{eff}$	Effective saved power	kW
$C_{f,\text{ME}}$	Main-engine fuel CO₂ factor	t CO₂ / t
$\text{SFC}_\text{ME}$	Main-engine SFC	g/kWh

Source: IMO MEPC.1/Circ.815; IMO MEPC.328(76)

In short

Model Category A/B/C energy-saving-technology credits in EEDI - shaft gen, WHR, wind assist, air lubrication - per IMO MEPC.1/Circ.815.

Learn the theory BIMCO CII and Emissions Clauses