KPI030 | SOx efficiency V3.0

Key Performance Indicator

This KPI expresses the energy efficiency of a ship by comparing emitted mass of SOx emitted relative to the transport work performed.

Interpretation	The expression gives the emitted mass of SOx per ton cargo transported per mile. As the PI value "Emitted mass SOx" is to be given in kg, the figure is multiplied by 1 thousand to get the KPI value in g/transport work (tonmile, passengermile, TEUmile, etc).
Notes	The issue of SOx efficiency is complicated by the fact that there are several influencing factors. The commercial operator is responsible for utilization of the ship’s capacity hereby affecting the transport work. The other main factor regarding transport work is the market itself. Ship’s attributes such as hull design, engine type (and to some extent age) as well as the load factor for each voyage are all influencing the quantity of emitted mass of SOx through the amount of fuel burned.
Unit	g/[Cargo Unit] mile
Scope	Ship level
Calculation period	Quarterly

Formula

[formula]KPI030 = \frac {PI009} {PI064} \times 10^3[/formula]

PI009	Emitted mass of SOx
PI064	Transport work

Example

PI009	Emitted mass of SOx	= 2000000 kg
PI064	Transport work	= 20,710,647,000 ton mile
KPI Value	SOx efficiency	= 0.097

Rating Formula

[formula] \begin{align} \displaylines { KPI_{Value}\\ KPI_{MinReq} = 1.5\\ KPI_{Target} = 0.6 } \end{align} [/formula] [formula] KPI_{Rating} = 100 \times \frac {(KPI_{Value} - KPI_{MinReq})} {(KPI_{Target}-KPI_{MinReq})} [/formula]

Rating Example

KPI Value	= 0.097
KPI MinReq	= 1.5
KPI Target	= 0.6
KPI Rating	[formula]=KPI_{Rating} = 100 \times \frac {(KPI_{Value} - KPI_{MinReq})} {(KPI_{Target}-KPI_{MinReq})} = 100 \times \frac {(0.097 - 1.5)} {(0.6-1.5)} = 100[/formula]

External references

SEEMP, MEPC.1/Circ.684, GUIDELINES FOR VOLUNTARY USE OF THE SHIP ENERGY EFFICIENCY OPERATIONAL INDICATOR (EEOI), and EU MRV