Fuel efficiency index

[JoshTruman]

Good day,

Could anyone help me find the source of this formula?

I am attempting to locate the source of a formula concerning ship efficiency or fuel efficiency, which is calculated as follows: mass of cargo transported (DWT) / fuel consumed, representing the mass of fuel consumed per ton of cargo transported. While this formula is often associated with CO2 emissions in publications, I am not specifically considering CO2 emissions.

Does anyone know where I can find this information?
Or in some researches or books?
Best wishes

 

[philSweet]

From Wikipedia - Energy efficiency in transport - Wikipedia https://en.wikipedia.org/wiki/Energy_efficiency_in_transport

For passenger transport, the energy efficiency is normally measured in terms of passengers times distance per unit of energy, in the SI, passengers metres per joule (pax.m/J); while for cargo transport the energy efficiency is normally measured in terms of the mass of transported cargo times distance per unit of energy, in the SI, kilograms metres per joule (kg.m/J). Volumetric efficiency with respect to vehicle capacity may also be reported, such as passenger-mile per gallon (PMPG),[4] obtained by multiplying the miles per gallon of fuel by either the passenger capacity or the average occupancy.[5] The occupancy of personal vehicles is typically lower than capacity by a considerable degree[6][7] and thus the values computed based on capacity and on occupancy will often be quite different.

You can chase the links in the Wikipedia article to find proper source documents.