CO2FUEL function:
Emissions from Fuel Consumption.

This computes the emissions from stationary combustion fuels which are burnt in a fixed unit or asset owned or controlled by the reporting organization, and usually reported as a Scope 1 direct emission. The source of data and methodology of emission factor calculation are from UK government's GHG conversion factors for company reporting and Ministry of Business, Innovation and Employment (MBIE)'s data of 2022 from New Zealand.

Introduction

Parameters

fuel_usage : Mandatory. The usage of the fuel can be entered as either "commercial", "industrial", "transport" or "residential". If left blank, it will default to "commercial". Note that "commercial" is to be used for fuels used at sites or properties where commercial activities take place. "industrial" is used when combustion takes place at sites where industrial processes occur or within engines that support industrial activities. "residential" can be applied for fuel used primarily at residential properties. "transport" in this category is for the fuel used in an engine to move a vehicle.

fuel_name : Mandatory. A blank value will result in an error. Described here are the fuel types (within quotes) that are to be used. They are divided into categories for ease of understanding:
  • Petrol: Two types of petrol can be used under the fuel_usage category of transport. They are "Premium Petrol" and "Regular Petrol".
  • Coal: Four ranks of coal can be used under any of the fuel_usage categories of commercial, industrial or residential. The values are: "Coal - Default", "Coal - Bituminous", "Coal - Sub-Bituminous" and "Coal - Lignite".
  • Diesel: Use "Diesel" under any of the fuel_usage categories of commercial, industrial or transport.
  • LPG: Use "LPG" under any of the fuel_usage categories of commercial, industrial or transport.
  • Fuel Oils: Two types of fuel oils can be used under the fuel_usage categories of commercial, industrial or transport. They are "Heavy Fuel Oil" and "Light Fuel Oil".
  • Natural Gas: Use "Natural Gas" under fuel_usage categories of commercial or industrial.
  • Aviation Fuels: Use "Aviation fuel - Kerosene" or "Aviation gas" under fuel_usage value of transport.

fuel_value : Mandatory. A blank value will result in an error. The unit of fuel_value is fixed for the categories of fuel as per the following rules:
  • Petrol: "litre"
  • Coal: "kg"
  • Diesel: "litre"
  • LPG: "kg"
  • Fuel Oils: "litre"
  • Natural Gas: "kWh"
  • Aviation Fuels: "litre"

Usage

Example
CO2FUEL(fuel_usage, fuel_name, fuel_value)
CO2FUEL("industrial", "Coal - Bituminous", "2800")

Notes

  1. These emissions could be reported as Scope 3 indirect emissions if the organization does not own or control the asset (eg, a boiler) where the combustion takes place.
  2. It should be noted that the footprint calculated here does not use the full fuel-cycle emission factors and hence do not incorporate the indirect (Scope 3) emissions associated with the extraction, production and transport of the fuel.