Emission to energy conversion

In some of our reports, like the SECR report and the full inventory export, you will find energy consumption associated to your emissions. This energy consumption is always expressed in kWh and is derived in one of two ways.

• Directly from the publisher itself, e.g., an energy conversion value (like kWh/km) is provided by the dataset used.
• Derived from the source based on the available emission factors.

In the second scenario, a common example would be that the dataset has both (a) kgCO2e/kWh and (b) kgCO2e/kg for a given fuel. Carbon+Alt+Delete will then divide b by a to get to the kWh/kg.

In some cases, a unit conversion will also take place, if for instance the energy value in an emission factor is expressed in GJ rather than kWh.

Example

Let's use 100% mineral diesel from uk.gov as an example. It has the following emission factors for litres and kWh (in the combustion stage):

• 2.66155 kgCO2e/litre
• 0.26808 kgCO2e/kWh

Now, by dividing 2.66155 by 0.26808 we get the energy density value, which is ~9.92819 kWh/litre.

So if we for example originally input 100 litres of diesel using this emission factor, we would get an energy value of 992.819 kWh.