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NC-v4.1 EAp2:Minimum Energy Performance

GHG Emission Factor for Saudi Arabia

We are trying to figure out the GHG emission factor for Saudi Arabia. We cannot find a reliable emission factor in any local sources, while LEED v4.1 manual quoted "For international project - use national grid mix coefficients from the International Energy Agency CO2 Emissions from Fuel Combustion 2017 report to calculate GHG emissions by energy source ". Does it mean we can use the emission factors in this report directly?

It quoted 0.721kg CO2/kwh electricity and 0.582kg CO2/kwh natural gas in 2013-15 average - are these reasonable assumptions to be adopted in Saudi Arabia?

Meanwhile, we are told that Saudi Arabia does not use Natural Gas but LPG. And thus we tried to look into the LPG emission factor as well but it doesn't appear in this report. Anyone know where we can find the emission factor for LPG in Saudi Arabia?

Many thanks!

 

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Thu, 03/03/2022 - 15:25

Yes, you should be able to use the emissions factors from the referenced report directly.  I do not have a copy of the report, but 0.721 kg/kWh for electricity seems reasonable. However, 0.582 kg/kWh for natural gas seems very high. Are you sure those units are correct? For comparison, the Energy Star Portfolio Manager emissions factor for natural gas in the U.S. is 53.11 kG/MBtu (0.181 kg/kWh). Natural gas emissions do not vary significantly like electricity. I'm not aware of other sources for you to find the emissions factor for LPG. Here are some suggested work-arounds:
  1. Once you find a reliable local emissions factor for natural gas, apply the ratio of propane to natural gas emissions factors for the U.S. from Energy Star Portfolio Manager (64.25/53.11) to this value. 
  2. The LEED v4.1 Minimum Energy Performance Calculator includes an option for using the ISO 52000-1:2017 methodology, and automatically populates a propane emissions factor of 70.10 kg/MBtu. 

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