Energy Efficiency and Renewable Energy in SIPs and TIPs

Emissions Quantification Methods Comparison

Key Considerations		Methods
Key Considerations		eGrid non-baseload	Capacity Factor	Hourly Emissions	Energy Modeling
Purpose	Preliminary Analysis	well-suited for intended purpose	well-suited for intended purpose	well-suited for intended purpose	not well-suited (either too costly or not robust enough)
	Voluntary Programs	well-suited for intended purpose	well-suited for intended purpose	well-suited for intended purpose	not well-suited (either too costly or not robust enough)
	General Benefits Info	well-suited for intended purpose	well-suited for intended purpose	well-suited for intended purpose	well-suited for intended purpose
	Regulatory or statutory requirement	not well-suited (either too costly or not robust enough)	acceptable*	well-suited for intended purpose	well-suited for intended purpose
Emissions	Pollutants of interest	CO2, NOx, SO2, CH4, N2O	NOx, SO2, CO2	NOx, SO2, CO2	NOx, SO2, CO2, varies
Scale	Geographic	eGRID subregion	eGRID subregion	Regions vary	modeling regions
	Imports & Exports	Only within eGRID regions	Only within eGRID regions	Depends on size of regions	Fully addressed
	Source Aggregation	Boiler, generator, plant	Power plant or Electric Generating Unit (EGU)**	Electric Generating Unit (EGU)	Electric Generating Unit (EGU)
	Temporal - time scale, historical vs forecasted	Annual & ozone season (NOx) historical	Annual & ozone season (NOx) historical	Hourly historical	Annual, seasonal, hourly forecasted
Resources	Time	Low	Low	Medium	High
	Money	Low	Low	Medium	High
	Staff Expertise	Low	Low	Medium	High

Notes:
* Better suited when electric generating unit (EGU) capacity factors are used and future generation is included. When appropriate, the outputs could also be at the county level. See Roadmap, Appendix I for details.
** Electric generator units encompass boilers, combustion turbines, internal combustion engines, or other electric generating technologies.