Add input emission rates

[gailin-p]

eGRID provides both input and output emission rates.

Input emission rates can be useful in cases where fuel consumption is known in real time or near real time but emissions are not -- in this case, calculating emissions with [input emission rate x consumed fuel] can better capture variability in emissions than [output emission rate * hourly generation].

It would be great to provide input emission rates at the month and annual level.

[grgmiller]

What are some use cases you see for providing input emission rates? Shouldn't the input emission rate just be the same as the emission factors in data/manual (like these)?

Answering my own question: I guess if a plant burns multiple fuels or switches fuel throughout the year, the input emission rate would be different than one of the combustion emission factors.