I am using the REOpt tool from the U.S. National Renewable Energy Lab to help in sizing a new battery energy storage system and solar PV array for an existing building. The building already has a natural gas-fueled generator, and the cost to operate this should be accounted for in the optimization. Further, the site has emissions reduction targets, so the emissions from this generator need to be modeled.
The problem is, REOpt assumes that any generator is diesel fueled. How can I express these parameters of a natural gas generator in equivalent terms for a diesel generator in order to correctly run the model? Is it as simple as multiplying everything by the conversion factor for gallons to therms, or will it be more complicated?
|Input||Diesel units (input)||Natural gas units (known)|
|Fuel burn rate||gallons/kWh||therms/kWh|
|Fuel consumption curve y-intercept||gallons/hour||therms/hour|
|Generator fuel emissions factors (CO$_2$, NOx, SO$_2$, and PM2.5)||lb/gal||lb/therm|
To enable generator input parameters you first need to select "Resilience" as a goal, then "Generator" as a technology. Select "Advanced inputs" to see additional parameters. Emissions rates are in the "Renewable Energy & Emissions" section under "Advanced inputs."