Actual store data
The dots represent individual short-term average values while the lines are regression models that were fit to the observed data.
The baseline data and regression model (without the FTE active) is red while the FTE-active data is green.
Applying the regression models to typical meteorological year data shows that operation of the FTE technology provided annual energy savings at a level of 7.9% of the rack and gas cooler energy use.
Utility system summer peak demand savings was lower at 2.2%. For this store, the percent savings translate to 35,395 kwh per year, or about $3,900 per year based on typical electric rates in Minnesota.