Return on Investment
Potential Power Modulation Benefits (case study)
Each smelter will have a different set of circumstances and during our feasibility study we would model the potential financial returns possible using EnPot to modulate power.
Example: This case is based on proven trial results and projected to a 320 pot smelter operating at 160 kA and cell voltage of 4.4V.
Basis of Calculation
- Reduction in amperage of 20kA only when power price is high and LME low
- Increase in amperage of 5kA when power price is low and LME is high
- Power prices based on Europe/US market examples
- Assumption made that power saved during reduced amperage periods can be sold back to the grid.
ACD = Anode Cathode Distance.
NOTE: Amperage reductions/increases are conservative in this example. Reductions of greater than 40 kA will be achievable with the EnPot system.
From proven data we can predict this type of smelter could go up 5 ka and down 40k resulting in a maximum possible benefit of US$21 million per annum and a best case ROI of 0.7 years
Conservative and Maximum Power Modulation Models
The calculations above are the conservative modulation model, the maximum benefit model shows this particular type of smelter could go up 5 ka and down 40ka resulting in a maximum possible benefit of: US$21 million per annum, with a best case ROI of 0.7 years.