Hybrid power plants encompassing Thermal, PV and Storage, are being offered to mining projects either on or off grid, where a solution exists to provide 100% secure power, significant reductions in fuel costs, CO2 emissions and overall costs of electricity.
For On-grid solutions:
PV + storage can meet a significant portion of a plant’s energy needs at competitive pricing and reduce overall cost of electricity.
PV + storage can provide a ‘buffer’ in times of outage, allowing time for back up thermal power to come online, providing a seamless transition of power supply and a significant increase in power quality to the mine.
For Off-grid solutions:
PV + storage can reduce thermal generator capacity and spinning reserve requirements, leading to lower capex and O&M costs, significant fuel cost savings and a hedging solution against fuel price increases and/or future carbon costs.
POTENTIAL HYBRID POWER SOLUTION SAVINGS
AE recently completed a feasibility study for a mine in West Africa, with a power demand of 20.5MW, but suffering from grid outages resulting in millions of dollars of production losses per year, and needed an off-grid solution.
AE engineered a solution comprising PV + lithium-ion battery + HFO genset hybrid solution resulting in substantial potential savings for the mine, as shown in the table below.
|SIGNIFICANT MINE SAVINGS DUE TO HYBRID SYSTEM INSTALLATION|
|Production losses||Cut to zero saving millions of USD|
|Direct power savings||USD $3.4m/year|
|Annual fuel savings (using a hybrid system instead of a full HFO solution)||5,040 tonnes of HFO per year|
|CO2 savings||298,219 tonnes of CO2 over the 19 year life of the mine|
|Potential LOM carbon tax savings*||USD $7.45m – $14.91m|
*Should proposed pricing of USD $25 – $50/tCO2e from the Paris Climate Accord come into effect