Conestoga College - Welding Technology Department
Arc Welding Power Supply Energy Operating Cost Comparison
Data Entry: Secondary Welding Output: Planned Operation: Amperes Volts Hrs/Day Days/Yr 260 A 30 V 16 hrs 250 days 20% Arc-On
Operating Factor:
Energy Cost: $ 0.150 $/kWh
Existing Model
Efficiency Idle Power Calculations: Idling Arc-On Idling Energy Arc-On Energy 3200 Hrs/yr 800 Hrs/yr 16000 kWh 31200 kWh 20% 5.0 kW
Proposed Model
Efficiency Idle Power 60% 1.0 kW
Idling Arc-On Idling Energy Arc-On Energy
3200 Hrs/yr 800 Hrs/yr 3200 kWh 10400 kWh
Total Energy Annual Cost $
47200 kWh 7,080
Total Energy Annual Cost $
13600 kWh 2,040
Annual Operating Savings
$
5,040
J. Galloway ( jgalloway@conestogac.on.ca )