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