ROI-Sheet

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ROI-Sheet
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 )


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