Uptime Magazine - October/November 2008 - (Page 49)

sumed to continue to work as normal, with the efficiency remaining at 96.1%. The annual energy cost will then be $69,864 and the annual CO2 footprint will be 529 tons per year. (horsepower/efficiency) * 0.000746MW/hp * load * hours/year QualityRepair Year 1 2 3 4 5 6 7 8 9 10 Low Cost Repair Tons CO2 529 529 529 529 529 529 529 529 529 529 MWh/yr 873 873 873 873 873 873 873 873 873 873 $ / yr 69,865 69,865 69,865 69,865 69,865 69,865 69,865 69,865 69,865 69,865 MWh/yr 882 882 882 882 882 882 882 901 901 901 $ / yr 70,600 70,600 70,600 70,600 71,350 71,350 71,350 72,116 72,116 72,116 Tons CO2 535 535 535 535 540 540 540 546 546 546 MWh = Equation 1: MWh/year Energy Consumption Example 1: Annual Quality Repair Energy Consumption Overall (250hp/0.961eff) * 0.000746MW/hp * 0.75 load * 6,000 hrs/yr = 873.3 MWh/yr $Energy/year = MWh/yr * 1000kW/MW * $Cost/kWh Equation 2- Annual Energy Cost from MWh/year Totals 8,703 $698,650 5,290 8,907 $712,798 5,398 Table 1 - Energy and Carbon Footprint Information Comparison Example 2: Annual Quality Repair Energy Cost Overall 873.3 MWh/yr * 1000kW/MW * $0.08/kWh = $69,864/yr The result is a 14 month simple payback using the quality repair approach in the first rewind, coupled with 6 ton carbon footprint avoidance. In effect, the use of the low-cost repair facility increases your carbon foot- print. In the second repair period, the differences are: Annual CO2 Emissions = MWh/yr * 0.606 tons CO2/MWh Equation 3 - Annual CO2 Emmissions from MWh/year Example 3: Annual CO2 Emissions from MWh/ year 873.3 MWh/yr * 0.606 tons CO2/yr = 529 tons CO2/yr For the purpose of this article, we are not including the production impacts associated, as well as many other cause and effect issues. However, once we place the information on the quality repair and the low-cost repair into Table 1, the impact across ten years can be readily seen. In the first repair period, the differences are: • Repair: $875 • Energy Cost: $735/yr • Carbon Footprint: 6 tons/yr CO2 www.uptimemagazine.com 49 http://www.philamixers.com http://www.philamixers.com http://www.uptimemagazine.com

Table of Contents Feed for the Digital Edition of Uptime Magazine - October/November 2008

Uptime Magazine - October/November 2008 Contents Upfront Upclose: An Asset Management Oasis in the Desert Information Technology: Streamlining Through Simplicity Lubrication: Phases for Framing a Solid Foundation Infrared: Do Your Homework Before You Buy Maintenance Management: Get It Together by Getting Together Motor Testing: Key Elements in Motor Decision Making Precision Maintenance: Shedding Some Light on Tolerances Reliability: RCM & the Mortgage Meltdown Ultrasound: A Multidimensional Tool Vibration: The Whirling Pump Mystery, Solved with ODS Upgrade: Are You Looking in the Right Place for Your Wear Debris?

Uptime Magazine - October/November 2008

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