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Energy Audit Project

By: Period 3A 3-19-2012. Energy Audit Project. 1. Project Objectives. Determine appliance voltage, watts, and amps Estimate time of usage per month Determine cost per kWhr from Power Bill Determine total monthly cost per appliance

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Energy Audit Project

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  1. By: • Period 3A • 3-19-2012 Energy Audit Project 1

  2. Project Objectives • Determine appliance voltage, watts, and amps • Estimate time of usage per month • Determine cost per kWhr from Power Bill • Determine total monthly cost per appliance • Rank order each appliance from most expensive to least expensive 2

  3. Cost per kWhr • March power bill = $182.26 • Total kWhr used in March = 1842 • Cost per kWhr = $182.26/1842 kWhr • Cost = $.098 / kWhr 3

  4. Refrigerator • 115V, 5.0A, 575W • Runs 6 hour/day on average • 180 hours / month usage • kWhr of Energy used per month: kWhr/month = 575W x 180 Hrs per month = 103500/1000 = 103.5 kWhr/month • Total Cost / month = $.098 x 103.5 = $ 10.14 4

  5. Television • 120V, 1.8A, 213W • Runs 8 hour/day on average • 240 hours / month usage • kWhr of Energy used per month: kWhr/month = 213W x 240 Hrs per month= 51120/1000 = 51.12 kWhr/month • Total Cost / month = $.098 x 51.12= $5.00 5

  6. Dishwasher • 120V, 9.6A, 1152W • Runs 1 hr/day on average • 30 hrs / month useage • kWhr of Energy used per month: kWhr/mo = 1152W x 30 Hrs per month = 34560/1000 = 34.6 kWhr/mo • Total Cost / mo = $.098 x 34.6 = $3.41 6

  7. Laptop • 10.8V, 5.1A, 55W • Runs 6 hours / day on average • 180 hours / month usage • kWhr of Energy used per month: kWhr/month = 55W x 180 Hrs per month= 9900/1000 = 9.9 kWhr/month • Total Cost / month = $.098 x 9.9 = $ 0.97 7

  8. Alarm Clock • 120V, .05A, 6W • Runs 24 hour/day on average • 720 hours / month usage • kWhr of Energy used per month: kWhr/month = 6W x 720 Hrs per month = 4320/1000 = 4.32 kWhr/month • Total Cost / month = $.098 x 4.32 = $ 0.42 8

  9. Energy Cost RankingMost expensive to least expensive • #1 Refrigerator • #2 Television • #3 Dishwasher • #4 Laptop • #5 Alarm clock 9

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