Savings Calculator by PastorGallo

VIEWS: 450 PAGES: 2

More Info
									Savings Calculator
Enter inputs in black. Outputs/results are in blue.
Enter Assumptions:
Average Daily Use, hours              3        Energy Star Assumption
Compact Fluorescent Bulb life, hours            10,000 Most currently available CFLs are rated for 8,000 to 12,000 hours (dependin
North Carolina Average Residential Electricity Rate (cents/kWh)        9.12      Energy Star data
Pounds of Coal required to produce 1 kWh electricity:       0.963 0.963 derived from Energy Star assumptions for Coal emissions factor &
Coal CO2 emissions factor (Pounds CO2/kWh coal generation):            2.06      2.06 from Energy Star assumptions
NC-specific energy mix emissions factor (Pounds CO2 from overall fuel mix):         1.29     See NC Electr. Sources & CO 2 tab

Annual Savings
                                                             Coal                      CO2
                                                             Savings,      Coal        savings,      CO2
                                                             pounds        Savings,    pounds        savings,
                                                             per year if   pounds      per year if   pounds
                                              Annual         100%          per year    100%          per year
Replaced                            kWh       Energy         coal          assuming    coal          assuming
Bulb     New Bulb Wattage           saved per Cost           generatio     NC fuel     generatio     NC fuel
wattage  Wattage savings            year      savings        n             mix         n             mix
    60      15       45               49.28     $4.49          47.45         28.71       101.51         63.56
   100      23       77               84.32     $7.69          81.20         49.12       173.69        108.77

Bulb Lifetime Savings
                                                             Coal                      CO2
                                                             Savings,      Coal        savings,      CO2
                                                             pounds        Savings,    pounds        savings,
                                                             over CFL      pounds      over CFL      pounds
                                                             life if       over CFL    life if       over CFL
                                    kWh          Lifetime    100%          life        100%          life
Replaced                            saved        Energy      coal          assuming    coal          assuming
Bulb     New Bulb Wattage           bulb         Cost        generatio     NC fuel     generatio     NC fuel
wattage  Wattage savings            lifetime     Savings     n             mix         n             mix
    60      15       45                  450       $41.04       433.35        262.18       927.00       580.50
   100      23       77                  770       $70.22       741.51        448.61      1586.20       993.30

Years operation                     Costs in $, Coal and CO2

                                                                                                     Lifetime
                                                                                       Lifetime      Pounds
                                                                                       Pounds        Coal
                                                                                       Coal          used,
                                                 Bulb                  Lifetime        used, if      assuming
Daily hrs Bulb life     Years                    "lifetime", kWh used Energy           100% coal     NC fuel
operation hrs           operation Watts          hrs         lifetime  Cost            generation    mix
     3      10,000       9.13242     15             10,000        150    $13.68          144.45         87.39
                                     60             10,000        600    $54.72          577.80        349.57
                                     23             10,000        230    $20.98          221.49        134.00
                                    100             10,000       1,000   $91.20          963.00        582.62
ted for 8,000 to 12,000 hours (depending on bulb)

Star assumptions for Coal emissions factor & carbon content
Energy Star assumptions
 See NC Electr. Sources & CO 2 tab




                              Lifetime
               Lifetime       Pounds
               Pounds         CO2
               CO2            generated
               generated      ,
               , if 100%      assuming
               coal           NC fuel
               generation     mix
                     309.00       193.50
                   1236.00        774.00
                     473.80       296.70
                   2060.00       1290.00

								
To top