How do you calculate the carbon dioxide reduced by LiveCooler offsets?
The CO2 emissions reduction comes from swapping out an incandescent bulb with it’s equivalent CFL. Here are our key assumptions: Bulb Usage. The bulbs (incandescent and the CFL it replaces) are being used an average of 2.7 hours per day. This figure is based on interviews with home electricity efficiency experts and data gathered by electric utilities. Here is one online example of the data gathered: http://publicservice.vermont.gov/pub/other/marivtfinalresultsmemodelivered.doc CFL Efficiency. The CFL bulbs use 25% of the electricity of the incandescent bulbs. CFL Persistence. We assume that during the first year 98% of the CFL bulbs are still at work, year 2, 94%, year 3, 89%, year 4, 84% and year 5, 75% of the CFLs are still being used. Carbon dioxide per megawatt hour. So far, our bulbs are being installed in New England and in the Washington DC area. For New England electricity, we assume 1,107 pounds of CO2 per megawatt hour. This figure is ISO-NE’s marginal CO2 emissions rate. In
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