Energy Efficiency
Energy Efficiency.
Save $147.84 with just one light bulb.
Use just one 23-watt CFL instead of a 100-watt incandescent and you can save $147.84 based on the 2008 rate of $.20/kwh with the light on 10,000 hours (little more than one year if on all day and night.) Calculate your own savings at www.thebulb.com/store/t-cflmath.aspx.
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Case Studies from Rise Engineering
Leviton Manufacturing, Warwick , RI
Fluorescent lighting, occupancy controls : $178,000 yearly savings, 1.9 year payback , $226,000 utility incentive
Providence Metalizing, Pawtucket , RI
Lighting, motors and variable speed drives: $77,000 yearly savings, 1.8 year payback, $64,000 utility incentive
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You may save 20% if you use a programmable thermostat instead of a manual thermostat
Save $200 a year with just one smart power strip
Put just one computer on a smart power strip and you may save $200 a year if the cost of electricity is $.20 per kwh. How many computers are left on in your office? In many offices computers are on 24 hours a day, seven days a week. Savings add up quickly. A $20 investment may be paid back in 5 weeks by saving electricity costs!
A mid-sized company could save more than $165,000 a year
just by turning off its computers at night.
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Calculating Payback on Smart Power Strips
Although prices vary, the average smart power strip could add a premium of about $20 to the cost of a regular power strip with equivalent surge protection. If the strip controlled 50 watts worth of task lights and a monitor using 100 watts, and electricity cost an average of 10 cents per kilowatt-hour, the device would pay for itself after preventing about 1,333 hours of operating time—a matter of less than two months if equipment otherwise would be left on 24 hours a day. How did we get this number? By multiplying the power saved (in kilowatts) by the energy rate, then dividing the cost premium by that product: $20 ÷ (0.15 kW x $0.10/kWh) = 1,333 hours. To determine how long it would take to eliminate 1,333 hours of operating time, first determine how many hours a day a smart power strip might prevent that equipment from operating. For example, a typical workday might be 9.5 hours long, during which monitors are inactive for 5.5 hours. Assume that the equipment is turned off at night and that the occupancy sensor time delay adds a half hour per day of operating time before the equipment is turned off. Then the smart power strip would save about five hours per day of operating time and pay for itself in 267 working days, or just over one year. If equipment is otherwise left on nights and weekends, the savings would be 143 hours per week for a payback of less than 10 weeks. www.uppco.com/business/eba_3.aspx (Upper Peninsula Power Company)
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| Nearly half of all corporate computers in the United States don't get turned off at night, costing U.S. businesses $1.72 billion in annual energy costs and spewing 14.4 million tons of carbon dioxide into the atmosphere per year, according to a new report. Let's give those numbers some context: A midsize company with around 10,000 PCs wastes more than $165,000 per year in electricity costs for computers left on overnight, while contributing 1,381 tons of carbon dioxide to the atmosphere. Giving those same computers a breather every night would have roughly the same effect as taking 2.58 million cars off the road, which is more than the number of autos zipping around the entire state of Maryland . http://www.ase.org/content/article/detail/386 (June 2007) |
Weatherize doors and windows
A ¼ inch crack around a door is the same as an open window.
| “It’s only a little crack” - Example A pair of exterior doors with no weather stripping can have an opening of ¼” where the doors meet. While this doesn’t look or sound like much, on a 6’ 8” high pair of doors, it adds up to the equivalent of a 20-square inch opening. A similar gap in just two average-size double-hung windows, where the sashes meet, would add up to the same 20 square inch hole! In a typical setting, this 20 square inch hole would allow over 40 cfm into or out of the building. This air infiltration could cost up to $54 per year in heating and cooling costs. [NOTE: This was in August 2004. Energy costs are much higher now.] www.p2pays.org/ref/34/33606.pdf |
Filtered water saves
80 percent of bottles end up in landfills. .. Bottles for American consumption in 2006 required the equivalent of more than 17 million barrels of oil. http://en.wikipedia.org/wiki/Bottled_water
