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Vampire Energy Loss


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#1    Belial

Belial

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Posted 02 April 2010 - 02:41 PM

The wasted standby power (vampire energy loss) of individual household electronic devices is typically very small, but the sum of all such devices within the household becomes significant. Standby power makes up a portion of homes' miscellaneous electric load, which also includes small appliances, security systems, and other small power draws.

Standby power can be as high as 10 to 15 watts per device, and occasionally more.[1] A 2005 study estimates the number of standby appliances in the EU at 3.7 billion.[2] Although the power needed for functions like displays, indicators, and remote control functions is relatively small, the fact that the devices are continuously plugged in, and the number of such devices in the average household means that the energy usage can reach up to 22 percent of all appliance consumption, and around 10 percent of total residential consumption.[3][4]

Alan Meier, a staff scientist at the Lawrence Berkeley National Laboratory (LBNL) in Berkeley, noted that many household appliances are never fully switched off, but spend most of the time in a standby mode. His 1998 study estimated that standby power consumption accounted for approximately 5% of total residential electricity consumption in America, “adding up to more than $3 billion in annual energy costs”. According to America's Department of Energy, national residential electricity consumption in 2004 was 1.29 billion megawatt hours (MWh)—5% of which is 64m MWh. The wasted energy, in other words, is equivalent to the output of 18 typical power stations. His 2000 study showed that standby power accounted for around 10% of household power-consumption.

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