spread_initiator

initiator
Hamburg
Germany

Stand-by Heroes – taking charge of change

Blog – in Detail

Dwight Cribb's picture

The math about turning off stand-by appliances

12. March 2009, 00:06

I sat down to do the maths, and here is what I came up with:

Stand-by Electricity Consumption (Watts)
Hifi/Stereo - 12W
TV - 10W
Video Recorder - 1W
DVD Player - 7W
Digital TV top box - 5W
Computer + Peripherals - 15W
Computer Monitor - 11W
Laptop - 2W
Broadband Modem - 14W
Answer Machine - 3W
Mobile phone charger - 1W
Laptop Charger - 3W

My personal energy savings from turning off appliances is as follows:

Hifi-Stereo on standby - 23 hours per day - 276 Watts
TV on standby - 23 hours per day - 230 Watts
DVD Player on standby - 23.9 hours per day - 167 Watts
Laptop on standby - 10 hours per day - 20 Watts
Mobile phone charger on standby - 20 hours per day - 20 Watts
Total 713 Watts per day (29,7 Watts/hour)

Note: I can not yet bring myself to shut down my Broadband Modem

If we assume that is an average saving, we would save

30 kw/h or 262.800 kwh p.a. - 1.000 supporters
300 kw/h or 2.628.000 kwh p.a - 10.000 supporters
3 mw/h or 26.280.000 kwh p.a. - 100.000 supporters
30 mw/h or 262.800.000 kwh p.a - 1.000.000 supporters
300 mw/h or 2.628.000.000 kwh p.a. - 10.000.000 supporters

30 kw/h = 300 TVs running non-stop = 141124 kg CO2 p.a = EUR 52.560 p.a.
300 kw/h = 25.000 Stereos running non-stop = 1.411.236 kg CO2 = EUR 525.600 p.a
3 mw/h = 200.000 PC systems running non-stop = 14.112.360 kg CO2 = EUR 5.256.000 p.a.
30 mw/h = 500.000 60W light bulbs burning non-stop = 141.123.600 kg CO2 = EUR 52.560.000 p.a
300 mw/h = 1fair sized power plant running non stop = 1.411.236.000 kg CO2 = EUR 525.600.000 p.a

Calculations based on information provided at
http://www.nef.org.uk/greencompany/co2calculator.htm
http://www.bettergeneration.co.uk/ideas-for-saving-energy/leaving-electr...
Average German kwh price for private consumers in January 2009 said to be EUR 0,20.