Question

If you use your office computer 15 hours per week, and do not unplug it when it is not in use, how much carbon dioxide is produced from the vampire energy used by the office computer in one year ? help (energyvampires)

Express your answer rounded to the nearest tenth of a pound of carbon dioxide.
lb of CO2

Stand-by Power Consumption by Type of Appliance

Appliance Category	Appliance	Average Power Consumption in Watts
Audio	Portable Stereo	1.66
	DVD Player	1.55
	Clock Radio	2.00
Office	Computer	2.84
	Printer, Ink Jet	1.26
	Copier	1.49
	Phone, Cordless	2.81
	Phone, Cordless with Answering	2.92
	Answering Machine	2.0
Entertainment	Television	3.06
	DVD Player	1.55
	Cable Box with Remote	17.83
	Satellite System	15.66
	Video Game	1.01
Kitchen	Coffee Maker	1.14
	Microwave	3.08
Home	Air Conditioner	0.90
	Heating, Central	2.84
	Security System	2.70
	Garage Door Opener	4.48

Answer 1

Number oh hours in a day = 24 hours

Number of days in a week = 7 days

Number of weeks in a year = 52 weeks

Number of hours in a week = (24 hours)*(7 days) = 168 hours

Number of hours computer in on in a week = 15 hours in a week

Number of hours computer is not used but plugged in per week = (168-15) hours = 153 hours in a week

Number of hours computer is not used but plugged in per year = 153*52 = 7956 hours

Number of hours Computer is on per day = 153/(7 days) = 21.85 hours

Average Power Consumption in Watts per hour when plugged in but not in use = 2.84 W/hour

Power consumption in a day when computer is plugged in = (2.84 watts/hour) * (21.85 hours) = 62.074 W in a day ~ 62W

Power consumption in a year when computer is plugged in = (62 watts) * (365 days) = 22650 watts = 22.65 kWh

From the given below website, we can find the relation between kWh and CO2 emission.

"https://www.energuide.be/en/questions-answers/how-much-power-does-a-computer-use-and-how-much-co2-does-that-represent/54/"

It is given 600kWh produces 175 kg of CO2

22.65kWh produces CO2 equivalent to = (175 kg / 600kWh) * 22.65 kWh

= 6.60625 kg of CO2 emission

1kg = 2.20462 lb

6.60625 kg = (2.20462*6.60625) lb

= 14.564270875‬ lb of CO2 emission

Therefore, total carbon dioxide emission due to vampire energy of computer is 14.564270875 lb.