Over the course of the last three days I have recorded my personal daily energy consumption. As I mentioned in the earlier post, my record of consumption was based off of the objects I have control over. Below are my findings:
MONDAY:
| Electronics |
Wattage |
Time |
Consumption |
| iPhone |
5 Watt |
10 Hrs |
50 Wh |
| MacBook |
60 Watt |
6 Hrs |
360 Wh |
| Speakers/Radio |
50 Watt |
4 Hrs |
200 Wh |
| Light 1 |
60 Watt |
8 Hrs |
480 Wh |
| Light 2 |
40 Watt |
8 Hrs |
320 Wh |
| TV |
300 Watt |
0 Hrs |
|
| Hair
Dryer |
1875 Watt |
3 min |
93.75 Wh |
| Fan |
200 Watt |
12 Hrs |
2400 Wh |
| Printer |
75 Watt |
10 min |
12.5 Wh |
| Electronics |
Wattage |
Time |
Consumption |
| iPhone |
5 Watt |
8 Hrs |
40 Wh |
| MacBook |
60 Watt |
4 Hrs |
240 Wh |
| Speakers/Radio |
50 Watt |
0 Hrs |
|
| Light 1 |
60 Watt |
3 Hrs |
180 Wh |
| Light 2 |
40 Watt |
3 Hrs |
120 Wh |
| TV |
300 Watt |
30 min |
9000 Wh |
| Hair
Dryer |
1875 Watt |
3 min |
93.75 Wh |
| Fan |
200 Watt |
10 Hrs |
2000 Wh |
| Printer |
75 Watt |
0 Hrs |
|
| Electronics |
Wattage |
Time |
Consumption |
| iPhone |
5 Watt |
14 Hrs |
70 Wh |
| MacBook |
60 Watt |
7 Hrs |
420 Wh |
| Speakers/Radio |
50 Watt |
3 Hrs |
150 Wh |
| Light 1 |
60 Watt |
6 Hrs |
360 Wh |
| Light 2 |
40 Watt |
6 Hrs |
240 Wh |
| TV |
300 Watt |
0 Hrs |
|
| Hair
Dryer |
1875 Watt |
3 min |
93.75 Wh |
| Fan |
200 Watt |
12 Hrs |
2400 Wh |
| Printer |
75 Watt |
0 Hrs |
|
Over the course of the week, I recorded the different times I used the particular electronics. I realized that I do not use all the objects everyday. For those objects I do use everyday, their usage varied. The objects I used the least were the TV and Printer. Objects I used the most were my fan and my cell phone. Phone usage was marked by battery life; how long it lasted that day, not how long I was physically on my phone each day. The life of the battery varied greatly depending on use per day. On Tuesday afternoon I called home, and that drastically cut the life of my phone battery. Today I barely touched my phone. I really only looked at it to check the time or quickly answer text messages. Computer life and usage varied as well. Today, my computer usage is much higher, because this is one of the only courses for which I need to use the computer at the moment. My other courses are more reading based, and readings come from books or printed handouts. The energy consumption of the lights in my room, is dependent on my presence in the room. I turn the lights on when I wake up in the morning, and again when I get back to my room at night. The fan in my room is probably one of the most frequently used objects in my room. I turn it on when I arrive back in my room, and I leave it on while I sleep. This exercise made me more aware of the objects in my room that I use. It was also interesting to determine how much power each of these objects use. I was actually pretty surprised to learn just how much power a fan uses. I was also surprised to find (this is assuming this is correct) that my computer uses only about 60W/hour, while the color tv uses around 300W. I wonder how much power consumption varies depending on the different tasks each object must fulfill. For example, if you are watching a movie on your computer does the power consumption vary, and is this what causes the battery to die sooner?
That's an interesting question! I was wondering the same thing. My first guess was that it's mostly screen brightness that uses the most power, but I think the purpose of the "sleep" and "hibernation" functions is to not only turn off the screen but also stop running open apps. The energy it consumes is just to save the material that was open and be ready to turn back on. But, I read it's probably better to just unplug chargers and plugs we use for fans and hair-dryers when we're not using them because those kind of have a standby mode as well. This is an old article on standby power, but check it out! http://www.economist.com/node/5571582
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