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Questions tagged [energy-use]

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21
votes
3answers
3k views

Do USB outlets waste energy just like conventional wall warts?

It is widely known that most AC-DC converters (aka "wall warts") continually use electricity, even when no devices are plugged in to them. That wasted energy is often called "phantom electricity" or "...
11
votes
1answer
1k views

Do switchable sockets left “on” use electricity if there's nothing plugged in?

My flat is fitted with switchable sockets as per below: Please settle an argument a friend and I are having: if a socket is switched "on", is it wasting electricity if nothing is actually plugged ...
11
votes
2answers
202 views

Should I replace existing inefficient light bulbs?

Similar to this question (except that's about cars), if I can buy more efficient light bulbs than the ones I'm using right now, should I? Or is it better to wait until my current light bulbs expire, ...
9
votes
6answers
401 views

How can I use my own body as an energy source for greater environmental sustainability?

I've had the epiphany that my body is a living vessel of energy production (and consumption), just like all other energy sources and associated forms of consumption or re-allocation around me. My ...
9
votes
2answers
9k views

How much power does an idle PC use?

My university's IT department has recently sent everybody an email asking us to leave our computers on at night, every night, so that they can do remote maintenance. They say "Despite what you may ...
6
votes
4answers
2k views

Which is more energy efficient? Heating ten 1L water separately or one 10L water directly

Just like the title said. In my house, we are very heavy tea drinkers. So my mother tends to boil a lot of water every day. She usually does this with a small amount of water (1-2L) every time she ...
5
votes
1answer
365 views

Electrical usage data logging with wireless data transfer

Does anyone know of a wireless energy usage capture device, that one can attach to an appliance and find out the energy usage? I know that there are certain energy monitors that do the job to some ...
5
votes
2answers
485 views

Is it worthwhile to collect leaves that fall in autumn from trees for biogas production?

I observe every year in autumn that fallen leaves are piled and left to rot. Assuming there are biogas facilities (say within 10 miles) is there some reason to not ferment the leaves? Is the energy ...
5
votes
1answer
155 views

Are crypto currencies sustainable?

Except generating a different kind of "money value", what is the sustainable value of crypto currencies compared to the energy consumed to generate them? Compared to currencies working with ...
4
votes
2answers
723 views

How much energy costs do portable solar panels save in a house?

Our Houston area HOA does not allow roof top solar panels and I doubt they would survive our hurricanes too. I discovered NRG Energy sells these portable solar panels under their goal zero brand. If ...
3
votes
2answers
66 views

What is marginal energy?

I answered to a question and used the term "marginal energy". The answer wasn't understood by all, so I'm going to expand on the term to illustrate how it works. So, what is marginal energy?
3
votes
2answers
875 views

How much electric energy would a studio apartment use per month if everything inside is powered by electricity (heater, water, stove, etc.)

How much electric energy, on average, would a typical one-person studio apartment consume per month in the winter if everything inside is powered by electricity? Additional Information: Apartment ...
3
votes
2answers
137 views

Measure and compare energy consumption

does anyone know of a platform/forum where people measure and compare the energy consumption of their devices? I bought an energy metering plug, and now I can find out how much electricity my ...
2
votes
0answers
63 views

How effective are “GreenUp” (opt-in utility company green energy) programs? [duplicate]

My local Seattle utility offers a "Green Up!" program where customers can pay extra on each bill to buy energy from more renewable sources. I'm signed up to contribute at the highest level ($12/month),...
1
vote
1answer
65 views

How much energy does it take to store 1 Terabyte of data in the cloud?

Some time ago I saw a documentary/infotainment program on television where they said that on average storing 1TB of data in the cloud costs 41 kWh of electricity per year. There was no further ...