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How Much Energy Do Gadgets Use 📱💻
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If you’re reading this then you’re using a gadget, but how much energy do our gadgets use? Are they efficient or inefficient? Is this something we should lose sleep over?
- Switching off your charger for one day is used up in 4 seconds of car-driving.
- The energy saved in switching off the charger for one year is equal to the energy in a single hot bath.
- Use a Kill a Watt or similar to test for yourself.
- Even a large TV may use 250W for 4h a day = 1 kWh per day.
- That’s less than 1% of European personal energy use.
Big factors are…
- Efficiency of the motor etc.
- Surface area (lower better).
- Bigger are fundamentally better.
- Thickness of insulation (thicker better).
- Temperature of the room (lower is better).
Discussion
- Long tail effect comes in here.
- Heating water on demand?
- BUT they use pure un-magnified electrical energy.
- You could be heating from carbohydrates (e.g. gas, biomass).
- Need to be situated close cause of dead water.
- Opening fridge door.
- Not too much of an issue if you do it briefly.
- The sensible heat of dry air is quite low.
- Look for “switched-mode” power supplies.
- Feel things to see if they are warm.
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