EEVblog > News/Suggestions/Help

Dave, seen this? Grid overvoltage story in the Guardian

(1/6) > >>

Mr Purple:
https://www.theguardian.com/australia-news/2024/oct/19/could-australias-outdated-voltage-standards-be-taking-years-off-the-life-of-your-toaster

tszaboo:
I wonder what appliance uses less energy with less voltage? SMPS will have higher efficiency. Space and water heaters will use the same, because they need to be on for longer to heat up. Motors will rotate at the same speed, and their consumption is mostly dependent on the load.

mikeselectricstuff:
As mentioned above, a large proportion of loads will draw about the same total energy over a range of voltage, but at lower voltages, transmission losses will be higher, so I wonder if that would offset any gains from those appliances that draw less at lower voltages.

tooki:

--- Quote from: tszaboo on October 19, 2024, 08:41:04 am ---I wonder what appliance uses less energy with less voltage?

--- End quote ---
Incandescent light bulbs I guess?

OK, in fairness, old gadgets with linear regulated power supplies would burn off more waste energy as heat with higher input voltages.

mikeselectricstuff:

--- Quote from: tooki on October 19, 2024, 11:09:07 am ---
--- Quote from: tszaboo on October 19, 2024, 08:41:04 am ---I wonder what appliance uses less energy with less voltage?

--- End quote ---
Incandescent light bulbs I guess?

OK, in fairness, old gadgets with linear regulated power supplies would burn off more waste energy as heat with higher input voltages.

--- End quote ---
LED bulbs with capacitive droppers, vacuum cleaners, some motors in washing machines, ceiling fans, aircons & heaters that are run full blast so the thermostat never kicks in.

Navigation

[0] Message Index

[#] Next page