I think the most efficient way of heating water ought be an electric heater dipped in the water in a *very* well thermally insulated pot. Almost all inefficiencies play in our favor, the only possible losses would be some EM and phonon emissions, besides the thermal conductivity of the pot's walls. Even a microwave oven oughta waste more energy. Cheers, Isaac Em sex, 22 de mar de 2019 13:07, Bob Blick escreveu: > I think it depends on how you heat the water. Electric stoves run on 240 > volts, so if you put a tea kettle on the stove it's pretty much the same. > Electric tea kettles that plug into 120 volt outlets are a rarity here. I > mostly use a microwave if I'm making a cup of tea, and it does take a whi= le > to bring the water to a boil. > > Bob > > ________________________________________ > From: piclist-bounces@mit.edu on behalf of > James Cameron > Sent: Friday, March 22, 2019 3:04 AM > To: Microcontroller discussion list - Public. > Subject: Re: [OT] Solar Power > > On Thu, Mar 21, 2019 at 08:45:27PM +1300, RussellMc wrote: > > [...] > > http://www.inference.org.uk/sustainable/book/tex/sewtha.pdf > > A side issue. > > On the 63rd page, marked page 50, it is said that "In countries where > the voltage is 110 volts, it takes twice as long to make a pot of > tea." > > In UK, it is said that a 230V outlet permits up to 13A. So the > limit is 2.990kW. > > In Australia, a 240V outlet permits up to 10A. So the limit is 2.4kW. > > What does the US have as a conventional pluggable cable limit? > Wikipedia suggests 115V and 15A, or 1.725 kW for NEMA 1-15 or 5-15. > > So that is 58% of the UK tea power delivery. > > Or 1.73 times as long? > > -- > James Cameron > http://quozl.netrek.org/ > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .