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Gas kettle

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Bazyle06/09/2022 16:40:43
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6956 forum posts
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Is there a model engineer in the house? 6in dia firetube boiler only 2 in long, maybe 30 3/8in tubes. Silver soldered of course but no need to bother the club inspector, as a big fill/-emptu spout needed anyway. Like a kellie on steroids.

Whatever you choose remember to have a thermos ready for any excess.

not done it yet06/09/2022 19:45:31
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Posted by Bazyle on 06/09/2022 16:40:43:

Whatever you choose remember to have a thermos ready for any excess.

At home, one can pour in only the required amount of water. I do.

Robin Graham06/09/2022 22:47:44
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Posted by duncan webster on 05/09/2022 18:46:34:

Start again, this time in a text editor to keep it out of the evil clutches of the forum software.
NDIY's info is very useful. Assuming the electric kettle takes 110 seconds it uses 0.03 kWhr. To raise 290 cc of water from 20C to boiling takes 0.027 kWhr, so the elec kettle is ~90% efficient, about what you'd expect, you have to heat the kettle itself and it will lose a little to the outside world whilst it heats up. The gas kettle is 39% efficient, higher than I expected. As gas is so much cheaper than elec, I'd save 0.4p on every cup. I can get a stainless kettle for £14, so 3500 cups of tea. In our house that won't take too long, certainly less than 5 years. In winter the 'waste' heat won't be wasted anyway, it will heat the room. Look out Argos, I'm on my way. Just a pity I can't find the more efficient one at a sensible price.

Knowing my luck the latest PM will cut the link twixt gas and elec prices, after all nuclear and renewables shouldn't have gone up at all, so my financial wizardry will come crashing down.

Edited By duncan webster on 05/09/2022 18:48:57

This corresponds with my own observations/calculations. I was actually trying to prove my wife wrong when she insisted on buying a hob (gas) kettle to replace the electric one when it conked out. Gas turned out (measurement) to take ~0.24kWh to boil a litre of water, electric kettle (calculated assuming 90% efficiency) ~0.11 kWh. That gives an efficiency of ~42% for gas. So with gas about a quarter of the price of electricity, gas wins hands down.

Robin.

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