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Larry Larry is offline
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First recorded activity by BoatBanter: Jul 2006
Posts: 5,275
Default Kettle to boil water

wrote in
:

Yesterday, I made tests and learned that my home GE electric kettle
boiled a 1 quart of water in four minutes and 30 secs.



To compare the load:

That pot probably draws 1500 watts divided by 13V = 115A x 4.5 mins = 8.6
AH off the battery capacity to boil 32 oz, 2 pots in the Hot Shot.

1.45 x 2 pots is 2.9 AH compared to 8.6 AH. I think the disparity is the
very low thermal mass of the Hot Shot's boiler, directly coupled to its
fast heating element outside the boiler under it. The boiler is very thin
aluminum with automatic shutoff thermostat. (You reset the thermostat to
boil the next load.) The kettle, on the other hand, probably has an
internal calrod metal beast to heat up along with all that exposed metal of
the kettle itself before the water's going to boil, a much bigger thermal
load.

The Hot Shot's boiler is also insulated by the plastic case around it.
It'll keep water at near boiling temperature a long time after it shuts
down.

Our rec.boats.cruising thermal engineers will be working on this problem,
day and night....(c;

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