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B&Q Stops Selling Patio-Heaters = More Tea

B&Q to stop selling patio heaters

Definitely sounds like a good move, but it is interesting to note:

The Energy Saving Trust has estimated that a propane patio heater with a heat output of 12.5kW will produce around 34.9kg of CO2 before the fuel runs out (after approximately 13 hours). This is equivalent to the energy required to produce approximately 5,200 cups of tea (or 400 cups for every hour of operation)


Hmmm, keep warm outside for 13 hours or have 5,200 cups of tea? I think I know which one I choose...

Comments

( 6 comments — Leave a comment )
cartesiandaemon
23rd Jan, 2008 13:53 (UTC)
And conveniently, drinking tea *might* keep you warm. At least a bit.
hmmm_tea
23rd Jan, 2008 14:49 (UTC)
Yes, but also, I can use a cup of tea indoors.
wellinghall
23rd Jan, 2008 13:56 (UTC)
But only if it was good tea.
feanelwa
23rd Jan, 2008 16:40 (UTC)
I wonder how many nice hot baths that is.
hmmm_tea
23rd Jan, 2008 18:38 (UTC)
5,200 (uk) cups is approx 1,200 litres of water at 100C (assuming the teabags/leaves haven't been added of course, otherwise it would be a bit of a weird bath)

google seems to suggest around 200 litres at around 35C as a good average quantity/temperature for bath water.

So if the mains cold water was at around 15C, we'd want around
1200*c*(100-35)/c*(35-15)=3900 litres
(comparing heat transfer between the two bodies of water and assuming neglible difference in density and heat loss to the surrounding, etc, etc)

Therefore approx 5,100 litres in total or 25.5 baths.
feanelwa
23rd Jan, 2008 18:40 (UTC)
I love it when other people have the energy to figure these things out so I don't have to. You have earned a nice warm bath, have one of mine.
( 6 comments — Leave a comment )

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