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A novel way for a hot cuppa - Page 2

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Posted by SJC on September 23, 2006, 1:42 pm
 
I had a 12" x 4 foot concentrating trough that took a 1/2" x 4 foot copper
tube with frozen water from ice to steam in 20 minutes in 30F air temp.
The temperature would rise at 10F per minute and slow as the temperature
increased and more heat was lost to the surounding cold air. The copper
tube was inside a glass tube. When I pulled a vacuum inside the glass tube
it did even better.

Wow, that is fast!

teraniageoff wrote:


Posted by teraniageoff on September 24, 2006, 8:19 am
 


Hi All,
That 3 minutes is 10am to 2pm and clear skys! But I havent shrouded the
pot with a durablanket cosy yet.
Because a parabolic dish concentrates to a point it can be captured
through a pinhole in an insulating shroud, or hit the bottom of a coffe
pot accurately.
Troughs reradiate well to space and this is why they have ERoEI of 20
while dishes are 30.
At this concentration, all metwalorking including smelting iron can be
achieved.
Aluminium might be a bit trickier, from bauxite but from cans is easy.

Did you know dishes reradiate to space at night and drop the focus to
10degc below ambient?.Fascinating.

regards
geoff






Posted by SJC on September 24, 2006, 1:55 pm
 I mentioned the trough just as a point of reference on heating speed.
I did not expect anyone to pour their coffee into a copper trough tube :)



Hi All,
That 3 minutes is 10am to 2pm and clear skys! But I havent shrouded the
pot with a durablanket cosy yet.
Because a parabolic dish concentrates to a point it can be captured
through a pinhole in an insulating shroud, or hit the bottom of a coffe
pot accurately.
Troughs reradiate well to space and this is why they have ERoEI of 20
while dishes are 30.
At this concentration, all metwalorking including smelting iron can be
achieved.
Aluminium might be a bit trickier, from bauxite but from cans is easy.

Did you know dishes reradiate to space at night and drop the focus to
10degc below ambient?.Fascinating.

regards
geoff






Posted by Philip Lewis on September 25, 2006, 4:02 pm
 
I suppose a copper trough isn't a proper pot.
(see:
http://www.themadmusicarchive.com/song_details.aspx?SongID 180)

:)

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