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Re: "Cobalt" stove for Heineken pot

Posted: Fri Jan 09, 2009 12:07 am
by zelph
HOZ, you have one with internal wick, hows it working?

Re: "Cobalt" stove for Heineken pot

Posted: Fri Jan 09, 2009 8:43 am
by hoz
I wasn't aware any had internal wicks. Which of the two kits you sent has it?

Re: "Cobalt" stove for Heineken pot

Posted: Fri Jan 09, 2009 11:25 am
by zelph
hoz wrote:I wasn't aware any had internal wicks. Which of the two kits you sent has it?
Oops!!!!

Oops56 got the one that's wickatized and one without.

Re: "Cobalt" stove for Heineken pot

Posted: Fri Jan 09, 2009 6:55 pm
by zelph
I did a test today with 32 degree water.

I boiled 2 cups with 3/4 ounce of HEET

Kitchen temperature wa 60 degrees.

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Re: "Cobalt" stove for Heineken pot

Posted: Sat Jan 10, 2009 6:52 pm
by zelph
Mark Hurd over at BPL did some calculations on the numbers of the last test using 32 degree water.

47.3 Kcals required / 82.25 Kcals used = 0.575 or about 58% efficient.

Re: "Cobalt" stove for Heineken pot

Posted: Sat Jan 10, 2009 9:30 pm
by Ridgerunner
zelph wrote:Mark Hurd over at BPL did some calculations on the numbers of the last test using 32 degree water.

47.3 Kcals required / 82.25 Kcals used = 0.575 or about 58% efficient.
I saw that. Very scientific. He has his mathmatical equations down. I saw where he said the most efficient alcohol stove was about 80% efficient. Any idea what stove that would be? Good job on your stove, Zelph. :mrgreen:

Re: "Cobalt" stove for Heineken pot

Posted: Sat Jan 10, 2009 9:54 pm
by zelph
Ridgerunner wrote:
zelph wrote:Mark Hurd over at BPL did some calculations on the numbers of the last test using 32 degree water.

47.3 Kcals required / 82.25 Kcals used = 0.575 or about 58% efficient.
I saw that. Very scientific. He has his mathmatical equations down. I saw where he said the most efficient alcohol stove was about 80% efficient. Any idea what stove that would be? Good job on your stove, Zelph. :mrgreen:
Thanks RR. Mark said he made an error when he said the 80% number. He came back and gave the name of the stove but I've forgotten what it was. A capillary something or other. I should have asked him if he made it or if he purchased one.

Those guys over there put stove testing to the highest level. This is me ( :idea: ) this is Mark, Tony and Roger ( :ugeek: ) They make it look so easy.

Re: "Cobalt" stove for Heineken pot

Posted: Sat Jan 10, 2009 10:52 pm
by DarenN
Ridgerunner wrote:
zelph wrote:Mark Hurd over at BPL did some calculations on the numbers of the last test using 32 degree water.

47.3 Kcals required / 82.25 Kcals used = 0.575 or about 58% efficient.
I saw that. Very scientific. He has his mathmatical equations down. I saw where he said the most efficient alcohol stove was about 80% efficient. Any idea what stove that would be? Good job on your stove, Zelph. :mrgreen:
i believe he was talking about the flat capilliary burner made from two discs with paper towel trapped between them.

Daren.......

Re: "Cobalt" stove for Heineken pot

Posted: Sun Jan 11, 2009 12:29 am
by Vibe
zelph wrote:I did a test today with 32 degree water.

I boiled 2 cups with 3/4 ounce of HEET

Kitchen temperature was 60 degrees.
You do know that your figures will be a bit skewed because it takes a certain amount of heat to convert 32° ice into 32°water before the water temp can then start to rise above 32°. Assuming that the water was close to pure.

Re: "Cobalt" stove for Heineken pot

Posted: Sun Jan 11, 2009 11:27 am
by zelph
Vibe wrote:
zelph wrote:I did a test today with 32 degree water.

I boiled 2 cups with 3/4 ounce of HEET

Kitchen temperature was 60 degrees.
You do know that your figures will be a bit skewed because it takes a certain amount of heat to convert 32° ice into 32°water before the water temp can then start to rise above 32°. Assuming that the water was close to pure.
It was water when I poured it into the pot. It had a few small bits of ice, not much. We'll have to take that into consideration and add 2 points higher on efficiency :D