Re: Brown's gas??

Leo Lichtman wrote:

"Tim Wescott" wrote: (clip) That may be the one (partially) true claim, actually.

Hydrogen remains largely transparent as it burns, so it emits very little light. (clip)

^^^^^^^^^^^^^^^
Tim, only if you DEFINE temperature in terms of radiant emission can you cling to that statement. Are you aware of the deaths that have occurred at the Indy Speedway because alcohol flames are not visible in daylight? If a torch truly produced a low temperature flame, it wouldn't be worth s**t for welding. It isn't necessary to heat some other surface in order to have heat. One of the laws of thermodynamics is that heat ALWAYS flows from a higher temperature to a lower temperature. If the flame were really cool, it COULD NOT HEAT ANYTHING TO A HIGHER TEMPERATURE.


They were specifically talking about "radiant temperature". Assuming that means the temperature you read with an IR radiometer then it could indeed be low, depending on your technique and the radiometer.

You clipped out the part where I was saying that I wouldn't stick my hand in the flame -- having gone through more than one bottle of isopropyl alcohol to fuel a bullet-making and general solder-casting operation in my bedroom when I was 13 I can attest to the heat of an "invisible" flame.

I'm just lucky I didn't burn the house down -- particularly since my dad was assistant chief of the fire department _and_ on the board of directors.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
.

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