[TheForge] Foundry heat source

[Steve Smith]

This is certainly a good point Jim. There are two major reasons why gas 
forges don't run at 3600F:
1. Burner mixture (as Jim brings up) and mixing
2. Heat loss (poor insulation, heat goes up the chimney, etc.)
The flame temp in most gas forges is way above 2400, but 2400 is a good 
result if fairly uniform outside the flame.

Not arguing with you Jim, but I thought that heat loss deserved an 
honorable mention.

Steve


James Binnion wrote:
> How you burn it can make a huge difference in flame temperature. The  
> adiabatic flame temperature of propane and air combustion is 3,622 F  
> with both gasses at 77 degrees F and one atmosphere input pressure  one 
> atmosphere output pressure. Assuming a stoichiometric gas mixture  and 
> no excess air.   Typical gas forges struggle to get to 2400 F  more than 
> 1000 F lower in temperature!
> 
> The only way to get the max temperature is with laborotory type  
> precision, hard to do in the real world but gives you and idea of how  
> inefficient typical burners are.
> 
> Jim
> 
> 
> On Feb 10, 2007, at 2:33 PM, Craig Schaefer wrote:
> 
>> Seems to me that no matter which burner you use, propane will still  
>> burn at the same temperature.  It's all a question of how you're  
>> going to corral that heat and concentrate it, and how MUCH propane  
>> you're going to burn. The HF burners get damn hot and will easily  
>> power a forge or furnace designed to use them.
>>
>> CraigS
>> Gresham, OR
> 
> 
> James Binnion
> jbin at well.com
> 
> 
> 
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