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Posted by Eric on May 23, 2008, 6:55 pm
> Typical...
> Ancient natural draft furnace, mid-efficiency, new induced draft or
> new high efficiency...
>
> Average...
> What's average to you is small to me.
The question is where I can read about such things. Basically, the
temperature and components of natural gas exhaust. I would expect such
reading matter to include discussions of the differences from different
appliances. Does anyone know of any online resource with this kind of
information?
This isn't about a particular appliance or application, nor is it for a
class. It's just that I'm curious to know what's in that exhaust gas, and
how hot it gets. Maybe I will get asked some such question when I'm on
"Who Wants to be a Millionaire" someday. If they ask me Benedict Arnold's
mother's maiden name, I already know that, and this is logically the next
question I should learn.
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Posted by over a barrel on July 25, 2008, 1:41 am
> If they ask me Benedict Arnold's
> mother's maiden name, I already know that, and this is logically the next
> question I should learn.
More important though IMO--when exactly did you finally stop beating your
wife ?
--
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Posted by Joseph on May 23, 2008, 6:57 pm
>
>>
>>> How hot depends on what kind of appliance. Same with the componant
>>> gasses(or portions thereof)
>>
>> Such as a typical furnace and/or water heater for an average sized house.
>
>
> Typical...
> Ancient natural draft furnace, mid-efficiency, new induced draft or new
> high efficiency...
>
> Average...
> What's average to you is small to me.
funny thing, with the variety of equip out there in the field right
now, I agree there really isn't a typical any more.
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Posted by Telstra on May 23, 2008, 8:29 pm
Natural GAS = 87% CH4 + O2 = CO2 + H2O + 13% CRAP = 39.5 MJ
> Is there a place online where I can read about the exhaust gas of a
> natural
> gas appliance? I want to know what it consists of, how hot it is, etc.
> This is just academic interest, and not any kind of harebrained scheme for
> everyone to start flaming me about.
>
> Does anyone know the rough details? Roughly how hot, and what are the
> major component gasses?
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Posted by SRN on May 24, 2008, 3:57 pm
> Is there a place online where I can read about the exhaust gas of a
> natural
> gas appliance? I want to know what it consists of, how hot it is, etc.
> This is just academic interest, and not any kind of harebrained scheme for
> everyone to start flaming me about.
>
> Does anyone know the rough details? Roughly how hot, and what are the
> major component gasses?
http://www.bacharach-training.com/combustionzone/perfectcombustion1.htm
http://www.duravent.com/docs/instruct/shbook.pdf
http://www.ventingpipe.com/helpCenter.cfm?page=HELP:topquestions#differences
Category I Appliance: Operates with neutral/negative vent static pressure,
flue gas temperature does not exceed 550 degrees, and conforms to NFPA 54 &
UL 441 (B Vent).
Category II Appliance: Operates with neutral/negative vent static pressure,
flue gas temperature is less than 140 degrees (F) above dew point
temperature. May cause excessive condensation and conforms to NFPA 211 and
UL 1738 (Corr/Guard).
Category III Appliance: Operates at a positive static vent pressure (at the
appliance) at a temperature that does not permit condensation. Conforms to
NFPA 211 and UL 103 (PIC, IPIC, PSW).
Category IV Appliance: Operates at a positive vent static pressure, flue gas
temperature is less than 140 degrees (F) above dew point temperature. May
cause excessive condensation and conforms to NFPA 211 and UL 1738
(Corr/Guard).
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