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Posted by zero on August 8, 2006, 10:03 pm
On 8 Aug 2006 15:50:39 -0700, guskz@hotmail.com wrote:
>Condensation is needed for high efficiency boilers and it only occurs
>if the flue gas temperature is below 120deg F, so to lower the
>temperature they bring in cold winter air (which obviously defeats any
>heat savings) when the boiler is running extra hot in winter.
>READ BELOW.
>(*****the lower the stack temperature the more effictive the heat
>exchange.....****)
>QUOTE:
>"Stack Losses:
>Stack temperature is a measure
>of the heat carried away by dry flue gases and the
>moisture loss. It is a good indicator of boiler
>efficiency. The stack temperature is the
>temperature of the combustion gases (dry and
>water vapor) leaving the boiler and reflects the
>energy that did not transfer from the fuel to the
>steam or hot water. The lower the stack
>temperature, the more effective the heat
>exchanger design, and the higher the
>fuel-to-steam efficiency."
Ya know, I never looked at it like that.
Nice work! Congratulations!
-zero
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>if the flue gas temperature is below 120deg F, so to lower the
>temperature they bring in cold winter air (which obviously defeats any
>heat savings) when the boiler is running extra hot in winter.
>READ BELOW.
>(*****the lower the stack temperature the more effictive the heat
>exchange.....****)
>QUOTE:
>"Stack Losses:
>Stack temperature is a measure
>of the heat carried away by dry flue gases and the
>moisture loss. It is a good indicator of boiler
>efficiency. The stack temperature is the
>temperature of the combustion gases (dry and
>water vapor) leaving the boiler and reflects the
>energy that did not transfer from the fuel to the
>steam or hot water. The lower the stack
>temperature, the more effective the heat
>exchanger design, and the higher the
>fuel-to-steam efficiency."