What is Net stack temperature?
Click to see full answer
Subsequently, one may also ask, what is stack temperature?
Stack Losses: Stack temperature is a measure of the heat carried away by dry flue gases and the moisture loss. 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.
One may also ask, what is the temperature of flue gas? The typical furnace outlet temperature of flue gases is usually around 1200 °C which will decreases gradually along the pathway of heat transfer, while the temperature of the flue gases going to stack is around 150 °C.
Beside above, what could be the cause of a high stack temperature?
The most common cause of high stack temperatures is running with too much excess air. Not only will lowering the excess air reduce the stack temperature there will also be an increase in heat transfer in the radiant section of the furnace.
What is stack loss?
Stack losses typically are the largest single energy loss in boiler operations and involve both excess air and stack temperatures. The amount of heat lost will depend on the temperature and volume of gas leaving the boiler. Boiler efficiency is highly dependent on the excess air rate.