Heating furnace: switched to natural ventilation, with negative pressure inside the furnace as well
Thread Content
What is the principle behind changing a heating furnace to natural ventilation while maintaining negative pressure inside the furnace?
Even natural convection relies on the principle of density difference: heated air has a lower density than the air surrounding it, so it rises while the surrounding air fills in its place. Just like a chimney, it creates natural suction.
Air movement is achieved by taking advantage of the difference in density; heated air has a lower density than the air surrounding it, so it rises upward, and the surrounding air fills in its place. Similar to a chimney, this creates a natural draft force.
Utilize the draft from the chimney, the density difference of hot and cold fluids. Negative pressure is related to the chimney height and the temperature difference between the convection section and the flue gas temperature