Request for chimney draft calculation
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The chimney of a certain heating furnace is 30 m high; the average temperature of the smoke inside the chimney is 350°C, while the atmospheric temperature is 20°C. Therefore, the draft force in the chimney is approximately (95) Pa. Need a calculation?
Chimney draft = Chimney height * (Density of air - Density of smoke). Density = Acceleration due to gravity * Density. The density of air at 20°C is 1.205 kg/m3; what is the density of smoke? The calculation formula is as follows: S = H * { ρ1 * 9.8 * ( 273 / (273+t1) ) * b - ρ2 * 9.8 * ( 273/(273+t2) ) * b } Where S represents the chimney draft force ； H is the height of the chimney ； ρ1 and ρ2 are the densities of air and flue gas under standard conditions ； t1 is the outdoor air temperature ； t2 is the average temperature of the flue gas inside the chimney ； b is the local atmospheric pressure
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What is the structure of a chimney? I work on the construction of chimneys. Does anyone know how to calculate the required height and diameter of a chimney once the size of the boiler is known?