Stack or Flue Effect

Sponsored Links

The stack or flue effect produced when outdoor temperature is lower than indoor temperature is due to the difference in weight of warm column air within the building and the cooler air outside.

The rate of air flow can be expressed as

Q = 9.4 A (h (t_r - t_o))^1/2         (1)

where

Q = rate of air flow (ft³/min)

A = free area of inlets and outlets - assumed equal (ft²)

h = height from inlets to outlets (ft)

t_r = average room temperature at height h (^oF)

t_o = outdoor temperature (^oF)

Sponsored Links

Related Topics

• Ventilation - Systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more

Related Documents

• Air Flow and Velocities due to Natural Draft - Air flow - volume and velocity - due to stack or flue effect caused by indoor hot and outdoor cold temperature difference