An ACHE consists of the following components
One or more bundles of heat transfer surface.
· An air-moving device, such as a fan, blower, or stack.
· Unless it is natural draft, a driver and power transmission to mechanically rotate the fan or blower.
· A plenum between the bundle or bundles and the air-moving device.
A support structure high enough to allow air to enter beneath the ACHE at a reasonable rate.
· Optional header and fan maintenance walkways with ladders to grade.
· Optional louvers for process outlet temperature control.
· Optional recirculation ducts and chambers for protection against freezing or solidification of high pour point fluids in cold weather.
· Optional variable pitch fan hub for temperature control and power savings