Patent ID: 8629640

Claim:
A forced-draft, air-cooled heat exchanger for cooling process fluids used in an industrial process, comprising: a main support structure that supports the forced draft, air-cooled heat exchanger at a sufficient elevation above grade; a tube bundle supported by the main support structure, the tube bundle configured to receive process fluids used in an industrial process; a plenum connected to the main support structure and positioned beneath the tube bundle, the plenum being configured to direct air-flow through the tube bundle; a fan assembly supported by the main support structure and positioned beneath the plenum, the fan assembly having a plurality of fan blades, wherein rotation of the fan produces an air-flow that is directed through the tube bundle by the plenum; and a fan drive system supported by the main support structure and positioned beneath the fan assembly, the fan drive system comprising a permanent magnet motor comprising a motor casing, a stator and a rotatable shaft, the rotatable shaft being connected to the fan.