Integrated Fan Drive System For Air-Cooled Heat Exchangers (ACHE)

An induced-draft, air-cooled heat exchanger for cooling high-temperature process fluids used in an industrial process, comprising:

• a main support structure that supports the induced 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 above the tube bundle;
• a fan assembly positioned above the plenum, the fan assembly comprising a plurality of fan blades and a fan shaft, wherein the fan shaft extends downward through the plenum and tube bundle, wherein rotation of the fan induces an air-flow through the tube bundle;
• and
• a fan drive system supported by the main support structure and positioned beneath the tube bundle, 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 shaft.

An induced-draft, air-cooled heat exchanger for cooling high-temperature process fluids used in an industrial process, comprising:

• a main support structure that supports the induced 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 above the tube bundle;
• a fan drive system supported by plenum and positioned above the tube bundle, the fan drive system comprising a permanent magnet motor comprising a motor casing, a stator and a rotatable shaft;
• and
• a fan assembly positioned above the tube bundle, the fan assembly comprising a plurality of fan blades, wherein the rotatable shaft of the motor is connected to the fan and wherein rotation of the fan induces an air-flow through the tube bundle.