Additively manufactured heat exchanger

A method of manufacturing a heat exchanger, the method comprising:

• depositing a layer of additive material on a bed of an additive manufacturing machine;
• and
• selectively directing energy from an energy source onto the layer of additive material to fuse a portion of the additive material and form a heat exchanger defining a vertical direction, a lateral direction, and a transverse direction, the vertical, lateral, and transverse directions being mutually perpendicular to each other, the heat exchanger comprising:
• a housing defining a heat exchange plenum having a first fluid inlet and a first fluid outlet separated along the transverse direction;
• a plurality of heat exchange banks passing through the heat exchange plenum between a top side and a bottom side of the housing substantially along the vertical direction, each of the heat exchange banks comprising a plurality of heat exchange tubes;
• at least one collector manifold providing fluid communication between adjacent heat exchange banks;
• an inlet manifold defining an inlet plenum in direct fluid communication with a first heat exchange bank;
• and
• an outlet manifold defining an outlet plenum in direct fluid communication with a last heat exchange bank.

A heat exchanger comprising:

• a housing defining a heat exchange plenum extending substantially along a first direction;
• a plurality of heat exchange banks positioned within the heat exchanger plenum and extending between a first end and a second end substantially along a second direction, each of the heat exchange banks comprising a plurality of heat exchange tubes;
• and
• a plurality of collector manifolds positioned at the first end and the second end of the heat exchange banks, each collector manifold defining one or more connecting ports providing fluid communication between adjacent heat exchange banks, the connecting ports being at least partially defined by a plurality of stiffening ribs extending substantially along the second direction.