Heat Exchanger and Header for the Same

A heat exchanger comprising:

• a first plurality of flat tubes to convey a first fluid through the heat exchanger;
• a second plurality of flat tubes to convey a second fluid through the heat exchanger;
• a first header arranged at an end of the heat exchanger, the first header including a first cylindrical fluid manifold having a plurality of tube slots extending through a first arcuate wall section of the first header, a second cylindrical fluid manifold extending parallel and adjacent to the first cylindrical fluid manifold having a plurality of tube slots extending through a second arcuate wall section of the first header, and a thickened wall section bounded by the first cylindrical fluid manifold, the second cylindrical fluid manifold, and a planar outer surface of the first header, the thickened wall section having a generally triangular cross-section;
• and
• a second header arranged at an opposing end of the heat exchanger, the second header including a third cylindrical fluid manifold having a plurality of tube slots extending through a first arcuate wall section of the second header, a fourth cylindrical fluid manifold extending parallel and adjacent to the third cylindrical fluid manifold having a plurality of tube slots extending through a second arcuate wall section of the second header, and a thickened wall section bounded by the third cylindrical fluid manifold, the fourth cylindrical fluid manifold, and a planar outer surface of the second header, the thickened wall section having a generally triangular cross-section;
• wherein tube ends of the first plurality of tubes are received through the tube slots extending through the first arcuate wall sections of both the first and second header, and wherein tube ends of the second plurality of flat tubes are received through the second arcuate wall sections of both the first and second headers.