Abstract: A method is provided for manufacturing a manifold assembly with internal fluid communication between a first manifold defining a first fluid chamber and a second manifold defining a second fluid chamber of the manifold assembly, the first manifold and the second manifold joined in parallel relationship along a longitudinally extending interface between a wall of the first manifold and a wall of the second manifold. The method includes: forming a first access port in a wall of one of the first manifold and the second manifold diametrically opposite the interface; forming a first fluid communication port extending through a wall of the first manifold and a wall of the second manifold at the interface and defining a first fluid passage between the first and second fluid chambers; and sealingly plugging the access port.

Abstract: An air-cooled chiller system includes a heat exchanger including a first tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship; a second tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship, the second tube bank disposed behind the first tube bank with a leading edge of the second tube bank spaced from a trailing edge of the first tube bank; a fan creating an airflow across the first heat exchanger, the airflow flowing over the first tube bank prior to flowing over the second tube bank, wherein refrigerant flows in the heat exchanger in a cross-counterflow direction opposite that of the airflow direction.

Abstract: A water-cooled heat rejection heat exchanger is provided and includes a housing having first and second opposing end plates and sidewalls extending between the end plates to form an enclosure, at least the first end plate including first and second inlet/outlet pairs for first and second fluids, respectively, a plurality of plates disposed within the enclosure between the first and second end plates to define a first fluid pathway disposed in fluid communication with the first inlet/outlet pair and a second fluid pathway disposed in fluid communication with the second inlet/outlet pair and a plurality of brazed formations disposed between adjacent ones of the first end plate, the plurality of plates and the second end plate to isolate the first fluid pathway from the second fluid pathway.

Abstract: A multiple bank, flattened tube heat exchange unit includes a first tube bank including a plurality of flattened tube segments extending longitudinally in spaced parallel relationship between a first manifold and a second manifold and a second tube bank including a plurality of flattened tube segments extending longitudinally in spaced parallel relationship between a first manifold and a second manifold, the second tube bank disposed behind the first tube bank. The second manifold of the first tube bank and the second manifold of the second tube bank form a manifold assembly wherein an interior volume of the second manifold of the first tube bank and an interior volume of the second manifold of the second tube bank of the manifold assembly are internally connected in fluid communication.

Abstract: A multiple bank, flattened tube heat exchange unit includes a first tube bank including a plurality of flattened tube segments extending longitudinally in spaced parallel relationship between a first manifold and a second manifold and a second tube bank including a plurality of flattened tube segments extending longitudinally in spaced parallel relationship between a first manifold and a second manifold, the second tube bank disposed behind the first tube bank. The second manifold of the first tube bank and the second manifold of the second tube bank form a manifold assembly wherein an interior volume of the second manifold of the first tube bank and an interior volume of the second manifold of the second tube bank of the manifold assembly are internally connected in fluid communication.

Abstract: A method is provided for manufacturing a manifold assembly with internal fluid communication between a first manifold defining a first fluid chamber and a second manifold defining a second fluid chamber of the manifold assembly, the first manifold and the second manifold joined in parallel relationship along a longitudinally extending interface between a wall of the first manifold and a wall of the second manifold. The method includes: forming a first access port in a wall of one of the first manifold and the second manifold diametrically opposite the interface; forming a first fluid communication port extending through a wall of the first manifold and a wall of the second manifold at the interface and defining a first fluid passage between the first and second fluid chambers; and sealingly plugging the access port.

Abstract: An air-cooled chiller system includes a heat exchanger including a first tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship; a second tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship, the second tube bank disposed behind the first tube bank with a leading edge of the second tube bank spaced from a trailing edge of the first tube bank; a fan creating an airflow across the first heat exchanger, the airflow flowing over the first tube bank prior to flowing over the second tube bank, wherein refrigerant flows in the heat exchanger in a cross-counterflow direction opposite that of the airflow direction.

Abstract: A heat transfer system is disclosed that includes a heat transfer fluid circulation loop, and also a heat exchanger that includes an aluminum alloy exterior surface having thereon a top surface coat derived from a composition comprising a trivalent chromium salt and an alkali metal hexafluorozirconate.

Abstract: A multiple bank, flattened tube heat exchange unit includes a first tube bank including a plurality of flattened tube segments extending longitudinally in spaced parallel relationship between a first manifold and a second manifold and a second tube bank including a plurality of flattened tube segments extending longitudinally in spaced parallel relationship between a first manifold and a second manifold, the second tube bank disposed behind the first tube bank. The second manifold of the first tube bank and the second manifold of the second tube bank form a manifold assembly wherein an interior volume of the second manifold of the first tube bank and an interior volume of the second manifold of the second tube bank of the manifold assembly are internally connected in fluid communication.

Abstract: A multiple bank, flattened tube, finned heat exchanger includes a first tube bank including a plurality of flattened heat exchange tube segments extending longitudinally and arrayed in spaced parallel relationship between a first manifold and a second manifold and a second tube bank including a plurality of flattened tube segments extending longitudinally and arrayed in spaced parallel relationship between a first manifold and a second manifold, the second tube bank disposed in spaced relationship with and behind the first tube bank. A folded fin is disposed between each set of adjacent heat exchange tube segments of the first and second tube banks. Each folded fin extends between a respective set of adjacent heat exchange tube segments of both the first tube bank and the second tube bank, spanning the spacing gap between the tube banks. A plurality of fin notches protrude outwardly from each folded fin into the spacing gap.

Abstract: A multiple tube flattened heat exchange tube assembly includes a first flattened tube segment, a second flattened tube segment and a web member interconnecting the trailing edge of the first flattened tube segment and the leading edge of the second flattened tube segment. The web member may be provided with one or more retained water drainage openings. A multiple slab flattened tube heat exchanger is provided that includes a plurality of the multiple tube flattened heat exchange tube assemblies disposed in spaced parallel relationship. A method for fabricating a flattened tube finned heat exchanger having a first heat exchanger slab and a second heat exchanger slab is also disclosed.

Abstract: A multiple bank, flattened tube heat exchange unit includes a first tube bank including a plurality of flattened tube segments extending longitudinally in spaced parallel relationship and a second tube bank including a plurality of flattened tube segments extending longitudinally in spaced parallel relationship, the second tube bank disposed behind the first tube bank at a desired spacing gap. A first plurality of folded fins is disposed between respective adjacent pairs of the heat exchange tube segments of the first tube bank and a second plurality of folded fins disposed between respective adjacent pairs of the heat exchange tube segments of the second tube bank.

Abstract: A water-cooled heat rejection heat exchanger is provided and includes a housing having first and second opposing end plates and sidewalls extending between the end plates to form an enclosure, at least the first end plate including first and second inlet/outlet pairs for first and second fluids, respectively, a plurality of plates disposed within the enclosure between the first and second end plates to define a first fluid pathway disposed in fluid communication with the first inlet/outlet pair and a second fluid pathway disposed in fluid communication with the second inlet/outlet pair and a plurality of brazed formations disposed between adjacent ones of the first end plate, the plurality of plates and the second end plate to isolate the first fluid pathway from the second fluid pathway.

Abstract: A fluid-carrying tube for a heat exchanger includes an outer perimeter, an inner perimeter, and a plurality of ridges extending from the inner perimeter inwardly into an interior of the tube. Each ridge includes a ridge height, a base width and a tip width. A ratio of the ridge height to the base width is between about 0.2 and about 4.0, and a ratio of the tip width to the base width is between about 0.015 and about 0.965.