The present disclosure presents a heat exchange plate with slotted airfoil fins for a printed circuit heat exchanger. In the present disclosure, a herringbone streamlined slot is arranged on a fin so that a part of the heat exchange fluid can flow through a channel of the slot and flow out from the tail of the fin. In such a way, the perpendicular hitting on the fin can be prevented, thereby prevent forming of the stagnation area, mitigating phenomenon of substantial flow resistance in this area and, in turn, reducing the pressure drop of channel. Meanwhile, the slotted area could substantially increase the heat exchanging area and thus improve the heat exchanging performance.

An apparatus and methods are provided for finless heat exchanger cores. A heat exchanger core includes an inlet header and an outlet header. The heat exchanger core also includes one or more curved channel frames disposed at least partially between the inlet header and the outlet header. The one or more curved channel frames have a first end and a second end, and one or more fluid passageways that direct flow of a first fluid in a first direction therethrough from the first end to the second end. In some embodiments, at least one of the one or more curved channel frames includes a rounded leading edge and a tapered trailing edge.

A heat exchanger has first and second manifold portions and an array of substantially-parallel heat-transfer tubes extending between the first and second manifold portions. Each heat-transfer tube has an outer surface and an inner surface defining a conduit. In a cross-sectional view, the outer surface of each heat-transfer tube can form a first shape that is non-circular, and the inner surface of heat-transfer tube can form a second shape different than the first shape. Alternatively or additionally, at least one of the first shape and the second shape lacks reflectional symmetry in the cross-sectional view. Methods for fabricating such heat exchangers are also provided.

The present invention relates to a streamlined wavy fin for a finned tube heat exchanger, which comprises a fin body, an airflow inlet on one end of the fin body, an airflow outlet on the other end of the fin body, mounting holes for mounting tubes on the fin body, and several convex/concave ripples consecutively formed from the airflow inlet to the airflow outlet on the fin body in an orientation of an airflow streamlines. A connection line of the wave crests of the same one convex ripple and a connection line of the wave troughs of the same one concave ripple neighboring the same one convex ripple are both streamlines. The present invention efficiently suppresses the flow separation downstream the circular tubes, and obviously reduces the pressure loss of airflow. And at the same time, the surface areas of the fins are increased, heat transfer resistance on the fin side is decreased, the streamlined fluid flow makes that it is not easy to producing a recirculation flow downstream the circular tubes, and heat transfer performance of the fins at the rear part of the tube bank may be obviously improved, which has better fluid flow and heat transfer performances, the fins is not easy to accumulate dust in use, and stability of heat transfer performance is maintained.

The application relates to a vapor chamber for cooling a heat source, the vapor chamber includes an evaporator proceeding in a first plane and the vapor chamber includes at least a first condenser and a second condenser, wherein the first and second condenser are internally coupled to the evaporator, wherein the first condenser proceeds in a second plane, and the second condenser proceeds in a third plane, wherein the second plane and the third plane are arranged in an angle to the first plane, wherein at least one air fin is provided, wherein the at least one air fin proceeds in a fourth plane, and wherein the first condenser and the second condenser are internally coupled to the air fin, and wherein the evaporator, the first condenser, the second condenser and the air fin form a common internal volume.

A diffusion bonding heat exchanger includes a first heat transfer plate and a second heat transfer plate. A high-temperature flow path of the first heat transfer plate includes a connection channel portion configured such that a high-temperature fluid can flow across a plurality of channels within at least a range that overlaps a predetermined range in a stacking direction, the predetermined range being a range from a flow path inlet of the second heat transfer plate to a position downstream of the flow path inlet.

A heat exchanger includes a first layer, a second layer, and a third layer. The first layer includes a first width W.sub.1 extending in a first direction and a first length L.sub.1 extending in a second direction. The second layer includes a second length L.sub.2 extending in the first direction and a second width W.sub.2 extending in the second direction. The third layer includes a third width W.sub.3 extending in the first direction and a third length L.sub.3 extending in a second direction. The second layer is between the first layer and the third layer. The first length L.sub.1 of the first layer and the third length L.sub.3 of the third layer both extend further in the second direction than the second width W.sub.2 of the second layer. The first layer and the third layer include an overhang.

A counterflow heat exchanger configured to exchange thermal energy between a first fluid flow at a first pressure and a second fluid flow at a second pressure less than the first pressure includes a first fluid inlet, a first fluid outlet fluidly coupled to the first fluid inlet via a core section, a second fluid inlet, and a second fluid outlet fluidly coupled to the second fluid inlet via the core section. A heating arrangement is configured to heat the second fluid inlet to prevent ice ingestion via the second fluid inlet.

Methods and systems are provided for a cooling module assembly for a vehicle. In one example, the cooling module assembly includes a first set of fins arranged in a circle, configured to flow a first fluid through a first sinusoidal, continuous inner passage, and a second set of fins, also arranged in a circle and configured to flow a second fluid through a second sinusoidal, continuous inner passage. The second set of fins shares a common plane with the first set of fins and is arranged concentric about the first set of fins.

The present invention provides an economizer 70 including a plurality of cylindrical heat transfer tubes 71a-71d extending along a crossing direction crossing a flowing direction of combustion gas and disposed at a predetermined disposition interval P along the flowing direction, the combustion gas and fluid flowing in the plurality of heat transfer tubes performing heat exchange, and a swirl preventing section 75 disposed in contact with a downstream side outer circumferential surface 71Aa-71Ad in the flowing direction of each of the plurality of heat transfer tubes 71a-71d and configured to prevent a swirl of the combustion gas from occurring near the downstream side outer circumferential surface 71Aa-71Ad.