The present invention relates to a heat exchanger comprising: a burner for combusting a mixture of air and fuel; and a heat exchange unit in which heat is exchanged between combustion gas caused by the combustion of the burner and a heating medium, wherein the heat exchange unit includes a plurality of unit plates stacked on each other, and a sensible-heat exchange unit and a latent-heat exchange unit coaxially disposed around the burner are integrally formed with the unit plates.

A heat exchanger is provided. The heat exchanger provides a first plurality of tubes and a second plurality of flow passages which furcate near one of the first and second manifolds into two or more furcated flow passages and subsequently converge to exit the heat exchanger. The plurality of furcated flow passages are intertwined, reducing the distance between flow passages containing each fluid therebetween to improve thermal transfer. Further, the furcations create changes of direction of the fluid to re-establish new thermal boundary layers within the flow passages to further reduce resistance to thermal transfer.

A water heater includes an outer casing defining a longitudinal axis, an axial direction being defined as extending along the longitudinal axis. The water heater further includes a combustor for production of hot flue gases, a primary heat exchanger including a tube positioned within the outer casing, and a secondary heat exchanger including a plurality of plates coupled together by brazing to form a brazed plate heat exchanger. The secondary heat exchanger includes a first set of passages defined between the plates, and a second set of passages defined between the plates and alternating with the first set of passages in the axial direction. The primary and secondary heat exchangers are in fluid communication such that the flue gases flow through the second set of passages before being exhausted, and water to be heated flows through the first set of passages to a delivery point for use upon demand.

An apparatus includes a heat exchanger configured to be positioned around and coupled to a multi-axis gimbal. The heat exchanger includes an inlet configured to receive fluid containing heat generated by an equipment package carried by the gimbal. The heat exchanger also includes multiple heat rejection interfaces configured to reject the heat from the fluid into surrounding air in order to cool the fluid. The heat exchanger further includes an outlet configured to provide the cooled fluid from the heat exchanger. The heat rejection interfaces of the heat exchanger extend around the heat exchanger and are configured to reject the heat from the fluid regardless of a direction in which the gimbal is pointing the equipment package.

A heat exchanger includes an outer tube having a first axial end and a second axial end, and a pressure barrier tube positioned generally concentric to and within the outer tube such that a first flowpath is defined axially through at least a portion of the outer tube and radially between the outer tube and the pressure barrier tube. A second flowpath is defined within and at least partially axially through the pressure barrier tube. The heat exchanger also includes a first plurality of fins coupled to and extending between the outer tube and the pressure barrier tube, through the first flowpath, and a second plurality of fins coupled to and extending radially inward from the pressure barrier tube, through the second flowpath. A first fluid in the first flowpath exchanges heat with a second fluid in the second flowpath via heat transfer through the first plurality of fins, the pressure barrier tube, and the second plurality of fins.

A heat exchanger is provided. The heat exchanger provides a first plurality of tubes and a second plurality of flow passages which furcate near one of the first and second manifolds into two or more furcated flow passages and subsequently converge to exit the heat exchanger. The plurality of furcated flow passages are intertwined, reducing the distance between flow passages containing each fluid therebetween to improve thermal transfer. Further, the furcations create changes of direction of the fluid to re-establish new thermal boundary layers within the flow passages to further reduce resistance to thermal transfer.

A heat transfer plate (10) for a plate-and-shell heat exchanger (100), the heat transfer plate (10) includes a plate body (11) having first and second sides (111, 112) opposite to each other in a direction perpendicular to the plate body (11); and a projection (12) protruding from the plate body (11) in a direction from the first side (111) towards the second side (112), extending along a segment (115S) of a periphery (115) of the plate body (11), and having a first end (121) and a second end (122).

The invention relates to an exchanger arrangement (3) for the heat transfer and/or selective material transfer between a first fluid (F1) and a second fluid (F2), which can flow through the arrangement (3), said arrangement (2) being constituted of a multitude (n) of adjacent local exchanger elements (E.sub.1, E.sub.2, . . . , E.sub.n). The exchanger arrangement (3) has at least in some sections a cylindrical shape or the shape of a segment thereof or a prismatic shape having a polygonal base or the shape of a segment thereof. The adjacent local exchanger elements (E.sub.1, E.sub.2, . . . , E.sub.n) are flat structures that are either wedge-shaped or sheet-like.

The present invention relates to a plate heat exchanger formed of a plate stack of patterned heat transfer plates arranged on top of each other and positioned within a shell and defining a first flow path and a second flow path between the plates. Outer distribution chambers are formed in the space between the other edges of the heat transfer plates and the inside wall of the shell being in fluid communication to the first flow path and first port connections. The present invention introduces a baffle adjustable positioned in an outer distribution chamber separating it into two outer sub-chambers forming a flow barrier.

A heat exchanger is provided. The heat exchanger (40) provides a first plurality of tubes (50) and a second plurality of flow passages (52) which furcate near one of the first (42) and second (44) manifolds into two or more furcated flow passages and subsequently converge to exit the heat exchanger. The plurality of furcated flow passages are intertwined, reducing the distance between flow passages (50,52) containing each fluid therebetween to improve thermal transfer. Further, the furcations create changes of direction of the fluid to re-establish new thermal boundary layers within the flow passages to further reduce resistance to thermal transfer.