Abstract: The present invention refers to a plate heat exchanger (1) comprising a frame (2) with two end plates (3,4) and between them a package (5) of heat transfer plates (6) with intermediate gaskets, which delimit flow spaces for at least two heat transfer fluids, and a cover (8) extending round said package (5). The cover (8) abuts closely towards the end plates (3,4) and is arranged on distance from said package (5) so that a sealed space towards the surrounding atmosphere is created between the cover (8) and said package (5).

Abstract: A composite parallel plate heat exchanger is provided constructed of a plurality of composite plates disposed in a substantial parallel stacked relationship and spaced from each other by composite ribs inserted through and bonded between adjacent plates. The composite plates and ribs are specially constructed to maximize heat transfer between adjacent passageways formed by the plates and the fluids flowing in these passageways.

Abstract: A composite parallel plate heat exchanger is provided constructed of a plurality of composite plates disposed in a substantial parallel stacked relationship and spaced from each other by composite ribs inserted through and bonded between adjacent plates. The composite plates and ribs are specially constructed to maximize heat transfer between adjacent passageways formed by the plates and the fluids flowing in these passageways.

Abstract: Heat exchangers constructed of a plurality of composite ribbed sheets plates disposed and in a substantial parallel plate stacked relationship are disclosed. The sheets or plates can be spaced from each other by composite ribs or bars formed integral with or bonded to and between adjacent plates. The composite plates function as the fins of a conventional plate fin heat exchanger while the ribs form the passageways to separate adjacent fluids. The fins are specially constructed to maximize heat transfer between adjacent passageways formed by the ribs and the fluids flowing in these passageways.

Abstract: Heat exchangers machined form a thermally oriented block of composite material is provided. First and second arrays of fins can be machined into opposite sides of the block. Composite plates can be disposed over the machined fins to form passageways. The composite plates and fins are specially constructed to maximize heat transfer between adjacent passageways formed by the plates and the fluids flowing in these passageways.

Abstract: A device for the thermal regulation of a pressurized circulating fluid includes a plurality of elementary assemblies, each formed by a stack of ribbed or corrugated plates. Seals define fluid circulation circuits for conducting coolant fluid and heat transfer fluid therethrough, the circuits emerging at the top and the bottom of the device, heat being exchanged between the circuits through the plates. An electrical heating resistance element is interposed between the circuits for precise thermoregulation of the heat transfer fluid.

Abstract: A plate bundle for a heat exchanger, of the type comprising a stack of mutually parallel metal heat-exchange plates (10), each including smooth-surfaced edges and a corrugated central part (11) to form, with the associated heat-exchange plates (10), a double circuit for circulation of two independent fluids in counterflow. The plates (10) are connected to one another at their longitudinal edges by connection means (13) and comprise, a zone of heat transfer and exchange between the fluids and, at their free ends, a zone for inlet and outlet of the fluids. The fluid inlet and outlet zones are formed by the plane ends (10a) of the heat-exchange plates (10), between which independent plates (21) provided with reliefs for distributing the fluids in the heat-exchange zone are inserted.

Abstract: Prior art recuperators or heat exchangers have been restricted in use to only part speed and power application when adapted for use with high pressure gas turbine engine. The present recuperator or heat exchanger has been adapted for use with a high pressure ratio gas turbine engine. The recuperator includes a plurality of air cells being formed by a plurality of primary surface sheets. The primary surface sheets define a first surface and a second surface and has a plurality of corrugations formed therein. Each of the plurality of corrugations has a crest and a root extending from the respective first surface and second surface a preestablished axial distance. The preestablished axial distance from the crest to the first surface being unequal to that of the preestablished axial distance from the root to the second surface.