Abstract:
Die Erfindung betrifft einen Wärmeübertrager mit zumindest einem ersten Strömungskanal für das Durchleiten eines ersten Mediums und mit zumindest einem zweiten Strömungskanal zum. Durchleiten eines zweiten Mediums, insbesondere zum Verdampfen eines flüssigen Arbeitsmediums als erstes Medium und mit einem Fluid, wie Abgas oder Ladeluft, als zweites Medium, zur Übertragung von Wärme von dem zweiten Medium auf das erste Medium, wobei der zumindest eine erste Strömungskanal eine umlaufende erste Begrenzungs wandung aufweist und der zumindest eine zweite Strömungskanal eine umlaufende zweite Begrenzungswandung aufweist, wobei die ersten und die zweiten Strömungskanäle derart benachbart zueinander angeordnet sind, dass eine Doppelwandung zwischen den strömungsführenden Kanälen durch die erste und die zweite Begrenzungswandung gebildet ist.
Abstract:
A thermal transfer device comprising a thermal transfer surface and a passageway for conducting a thermal transfer fluid from an inlet to an outlet while passing in thermal contact with the thermal transfer surface. The passageway has at least two spiral passages and a connection channel connecting the at least two spiral passages to permit flow of the heat transfer fluid from a first spiral passage to a second spiral passage; thereby forming a path for the flow of the thermal fluid from the inlet, through the passageway, along the first spiral passage to the connection channel, then along the connection channel to the second spiral passage, and then to the outlet.
Abstract:
The invention relates to a plate heat exchanger for transferring heat between two phase-changing mass flows or between a phase-changing mass flow and a liquid mass flow, usually in conjunction with water or low-boiling liquids, e.g., seawater. The heat exchanger comprises several identical heat exchanger plates (4), which are arranged one behind the other and between which evaporator seals and condenser seals are inserted in alternation. The evaporator seals and condenser seals are compressed by end plates (1, 11) clamped by means of tie rods. The evaporator seals and the condenser seals are designed as frame profiled elements (12, 13) having a trapezoidal cross-section and/or the frame profiled elements (12, 13) are provided with several elongated, parallel openings, which together with the heat exchanger plates (4) form channels connected in series, which channels are used for flow through the evaporator chambers (2) and/or condenser chambers (3) in a multi-flow manner. High heat transfer coefficients can be achieved by means of the heat exchanger; the heat exchanger is corrosion-resistant, can be produced cheaply, and can be removed and cleaned without great effort.
Abstract:
The present invention relates to a method for exchanging heat between a effluent fluid (4) and a blood fluid and a heat exchanger (11) for heat exchange. The heat exchanger comprises a first and a second fluid circuit (19, 20) extending through the heat exchanger. The heat exchanger further comprises a stack of fluid plates (12, 13, 40) and a membrane (16) arranged between each of the fluid plates (12, 13, 40) where one interspace is formed between each fluid plate and membrane. The first and the second fluid circuit (19, 20) is each constituted by a passage extending through the fluid plates and membranes and along the fluid plates and membranes in at least two interspaces (17, 18). According to the method for heat exchanging an effluent fluid (4) is passed through the first fluid circuit (19) and a blood fluid is passed through the second fluid circuit (20) such that the effluent fluid (4) is passed along one side of a membrane (16) and simultaneously the blood fluid is passed along the other side of the membrane (16). Heat is thus exchanged between the effluent fluid (4) and the blood fluid over the membrane (16).
Abstract:
Heat exchangers can be utilised in thermo-acoustic engines to facilitate through acoustic oscillations electrical power generation via linear alternators and/or cooling effects. Provision of a heat exchanger arrangement (31) which can be associated with a traditional open flame stove utilised in third world countries would be advantageous. However, such heat exchanger arrangements must be lightweight and robust to withstand operational use. By creating a heat exchanger arrangement formed from plates having apertures which develop a folded conduit to act as a resonance tube of appropriate length it is possible to more easily accommodate thermo-acoustic electrical power generation and cooling effects in a traditional stove configuration.
Abstract:
Die Erfindung betrifft Wärmeübertrager-Vorrichtung für mit Wasserstoff betreibbare Kraftfahrzeuge mit zwei Fluidstrecken (16, 18) und zwei Wärmeübertragern (10, 12), die so verschaltet sind, dass ein entlang der ersten (16) dieser zwei Fluidstrecken (16, 18) strömendes erstes Medium nacheinander zunächst einen ersten (10) dieser zwei Wärmeübertrager (10, 12), anschließend den zweiten (12) dieser zwei Wärmeübertrager (10, 12) und anschließend wiederum den ersten Wärmeübertrager (10) durchströmt, und dass ein entlang der zweiten (18) dieser zwei Fluidstrecken (16, 18) strömendes zweites Medium den zweiten Wärmeübertrager (12) durchströmt, so dass im zweiten Wärmeübertrager (12) eine Wärmübertragung zwischen einem entlang der ersten Fluidstrecke (16) strömenden ersten Mediums und einem entlang der zweiten Fluidstrecke (18) strömenden zweiten Mediums ermöglicht wird und im ersten Wärmeübertrager (10) eine Wärmeübertragung zwisehen einem in einem ersten Bereich (20) der ersten Fluidstrecke (16) strömenden ersten Medium und einem in einem zweiten, vom ersten (20) beabstandeten zweiten Bereich (22) der ersten Fluidstrecke (16, 18) strömenden ersten Medium in diesem ersten Wärmeübertrager (10) ermöglicht.
Abstract:
A brazed plate heat exchanger (30) is provided for transferring heat between a first fluid (32) and a second fluid (34), with the first fluid (32) being pressurized to a relatively high pressure. The heat exchanger includes plate pairs (41), with each pair (41) defining a plurality of flow channels (56) forthe first fluid (32). Each of the flow channels (56) has a hydraulic diameter less than 1 mm. Reinforcements (62) are provided between each of the plate pairs (41) and are aligned with inlet and outlet openings (46, 48) to define inlet and outlet manifolds (50, 52) for the first fluid (32).
Abstract:
A flow directing insert for a reactor chamber in a reactor has a mainly square-shaped cross-section. The chamber has an inlet at one end of the chamber and an outlet at the other end of the chamber and at least one of the walls of the reactor chamber consists of a heat conductive material or of a membrane. The insert comprises a number of units arranged in rows, which units together with the walls of the chamber define a channel for a fluid. The channel extends from a first side of the chamber to a second side of the chamber and back again to the first side backwards and forwards a number of times. The units are arranged such that the fluid is forced to flow between the units in a serpentine path. A reactor comprises at least one reactor chamber containing a flow directing insert as described above.
Abstract:
A heat exchanger comprising heat delivery surfaces (1a) and flow channels (6, 7, 10, 11) with inlets and outlets (8, 9, 12, 13) for the primary and secondary flows. The heat delivery surfaces are formed into at least one heat transfer unit (1) consisting of corrugated plate components (1a) joined together tightly, in which there are connecting orifices (4, 5) for the primary flow, which orifices form two flow channels (6, 7) in the longitudinal direction of the heat exchanger for the primary flow; every second space between plates of the unit (1) comprising transverse flow channels (10) for the primary flow, and on the other hand, open spaces between plates next to said spaces between plates forming transverse flow channels (11) for the secondary flow; the heat transfer unit (1) being further surrounded by a casing (2) with an inlet (12) and an outlet (13) for the secondary flow, the casing being shut at its both ends by end plats (3), at least one of which has an inlet (8) and an outlet (9) for the primary flow.
Abstract:
The invention relates to a method for the manufacture of a plate heat exchanger/cooler (1), and to an arrangement for a plate heat exchanger/cooler produced by furnace brazing. When finished, this exhibits a number of passageways (2-7) communicating in parallel via collectors (8a) and intended for a fluid which is to be cooled. Each of the passageways (2-7) consists of a pair of plates (2a, 2b... 7a, 7b) facing one another. These have openings (2a2, 2b2... 7a2, 7b2) arranged on the short sides, which, in the finished heat exchanger/cooler, constitue the aforementioned collectors (8a). Spacer washers (10) which define slotted flow openings (1b) for a cooling medium are present between pairs of plates situated adjacent to one another. The spacer washers (10) and the plates (2a, 2b... 7a, 7b) and the pairs of plates are joined together at least along their outward-folded edges (2a1, 2b1... 7a1, 7b1) by a furnace brazing process. In each passageway (2-7), in an area on each short side, before the plates (2a, 2b... 7a, 7b) are brought into edge-to-edge contact with one another is placed a space washer (10) and a distance piece (11). The plates and spacer washers/distance pieces (10; 11) are caused by the furnace brazing process to form a solid body (12) on each short side of the heat exchanger/cooler (1). Before or after the furnace brazing process, through each such solid body (12) is made at least one transcurrent channel (9) for the installation of the heat exchanger/cooler (1).