Abstract:
Method for controlling a device (1) that comprises at least a compressor installation (2) and/or drying device on the one part, and a heat recovery system (3) on the other part, whereby the heat recovery system (3) absorbs heat from the compressor installation (2), and whereby the composite device (1) further comprises a controller (5) and means (6) for determining one or more system parameters, characterised in that the controller (5) controls both the compressor installation (2) and/or the drying device and the heat recovery system (3) on the basis of the aforementioned system parameters, such that the overall efficiency of the device is optimised.
Abstract:
L'invention concerne un dispositif de refroidissement du moteur thermique (10), de composants électriques (26, 14, 28) et des moyens de stockage d'énergie électrique (18) d'un véhicule hybride, ledit dispositif comprenant un premier circuit (60, HT) pour le refroidissement du moteur thermique, un deuxième circuit (BT) pour le refroidissement des composants électriques et un troisième circuit (78, TBT) pour le refroidissement des moyens de stockage d'énergie électrique, un fluide caloporteur pouvant circuler dans lesdits circuits lesquels comportent des moyens d'échange thermique (46, 48, 52). Selon l'invention, les moyens d'échange thermique sont constitués par un échangeur thermique (88) séparés en trois parties et le dispositif comporte des moyens de mise en communication du premier circuit avec le troisième circuit, les moyens étant actionnés en fonction de la température du fluide caloporteur et en fonction du débit du fluide caloporteur dans le premier circuit. L'invention concerne aussi un radiateur pour véhicule hybride.
Abstract:
A method for controlling a flow of refrigerant to an evaporator arranged in a vapour compression system is disclosed. The vapour compression system comprises the evaporator, a compressor, a condenser, and an expansion device arranged in a refrigerant flow path. The evaporator comprises at least two evaporator tubes arranged fluidly in parallel, and a header being fluidIy connected between the expansion device and the evaporator tubes. The method comprises the steps of alternatingly allowing and preventing a flow of mixed phase refrigerant into the header. The step of allowing a flow of mixed phase refrigerant into the header is performed in such a manner that a pressure level in the header is increased significantly and abruptly. Thereby the liquid part and the gaseous part of the mixed phase refrigerant are distributed substantially homogeneously in the header. Thereby the liquid part of the refrigerant is distributed in a substantially uniform manner among the evaporator tubes, and the same filling degree is obtained in the tubes. The potential refrigeration capacity of the evaporator can be utilised to a greater extent without risking that liquid refrigerant passes the evaporator.
Abstract:
Cooling apparatus providing two independent heat exchangers (18, 20) serially arranged with respect to a heat flow (42), each heat exchanger being connected to a respective independent chiller (32, 34). The apparatus incorporates an element of redundancy in order to effect an increase in operational efficiency, by being switchable between a first operation mode in which both chillers operate in a free cooling mode and a second operation mode in which a first chiller operates in a free cooling mode and a second chiller operates in a forced cooling mode.
Abstract:
A mandrel (50) for forming helically coiled heat exchange tubes (80), the mandrel comprising: a roller (56) to form the tube into a helical coil (30); a drive (52) for rotating the roller; a carriage (82) for indexing the tube with respect to the roller, wherein the roller comprises a plurality of winding beams (60), which beams are arranged to be radially movable by associated powered adjustable supports (62) so as to permit rapid setting of the radius of a heat exchange coil formed on the roller.
Abstract:
A by-pass conduit for a stacked plate heat exchanger. The by-pass conduit comprises first and second plate members that each comprise a substantially planar central portion surrounded by an offset peripheral flange, the peripheral flanges of the first and second plates being sealably joined together and the planar central portions of the first and second plates being in spaced opposition to define a bypass channel. A flow restricting structure provides a fluid restricting barrier in the bypass channel, the flow restricting structure defining a calibrated by-pass passage that regulates the flow of fluid through the bypass channel.
Abstract:
Die Erfindung betrifft eine einfache Bauweise für hydropneumatische Systeme, welche dreidimensionale Verbindungen von Wärmetauschern, Pumpen und Mess- und Regelelementen enthalten, wobei das dreidimensionale System in ein System zweidimensionaler überlagerter Elemente aufgeteilt wird, wo Verbindungen innerhalb der Ebenen durch Kanäle und Verbindungen zwischen den Ebenen durch Öffnungen in den Ebenen selbst hergestellt werden und diese Ebenen zusätzliche zweidimensionale Bauteile enthalten, bestehend aus Trennplatten (T) aus gut wärmeleitfähigem Material, Isolierplatten (I) aus schlecht wärmeleitfähigem Material, Formplatten (F), Regelungsplatten mit beweglichen Teilen und Sonderplatten (S), die dicht und flächig aufeinander gefugt zu einem Block verbunden werden, wobei jede Formplatte (F) zwischen Trennplatten (T) oder Isolierplatten (I) liegt, sich in den Formplatten (F) ausgeschnittene Kanäle befinden, welche Medien innerhalb der Plattenebene leiten, wobei Kanäle benachbarter Formplatten miteinander weitgehend korrespondieren, um optimalen Wärmeübergang zu ermöglichen, und sich in allen Platten Löcher befinden, wodurch Verbindungswege zwischen Kanälen unterschiedlicher Formplatten hergestellt werden, die nicht benachbart sind.
Abstract:
A nuclear reactor (1) cooled with pressurized water, having a pressurized tank (2) installed in which are compact steam generators (11); each steam generator (11) comprises a plurality of heat-exchange tubes (21) having respective spiral portions (37) set in levels on top of one another to form at least one annular tube bundle (20) delimiting a substantially cylindrical internal central zone (22), pre-arranged for supply from above with primary water, which then traverses the tube bundle radially.
Abstract:
A short-circuit-proof heat-exchanger with helical baffles, includes a shell (1), helical baffles (4) provided inside the shell (1) and heat-exchanging tubes (5) throughout the helical baffles (4). Each helical baffle (4) has a 360°/4 quadrant-shaped projection. Both straight sides of the helical baffles (4) are widened and overlapped one by one. The heat-exchanging tubes (5) penetrate the widened and overlapped sections. The heat-exchanger further includes a plurality of tie rods (2), one of which is located at the central axis of the shell (1) and penetrates the widened and overlapped sections of the helical baffles (4), the othersof which penetrate the end portions of the central lines of the widened and overlapped sections' projections. The tie rods (2) are fixed on the inner surface of a tube sheet (7) on one end, and are fixed on the corresponding distal helical baffle (4) on the other end. Spacing tubes (3) are divided into several segments and are provided on the tie rods (2).
Abstract:
Die Erfindung betrifft einen Wärmetauscher, insbesondere für ein Kraftfahrzeug, umfassend ein Gehäuse (2) mit einem Anschluss (4) für den Einlass oder Auslass eines erstes Fluids, wobei das Gehäuse (2) von dem ersten Fluid durchströmbar ist und wobei in dem Gehäuse (2) Tauschermittel (11 ) zur Durchströmung mit einem zweiten Fluid angeordnet sind, wobei das erste Fluid ein Regelglied (7) durchströmt, mittels dessen die Strömung des ersten Fluids veränderbar ist, wobei der Anschluss (4) eine Ausformung (6) zur Halterung des Regelglieds (7) aufweist.