Abstract: The invention relates to a plate heat exchanger (1) for a process engineering system (2), having a plurality of lamellae (3, 4) and a plurality of separating plates (5-7), which are arranged alternately, wherein at least one separating plate (6) has an optical waveguide (35) that is embedded in the at least one separating plate (6) in such a way that the optical waveguide (35) is covered on both sides by material of the at least one separating plate (6) in a first direction (R1) and in a second direction (R2), which are each oriented perpendicular to a plane (E) defined by the at least one separating plate (6) and in opposite senses with respect to one another.

Abstract: The invention relates to a method for determining the state of a heat exchanger device (10) that comprises means for transferring heat with the aid of at least one process stream. A thermohydraulic simulation of the at least one process stream through at least one passage (14) in the heat exchanger device (10) is carried out in order to determine temperature and/or heat transfer coefficient profiles of the means for transferring heat.

Abstract: Helically coiled heat exchanger for the indirect exchange of heat between a two-phase first medium and a second medium has a shell surrounding a shell space, which extends along a longitudinal axis, an inlet for the admission of the two-phase first medium into the shell space, a tube bundle arranged in the shell space and having multiple helically coiled tubes for accommodating the second medium and a separating device for separating a gaseous phase from a liquid phase. The separating device has a tray arranged above the tube bundle which serves for collecting the liquid phase. The tray has a plurality of chimneys for separating the two phases. Each chimney projects from the tray from a side of the tray facing away from the tube bundle and is covered by a roof. An opening in the tray between the roof and an upper end of the respective chimney, there is provided an inlet opening via which the gaseous phase can flow into the respective chimney.

Abstract: A heat exchanger, providing indirect heat transfer between a first fluid and at least one second fluid, comprises a jacket enclosing a jacket space for accommodating the first fluid and a tube bundle arranged in the jacket space and having a plurality of tubes for accommodating the at least one second fluid. The tubes form multiple tube layers. A shroud arranged in the jacket space encloses an outermost tube layer of the tube bundle. Spacers extending along the longitudinal axis are arranged between the shroud and the outermost tube layer. An interspace is present between any two spacers adjacent in the circumferential direction of the shroud, and between the shroud and the uppermost tube layer. A flow obstruction is arranged in the respective interspace and is designed to prevent or suppress a flow of the first fluid in the respective interspace, at least over a part section thereof.

Abstract: A heat exchanger for indirect heat exchange between a first and a second medium is provided with a shell space for receiving the first medium, and a tube bundle arranged in the shell space and for receiving the second medium. The tubes are helically wound in a number of tube layers onto a core tube. The tube bundle includes a first tube layer which is positioned further outward in the radial direction of the tube bundle from an adjacent second tube layer. The heat exchanger includes at least one spacer and the first tube bundle is supported against the second tube bundle via the at least one spacer. The at least one spacer has a flow-directing region designed to deflect part of the first medium flowing along a tube of the first tube layer in the direction of the second tube layer situated further inwards in the radical direction.

Abstract: A heat exchanger provides indirect heat transfer between a first fluid and at least one second fluid. The heat exchanger comprises a jacket which encloses a jacket space for accommodating the first fluid and a tube bundle arranged in the jacket space and having a plurality of tubes for accommodating the at least one second fluid, the tubes forming multiple tube layers, and a shroud arranged in the jacket space and encloses an outermost, tube layer of the tube bundle. Spacers extending along the longitudinal axis are arranged between the shroud and the outermost tube layer, an interspace is present between any two spacers adjacent in the circumferential direction of the shroud, and between the shroud and the uppermost tube layer. A flow obstruction is arranged in the respective interspace and is designed to prevent or suppress a flow of the first fluid in the respective interspace, at least over a part section thereof.

Abstract: The invention relates to a heat exchanger for indirect heat exchange between a first and a second medium, with a shell space for receiving the first medium, and a tube bundle arranged in the shell space and for receiving the second medium. The tubes are helically wound in a number of tube layers onto a core tube. At least one spacer is provided by means of which a first tube layer that is situated further outwards in the radical direction is supported on a neighbouring, second tube layer that is situated further inwards. The at least one spacer has a flow-directing region designed to deflect part of the first medium flowing along a tube of the first tube layer in the direction of the second tube layer situated further inwards in the radical direction.

Abstract: Helically coiled heat exchanger for the indirect exchange of heat between a two-phase first medium and a second medium comprises a shell surrounding a shell space, which extends along a longitudinal axis, an inlet for the admission of the two-phase first medium into the shell space, a tube bundle arranged in the shell space and having multiple helically coiled tubes for accommodating the second medium and a separating device for separating a gaseous phase from a liquid phase. The separating device has a tray arranged above the tube bundle which serves for collecting the liquid phase. The tray has a plurality of chimneys for separating the two phases. Each chimney projects from the tray from a side of the tray facing away from the tube bundle and is covered by a roof. An opening in the tray between the roof and an upper end of the respective chimney, there is provided an inlet opening via which the gaseous phase can flow into the respective chimney.

Abstract: The invention relates to a heat exchanger for indirect heat exchange between a first medium and a second medium, comprising a shell surrounding a shell space which extends along a longitudinal axis. The shell space serves for accommodating the first medium. A tube bundle is arranged in the shell space having multiple tubes for accommodating the second medium. The tubes are helically coiled in multiple tube layers onto a core tube. The tube bundle has a multiplicity of inner tube layers, surrounding the core tube, and a multiplicity of outer tube layers, surrounding the inner tube layers. The heat exchanger discharges a part of a gaseous phase out of the shell space from the region of the inner tube layers via a gas discharge device, and/or supplies a gaseous phase into the shell space in the region of the outer tube layers via a gas supply device.

Abstract: The invention relates to a heat exchanger system comprising a jacket extending along a longitudinal axis and surrounding a jacket space. A pipe bundle is arranged in the jacket space wherein pipes are wound helically around a central pipe. At least one pre-distributor container is arranged in the jacket space for accommodating and degassing a liquid-gas mixture and designed to coat a distributing means with liquid degassed in the at least one pre-distributor container. The distributing means is designed to deliver the liquid to the pipe bundle. At the top the jacket has an inlet which is aligned with the longitudinal axis and in fluid connection with the central pipe. The central pipe has at least one lateral opening so that the liquid-gas mixture can be fed via the inlet, the central pipe, and the at least one lateral opening into the at least one pre-distributor container.

Abstract: A helically coiled heat exchanger with a plurality of inlets each connected to at least one assigned tube defining a heating surface of the heat exchanger and having at least one changeover means to switch the inlet between a first operating state and a second operating state. In the first operating state, a stream of a first medium and, in the second operating state, a stream of a second medium is introduced via the inlet into the assigned tube. In the first operating state more heating surface is available to the stream of the first medium and correspondingly less heating surface is available to the stream of the second medium. In the second operating state more heating surface is available to the stream of the second medium and correspondingly less heating surface is available to the stream of the first medium.

Abstract: The invention relates to a method for determining the state of a heat exchanger device (10) that comprises means for transferring heat with the aid of at least one process stream. A thermohydraulic simulation of the at least one process stream through at least one passage (14) in the heat exchanger device (10) is carried out in order to determine temperature and/or heat transfer coefficient profiles of the means for transferring heat.

Abstract: The invention relates to a heat exchanger having a core tube onto which tubes forming a tube bundle are coiled, a pre-distributor having a liquid space for receiving a liquid phase (F), a centrally arranged feed for introducing the liquid phase into the liquid space and a main distributor which has a multiplicity of distributor arms for distributing the liquid phase (F) over the tube bundle, wherein the distributor arms via at least one flow path proceeding outside the core tube are in fluidic connection with the liquid space, wherein the core tube is arranged or sealed off with regard to the liquid space in such a way that the liquid phase from the liquid space is not introduceable via the core tube into the distributor arms of the main distributor.

Abstract: The invention relates to a heat exchanger for indirect heat exchange between a first medium and a second medium, comprising: a shell, which surrounds a shell space of the heat exchanger, a core tube, which extends along a longitudinal axis and onto which a plurality of tubes for receiving the first medium are coiled. The tubes form a bundle and a number of end portions of the tubes are brought together and connected to a tubesheet fixed on the shell. An annular channel is provided for receiving the second medium (M2). An inlet nozzle is provided for introducing the second medium into the annular channel (100). A plurality of distributor arms in flow connection with the annular channel are provided for distributions.

Abstract: A process for cooling a tube side stream in a main heat exchanger is described. The process comprises: a) supplying a first mass flow of a tube side stream to a first zone of individual tubes in the tube bundle; b) supplying a second mass flow of the tube side stream to a second zone of individual tubes in the tube bundle, the second zone being offset from the first zone; c) supplying a refrigerant stream on the shell side for cooling the first and second mass flows; d) removing the evaporated refrigerant stream from the warm end of the main heat exchanger; and, e) adjusting the first mass flow of the tube side stream relative to the second mass flow of the tube side stream to maximise the temperature of the removed evaporated refrigerant stream.

Abstract: The invention relates to a heat exchanger system (1) for heat exchange between at least a first medium (M), in particular in the form of a hydrocarbon-rich phase, and a second medium (K), with at least first and second pipe space sections (101, 103; 103, 105) for accommodating the first medium (M), and with a first pipe space section connecting means (102; 104), via which the two pipe space sections (101, 103; 103, 105) are connected to one another in a flow-guiding manner. The first pipe space section (101; 103) is surrounded by a first shell space (201, 203), and the second pipe space section (103; 105) is surrounded by a second shell space (203, 205) for accommodating the second medium (K). The first shell space (201; 203) is defined by a first shell (301; 303) and the second shell space (203; 205) is defined by a second shell (303; 305).

Abstract: A process for cooling a tube side stream in a main heat exchanger is described. The process comprises: a) supplying a first mass flow of a tube side stream to a first zone of individual tubes in the tube bundle; b) supplying a second mass flow of the tube side stream to a second zone of individual tubes in the tube bundle, the second zone being offset from the first zone; c) supplying a refrigerant stream on the shell side for cooling the first and second mass flows; d) removing the evaporated refrigerant stream from the warm end of the main heat exchanger; and, e) adjusting the first mass flow of the tube side stream relative to the second mass flow of the tube side stream to maximise the temperature of the removed evaporated refrigerant stream.

Abstract: The invention relates to a shell and tube heat exchanger (1) having a helical tube bundle (10) within a shell (20), that defines a shell space (200) surrounding the tube bundle (10). The tubes are helically coiled about a core pipe (100) in such a manner that there is formed at least one first section (11) and at least one second section (12), separate from the first section, that surrounds the first section (11). The two sections (11, 12) have in each case at least one associated inlet (E, E?) such that the two sections (11, 12) are able to be charged separately with the first medium.

Abstract: The invention relates to a heat exchanger (1) for indirect heat exchange comprising a tube bundle (10), formed from a plurality of tubes helically coiled around a core tube (100), for receiving a first medium, a shell (20). which encloses the tube bundle (10) and defines a shell space (200) surrounding the tube bundle (10), for receiving a second medium, and a liquid distributor (40) for distributing in the shell space (200) a stream (S), conveyed in the shell space (200), of the second medium in the form of a liquid (F). According to the invention a control device (33) for controlling distribution in the shell space (200) of an additional, further stream (S?) of liquid (F), and/or for controlling distribution of stream (S) of liquid (F) in the shell space (200).

Abstract: A heat exchanger for indirect heat transfer between a first medium and a second medium having a shell which has a shell space to accommodate a liquid phase of the first medium, and at least one heat-exchanger block having first heat-transfer passages to accommodate the first medium and second heat-transfer passages to accommodate the second medium, such that indirect heat can be transferred between the first medium and the second medium. The heat-exchanger block is arranged in the shell space so that it can be surrounded with a liquid phase of the first medium in the shell space. A plurality of cylindrical channels are provided in the shell space laterally to the heat-exchanger block and parallel to each other to conduct the liquid phase of the first medium.