Abstract: Provided is a connection element comprising a tubular first part with a first ring-shaped connection face for connection with a highly heat resistant steel pipe and a tubular second part with a second ring-shaped connection face for connection with a first ferritic steel pipe; wherein the first part is of a corrosion resistant steel material and wherein the second part is of a ferritic steel material; wherein the first and second parts are in one-piece and formed such that a passage between the first and second ring-shaped connection faces is formed; and wherein the first and second parts are produced by an additive manufacturing process. Further provided are a pipe arrangement and a heat exchanger.

Abstract: A transition component for connecting components of a chemical or process engineering plant, wherein the transition component has a first material piece made from a first material and second material piece made from a second material, wherein the first material and the second material cannot be connected to each other by fusion welding, the first material piece and the second material piece forming a hollow body, the transition component having a radially interior inner side and a radially exterior outer side, the first material piece being connected to the second material piece by at least one intermediate material layer and the transition component having at least one insulation layer, wherein the insulation layer extends at least in part over the inner side and/or the outer side of the transition component, and a core-in-shell heat exchanger and a cold box having the transition component.

Abstract: A method for operating a heat exchanger, in which a first operating mode is carried out in first time periods, and a second operating mode is carried out in second time periods that alternate with the first time periods; in the first operating mode a first fluid flow is formed at a first temperature, is fed into the heat exchanger in a first region at the first temperature, and is partially or completely cooled in the heat exchanger; in the first operating mode a second fluid flow is formed at a second temperature, is fed into the heat exchanger in a second region at the second temperature, and is partially or completely heated in the heat exchanger; and in the second operating mode the feeding of the first fluid flow and of the second fluid flow into the heat exchanger is partially or completely halted.

Abstract: The present invention relates to a method for the theoretical analysis of a process apparatus through which fluid flows, wherein a theoretical, in particular numerical simulation of the apparatus or of at least one part of the apparatus is carried out, wherein at least one element of the apparatus which does not comprise concrete as a material is replaced in the theoretical simulation by at least one concrete element which is manufactured from concrete, and wherein a load analysis of the apparatus is carried out with the aid of the theoretical simulation.

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 plate heat exchanger 1 with at least two cuboidal modules 1a, 1b. The two modules 1a and 1b are cuboidal and are each closed to the outside by cover sheets 5. The two modules 1a and 1b are arranged such that in each case, cover sheets 9a and 9b of the same size are directly adjacent. On the contact surfaces, sections 20a, 20b are welded that prevent movement of the two modules 1a, 1b perpendicular to the contact surfaces 9a, 9b either alone or with an additional formed part 50.

Abstract: A method for determining a stiffness of a tube bundle heat exchanger. The heat exchanger has a core tube and a plurality of coil tubes coiled around the core tube to form a tube bundle having a plurality of coil layers at a respective layer coiling angle. The method determines a geometric strength parameter for a coil layer, the strength parameter being an area ratio of a coil-tube cross-sectional area to a cell cross-sectional area resulting from the axial spacing of the coil tubes and an outer diameter of the coil tubes. The area ratio is corrected by a correction factor taking the orientation of the coil tubes of the coil layer in relation to the force of gravity acting on the coil tubes into consideration. The stiffness of the respective coil layer is determined from the corrected area ratio and a modulus of elasticity of the coil-tube material.

Abstract: A method for producing a plate heat exchanger with at least two heat exchanger blocks which are produced separately from one another in a soldering furnace Each heat exchanger block has multiple separating sheets arranged parallel to one another and which form a plurality of beat exchanger passages for fluids involved in a heat exchange process. At least one support provided with solder is heated in order to melt the solder, the support is arranged between opposing outer surfaces of the heat exchanger blocks to be connected which are placed one on top of the other or adjacently, the support(s) thus being fixed between the opposing outer surfaces. After the solder is hardened, a bonded and heat-conductive connection is produced between the heat exchanger blocks. Sheets or wire arrangement can be used as the supports.

Abstract: The invention relates to a plate-type heat exchanger having at least a first and second heat-transfer block, wherein each block has multiple separating plates, which are arranged parallel to one another, which form a multiplicity of heat-transfer passages for fluids taking part in the heat transfer. The heat-transfer blocks are outwardly bounded by cover plates. A first cover plate of the first heat-transfer block is secured to an opposite second cover plate of the second heat-transfer block. At least one elongate first profile is secured to the first cover plate. At least one elongate second profile running parallel to the at least one first profile is secured to the second cover plate such that the two profiles are opposite one another in a direction parallel to the cover plates. Between the two profiles there is an interspace in which an elongate element is arranged in an interference fit with the two profiles, such that the two cover plates and thus the two heat-transfer blocks are secured 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: A method for determining a stiffness of a tube bundle heat exchanger. The heat exchanger has a core tube and a plurality of coil tubes coiled around the core tube to form a tube bundle having a plurality of coil layers at a respective layer coiling angle. The method determines a geometric strength parameter for a coil layer, the strength parameter being an area ratio of a coil-tube cross-sectional area to a cell cross-sectional area resulting from the axial spacing of the coil tubes and an outer diameter of the coil tubes. The area ratio is corrected by a correction factor taking the orientation of the coil tubes of the coil layer in relation to the force of gravity acting on the coil tubes into consideration. The stiffness of the respective coil layer is determined from the corrected area ratio and a modulus of elasticity of the coil-tube material.

Abstract: A method for producing a plate heat exchanger with at least two heat exchanger blocks which are produced separately from one another in a soldering furnace. Each heat exchanger block has multiple separating sheets arranged parallel to one another and which form a plurality of heat exchanger passages for fluids involved in a heat exchange process. At least one support provided with solder is heated in order to melt the solder, the support is arranged between opposing outer surfaces of the heat exchanger blocks to be connected which are placed one on top of the other or adjacently, the support(s) thus being fixed between the opposing outer surfaces. After the solder is hardened, a bonded and heat-conductive connection is produced between the heat exchanger blocks. Sheets or wire arrangement can be used as the supports.

Abstract: The invention describes a plate heat exchanger 1 comprising two modules 1a and 1b. The two modules 1a and 1b are cuboidal and in each case are closed off to the outside by cover sheets 5. The two modules 1a and 1b are arranged such that cover sheets 9a and 9b of the same size are directly adjacent. The two cover sheets 9a and 9b form the contact surface between the two modules 1a and 1b of the plate heat exchanger 1. The two contact surfaces 9a and 9b are joined to one another via a suitable adhesive.

Abstract: The invention describes a plate heat exchanger 1 comprising two modules 1a and 1b. The two modules 1a and 1b are cuboidal and in each case are closed off to the outside by cover sheets 5. The two modules 1a and 1b are arranged such that cover sheets 9a and 9b of the same size are directly adjacent. The two cover sheets 9a and 9b form the contact surface between the two modules 1a and 1b of the plate heat exchanger 1. The two contact surfaces 9a and 9b are joined to one another via a suitable adhesive.

Abstract: A process for determining the strength of a plate-type heat exchanger includes computing the temperature stresses of the plate-type heat exchanger within the heat exchanger during its operation by a three-dimensional numerical simulation. Based on the computed temperature stresses, the strength of the plate-type heat exchanger is determined. The process for producing a plate-type heat exchanger with separating plates and profiles of metal uses this strength determination for establishing one or more mechanical parameters of the heat exchanger. The heat exchanger is manufactured with the one or more mechanical parameters.

Abstract: Plate heat exchanger for indirect heat exchange between at least two liquid and/or gaseous media with an essentially parallelepiped-shaped base (8), means for feeding and removing the media (headers 6, 6a, 7), and a number of passages (14), arranged essentially like stacks, for indirect heat exchange between media that respectively flow into adjacent passages (14), whereby the passages are formed by partitions (1, 22) that are spaced some distance apart, whereby the partitions are spaced some distance apart by end strips (4a, 4b), the passages have a corrugated profile (fins, 2), which is in heat-conductive contact with the partitions (1, 22) at its wave peaks and wave troughs, and the stack is closed off by a cover plate (5, 21), characterized in that the ratio between the width of the partition (B) and the repetition interval of the same characteristic of the corrugated profile as, for example, the repetition interval of two wave peaks (wavelength, LP) has a value in the range of between 15 and 80.

Abstract: A process for determining the strength of a plate-type heat exchanger includes computing the temperature stresses of the plate-type heat exchanger within the heat exchanger during its operation by a three-dimensional numerical simulation. Based on the computed temperature stresses, the strength of the plate-type heat exchanger is determined. The process for producing a plate-type heat exchanger with separating plates and profiles of metal uses this strength determination for establishing one or more mechanical parameters of the heat exchanger. The heat exchanger is manufactured with the one or more mechanical parameters.