Abstract: The invention relates to a method for operating a steam power plant, comprising a steam engine which is operated with a vaporous working medium, an evaporator for evaporating the working medium; a condenser for liquefying the working medium and a reservoir for the working medium. The invention is characterized in that a lubricant sump in a housing of the steam engine is heated to a temperature above the evaporating temperature of the working medium by means of a heating device during the starting phase of the steam engine.

Abstract: The invention relates to a tube bundle heat exchanger having a plurality of tube windings (1) through which a heat transfer medium flows in parallel. The tube windings start from a common inlet chamber (2) for the heat transfer medium and open into a common outlet chamber (3). Each tube winding comprises an alternating sequence of tube sections (6) running alternately in two planes parallel to each other, and tube bends (7) connecting same, wherein within each of the two planes four or more pipe sections extend disposed side by side or parallel to each other, and wherein the pipe bends are designed to have a change of direction through 180° with respect to an associated bend axis and have the same bend radii.

Abstract: The invention relates to a working fluid for a steam circuit process carried out in a device comprising a steam generator, an expander, a condenser, and a reservoir for the working fluid, comprising a working medium that evaporates by the addition of heat in a steam generator, performs mechanical work by expanding in the expander during the steam phase, and condenses in the condenser; an ionic fluid serving as an antifreeze component and having a melting point in the reservoir below the freezing point of the working medium, wherein the decomposition temperature of the ionic fluid is above the evaporating temperature of the working medium in the steam generator.

Abstract: A drive train for a motor vehicle includes: a vehicle drive engine for driving the motor vehicle via a vehicle drive shaft driven by a vehicle drive engine; and a compressor which can be driven optionally or permanently for compressing air for a compressed-air system of the motor vehicle. The compressor is associated with at least one drive unit in the form of a steam-driven expansion machine by which the compressor can be driven.

Abstract: The invention concerns a heat exchanger for transmitting heat from a heating medium, in particular from the exhaust gas stream of an internal combustion engine, to a working fluid, which evaporates in the heat exchanger, comprising an alternating stacking order made of guiding layers for the heating medium and guiding layers for the working fluid; wherein the heating medium and the working fluid are injected in the cross counterflow; whereas each guiding layer for the working fluid comprises a channel plate, which has at least one meandering passage opening, whereas cover plates are arranged on both sides of the channel plate, which cover plates seal laterally the passage opening by forming a working fluid channel, except for an inlet and an outlet, wherein the channel plate is materially connected to the cover plates; and whereas the working fluid channel includes a first section, outgoing from the inlet, with a first free cross-section and a second section emerging in the outlet, with a second free cross-se

Abstract: The invention relates to an operating fluid for a steam cycle process apparatus comprising a steam generator, an expander, a condenser and a reservoir for the operating fluid, comprising a working medium that evaporates by supplying heat in the steam generator, performs mechanical work in the vapour phase by expanding in the expander and condenses in the condenser and an ionic liquid which forms a mixture with the working medium, wherein the melting point of the mixture lies below ?5° C.

Abstract: The invention relates to a steam circuit process device, comprising a reservoir for a liquid working medium; an evaporator in which the working medium is evaporated by heat supply, the vaporous working medium being fed to an expander for expansion and for carrying out mechanical work and being subsequently liquefied in a capacitor which communicates with the reservoir; a working medium pump for supplying working medium from the reservoir to the evaporator. The invention is characterized in that liquid working medium is supplied in the direction of flow of the working medium upstream or in the region of the capacitor to the working medium exiting the expander.

Abstract: The invention relates to a steam cycle apparatus, comprising a reservoir for a liquid operating medium; an evaporator in which the operating medium is evaporator by supply of heat, with the vaporous operating medium being supplied to an expander for expansion and for performing mechanical work and subsequently being liquefied in a condenser which is in connection with a reservoir; an operating medium pump for supplying operating medium from the reservoir to a feed line to the evaporator; a feedback control unit (7) for the operating medium flow; characterized in that the operating medium pump comprises a bypass line which produces a connection between the input side of the operating medium pump and the output side of the operating medium pump, with a controlled overflow valve being arranged in the bypass line whose control element is triggered by the feedback control unit for the operating medium flow for regulating the pressure and/or volume flow of the operating medium in the feed line to the evaporator.

Abstract: The invention relates to a working fluid for a steam circuit process carried out in a device comprising a steam generator, an expander, a condenser, and a reservoir for the working fluid, comprising a working medium that evaporates by the addition of heat in a steam generator, performs mechanical work by expanding in the expander during the steam phase, and condenses in the condenser; an ionic fluid serving as an antifreeze component and having a melting point in the reservoir below the freezing point of the working medium, wherein the decomposition temperature of the ionic fluid is above the evaporating temperature of the working medium in the steam generator.

Abstract: The invention relates to a vaporizer for a working medium for operating a vapor circulation process, including a working medium inlet section, a heat exchanger section, and a vapor collection section for the vaporized working medium, which are constructed as a stacking sequence from a plurality of materially bonded plates having through openings, a first channel system for conducting the heat transfer medium and a second channel system for conducting the working medium, which is hydraulically separated from the first channel system, being applied in the heat exchanger section, and the first channel system and the second channel system each being implemented by a partial overlap of the through openings of adjacent plates.

Abstract: A drive train for a motor vehicle includes: a vehicle drive engine for driving the motor vehicle via a vehicle drive shaft driven by a vehicle drive engine; and a compressor which can be driven optionally or permanently for compressing air for a compressed-air system of the motor vehicle. The compressor is associated with at least one drive unit in the form of a steam-driven expansion machine by which the compressor can be driven.

Abstract: The invention relates to a steam cycle apparatus, comprising a reservoir for a liquid operating medium; an evaporator in which the operating medium is evaporator by supply of heat, with the vaporous operating medium being supplied to an expander for expansion and for performing mechanical work and subsequently being liquefied in a condenser which is in connection with a reservoir; an operating medium pump for supplying operating medium from the reservoir to a feed line to the evaporator; a feedback control unit (7) for the operating medium flow; characterized in that the operating medium pump comprises a bypass line which produces a connection between the input side of the operating medium pump and the output side of the operating medium pump, with a controlled overflow valve being arranged in the bypass line whose control element is triggered by the feedback control unit for the operating medium flow for regulating the pressure and/or volume flow of the operating medium in the feed line to the evaporator.