Energiewandlung in trockenlaufenden Schraubenmotoren
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Date
2016
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Abstract
Die Arbeit diskutiert die physikalischen Vorgänge in trockenlaufenden Schraubenmotoren, bei der Wandlung eines thermischen Energieangebots in mechanisch nutzbare Wellenarbeit. In experimentellen und theoretischen Untersuchungen werden die technisch-physikalischen Wirkmechanismen sowohl autark, als auch interagierend, analysiert und hinsichtlich ihrer Anteile an der Gesamtenergiewandlung bewertet. Um die Wirkung der unterschiedlichen Mechanismen, in Abhängigkeit von den Anlagenparametern, möglichst allgemeingültig beschreiben und quantifiziert beurteilen zu können, werden mit den Schraubenmotoren GL51.2-M und SE69 zwei Maschinenvarianten eingesetzt, die sich im Hinblick auf ihre geometrischen Para-meter und Konstruktionscharakteristika teilweise signifikant voneinander unter-scheiden. In weiterführenden theoretischen Untersuchungen, wird der Einfluss der geometrischen Maschinenparameter von Schraubenmotoren auf die Energiewand-lungsgüte für die Arbeitsfluide trockene Luft und überhitzten Wasserdampf disku-tiert. Die Interaktion der geometrischen Parameter mit den Anlagenbedingungen wird abschließend in CRC-Kreisläufen, mit thermischen Leistungen zwischen 125 und 500 kW, untersucht.
The present work discusses the physical processes affecting dry running rotary screw-type motors, when converting a source of thermal energy into mechanically useful work. Experimental and theoretical research tasks involved analysing the technical physical mechanisms both in isolation and interactively, and evaluating them in relation to overall rates of energy efficiency. In order to describe and quan-titatively evaluate the impact of the various mechanisms in relation to the system parameters in as generalised a manner as possible, two variants of such machines were deployed – screw-type motors models GL51.2-M and SE69 – which differ sub-stantially in various ways in their geometrical parameters and structural character-istics. The theoretical research includs an evaluation of the effect of the geomet-rical parameters on the energy efficiency of screw-type motors. The results were grouped into the figures that assumed dry air and superheated water steam as the operating media. Finally, the interaction of the geometrical parameters with the system conditions in CRC circuits are investigated for thermal outputs between 125 and 500 kW.
The present work discusses the physical processes affecting dry running rotary screw-type motors, when converting a source of thermal energy into mechanically useful work. Experimental and theoretical research tasks involved analysing the technical physical mechanisms both in isolation and interactively, and evaluating them in relation to overall rates of energy efficiency. In order to describe and quan-titatively evaluate the impact of the various mechanisms in relation to the system parameters in as generalised a manner as possible, two variants of such machines were deployed – screw-type motors models GL51.2-M and SE69 – which differ sub-stantially in various ways in their geometrical parameters and structural character-istics. The theoretical research includs an evaluation of the effect of the geomet-rical parameters on the energy efficiency of screw-type motors. The results were grouped into the figures that assumed dry air and superheated water steam as the operating media. Finally, the interaction of the geometrical parameters with the system conditions in CRC circuits are investigated for thermal outputs between 125 and 500 kW.
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Schraubenmotor, Schraubenexpander, Schraubenmaschine, CRC-Kreislauf