Description: Das Projekt "Elektronisch gesteuerter Antrieb mit konstanter Geschwindigkeit fuer Elektrizitaetsgeneratoren auf Seeschiffen" wird vom Umweltbundesamt gefördert und von Zahnradfabrik Renk AG durchgeführt. Objective: Generators on ships are usually driven by auxiliary diesel engines. Alternatively, they are driven by the main engine. To compensate for the varying speed of the main engine, thyristor control may be used to produce the required constant frequency. These drives have a relatively high fuel consumption or poor efficiency. The aim is to attain constant generator speed by using a self-regulating planetary gear which is equipped with advanced electronic controls for all the necessary conditions. The resulting improvement in efficiency was expected to lead to an annual energy saving of 65 TOE for a generator power of about 860 kW. (Final savings were however in excess of 400 TOE/yr.). General Information: Generators for the on-board generation of electric power are preferably driven by the main engine for reasons of cost. In the case of a fixed pitch propeller system, considerable effort of control is necessary to keep the frequency of the current constant. This is due to the extreme fluctuations in propeller speed. The purpose of the project is to demonstrate that a controllable gear (called RCF-gear) is capable of compensating these fluctuations and that the generator can therefore be operated at constant speed. The RCF-gear consists of a planetary unit combined with a hydrostatic unit. A hydrostatic pump drives the ring gear (annulus) of the planetary gear in both directions and therefore changes the transmission ratio of the RCF-gear in an infinitely variable way. For a conventional auxiliary diesel generator of 860 kW, the fuel consumption is 1085 TOE/year. For a generator driven by RCF-gear, one will obtain 825 TOE/year. The savings are therefore to the maximum 260 TOE/year. In practice, some reductions must be made to take into account the running conditions of the main engine and the load conditions of the generator. This leads to a saving of 65 TOE/year. On-bed and on-board tests will check the reliability of the gear and its electronic in single operation and also in parallel operation with auxiliary diesel generators, and will determine the efficiencies, functions and effective savings. Achievements: First tests were carried out on the test-stand in the contractor's works where the drive was effected by a variable-speed electric motor. Tests fully confirmed the theoretical considerations and performance qualities of the RCF-gear system in all important points (efficiency, control functions at various load and speed profiles), both in single and in parallel operational mode. Additional tests were carried out on the test-stand of a diesel engine manufacturer, where the drive was effected by a marine diesel engine. Performance parameters of the RCF-gear were verified again. The RCF-gear was then modified to the RCF/TCS-gear, adding facilities to utilize exhaust gas in a turbine to further increase energy savings. Two 800 kW gears where then installed on two ships to demonstrate performance and benefit under realistic conditions...
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Dieselkraftstoff ? Elektrische Leistung ? Pech ? Dieselmotor ? Elektronik ? Kraftstoffverbrauch ? Flugtriebwerk ? Blei ? Main ? Seeschiff ? Stromerzeugung ? Elektromotor ? Anlagenoptimierung ? Abgasrückführung ? Getriebe ? Regeltechnik ? Belastbarkeit ? Brennstoffverbrauch ? Abgasreduzierung ? Abgas ? Energie ? Energieeinsparung ? Energiegewinnung ? Kontrollsystem ? Anlagenüberwachung ? Meerestechnik ? Motor ? Antriebstechnik ? Propeller ? Pumpe ? Schiff ? Vergleichsanalyse ? Wirkungsgrad ? Wirtschaftlichkeit ? Kreislaufwirtschaft ? Alternativtechnologie ? Versuchsanlage ? Physikalische Größe ? Effizienzsteigerung ? Transmission ? Kenngröße ? RCF-Getriebe ? Schiffsausrüstung ? Turbomaschine ? Prüfstand ? RCF/TCS-Getriebe ?
Region: Bayern
Bounding box: 12.53381° .. 12.53381° x 47.795° .. 47.795°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1983-11-01 - 1986-12-31
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