Description: Das Projekt "Two blade propeller turbine suspended under a barge using kinetic energy of river flows" wird vom Umweltbundesamt gefördert und von Bodan-Werft Metallbau durchgeführt. Objective: To demonstrate how a two bladed propellor turbine suspended under a barge can exploit the kinetic energy of a river to produce electricity. General Information: The barge will be moored in the river and the kinetic energy of the river used to drive the propellor turbine, thus eliminating the need for expensive civil works. It is expected that the main application would be to supply local communities not connected to the national grid system, particularly in developing countries. A further advantage of the scheme is that, unlike conventional hydro systems, it can be very easily replicated. Initially a suction tube to concentrate water flow was envisaged, but this has now been omitted as it became apparent that it was only of advantage in very deep rivers. Suitable control mechanisms are being investigated to match the requirement for constant generator speed to variable river flow rates. Head 0 metres River velocity 2-3 m/second Turbine propellor (1. 44 metres diameter) Turbine power 40 kW Generator synchronous End-use isolated system Achievements: The apparatus proved very successful concerning manufacture, transport, sea-going quality (local velocity of current up to 4 m/s were tested). stability with propeller swung up. Propeller support with lifting device and foundations for gears and generator. The two-bladed propeller could cope well with stripping off driftage. The chain (L approx. 2,8 m) is extremely suitable for the transmission of the high torque and can be adapted to suit power output. Fluctuations during the turning moment probably caused by vibrations of the chain can be reduced by baffle rods. Presumably turbulences around the 'suction pipe' contribute to the fluctuations. These turbulences could possibly be avoided or at least reduced by the profiling of the 'suction pipe' on the descending current side. By means of the demonstration model it can be proved that, in principle, the system functions. In case of a series production the control system must be improved appropriately. The turning moments left of the optimum of the moment curves, plotted against the rotations per minute, could not be determined, as the propeller dragged in the optimum area and either came to a stand-still or operated right of the optimum. Operation costs were estimated at approx. 7,5 per cent of the investment expenses, whereby it was assumed that paint work would have to be done every 3-4 years. The operation expenses could be brought down under good water conditions. The efficiency of the propeller could be maintained by regular cleaning. (Slight roughness caused by marine fouling causes a loss of up to 20 per cent). Whereas the entire floating body and the main parts of the machinery and the transmission have been developed for quantity production, the control system must still be further developed in this respect. The presumable service life is estimated to be approx. 15 years. The power output depends very strongly upon the flow...
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Strömungsenergie ? Fluss ? Elektrizität ? Fließgewässer ? Flugtriebwerk ? Wasserkraft ? Anstrichmittel ? Flussbegradigung ? Main ? Anlagenoptimierung ? Stromerzeugung ? Energieversorgung ? Kommune ? Getriebe ? U-Bahn ? Wasserreinigung ? Erschütterung ? Biofouling ? Tiefenwasser ? Kostensenkung ? Wasserströmung ? Kontrollsystem ? Propeller ? Schiff ? Strömungsmechanik ? Wasseraufbereitung ? Wasserqualität ? Energie ? Energieeinsparung ? Wirkungsgrad ? Oberflächenbehandlung ? Energietechnik ? Energieumwandlung ? Entwicklungsland ? Fließgeschwindigkeit ? Antriebstechnik ? Betriebskosten ? Investition ? Lebenszyklus ? Rohrleitung ? Turbulenz ? Versuchsanlage ? Anlagenbetrieb ? Transmission ? Rechte ? Fluss [Bewegung] ? Drehzahl ? Stationärer Betrieb ? Turbomaschine ? renewable sources of energy ? Nachweisbarkeit ?
Region: Baden-Württemberg
Bounding box: 9° .. 9° x 48.5° .. 48.5°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1985-11-08 - 1988-06-30
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