High charge-air pressure, turbochargers with a high overall efficiency and exhaust systems which contribute little towards utilization of the exhaust pulses at part load, result in there being a shortage of charge-air pressure at reduced engine speed, e.g. when fixed-pitch propellers are operating at part load. To overcome this deficiency there are a number of possible measures, such as auxiliary blowers, turbochargers with auxiliary drive, pulse charging at part load, blowing off air or exhaust gas at full load, provision of a bypass from compressor to turbine - with or without heat exchanger - variable equivalent nozzle area of the turbines, 'sequential' turbocharging, as well as variable or fixed valve timings optimized for part load with increased charge-air pressure. The results, presented herein, of an exhaustive thermodynamic investigation should enable the most suitable solution to be chosen for given conditions.


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    Title :

    Part-load operation of very high turbocharged four-stroke marine diesel engines


    Additional title:

    Teillastbetrieb sehr hoch aufgeladener Viertakt-Schiffsdieselmotoren


    Contributors:
    Meier, E. (author)


    Publication date :

    1983


    Size :

    21 Seiten, 14 Bilder, 12 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English





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