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The importance of measuring mass intensity of flow air through the compressor in diagnostics the turbocharger system marine engine

Witkowski K.

Journal of Polish CIMAC

2012

Vol. 7, no 2

249-254

The paper presents an analysis of the possibility of diagnosing the elements of turbocharger system marine diesel engine. Meaning of diagnostics of this system has also been discussed pointing out the most important consequences resulting from deterioration of supercharger system activity. Work evaluation of supercharger system is usually carried out on the basis of the following parameters: temperature and pressure of supercharging air in the scavenging air receiver (td , pd), pressure drop in air filter and air cooler (pf , pch), temperature exhaust gases before and after the turbine (twyl 1 , twyl 2), temperature of overboard water before and after the air cooler (tch 1 i tch 2), turbocharger rotational speed (nTS ), pressure drop on the exhaust gas boiler (pku) – counterpressure of exhaust. In exploitation practice of turbocharger system diagnostic, mass intensity of flow air through the turbocharger is not used and unfortunately measurement of this size is not realized. But in compressor diagnostics however, it is the basic exit parameter and the enter one for the rest of the elements. Based on research results demonstrated the possibility to use to calculation the mass intensity of flow air through the compressor, measurement pressure drop on the confusor of the compressor. This calculation should be widely used in exploitation practice. This method is easy enough and sufficiently precise, in order to be used in the diagnostics the marine diesel engines.