Determination of the mechanical power losses of engine-compressor GMVH for diagnostic purposes

• Autorzy: Łutowicz M.
• Języki publikacji: EN

Abstrakty

EN

The engine-compressors GMVH types are used in the national gas transmission system in Poland. There is a danger of scuffing of the working components of the engine-compressor particular pistons and cylinders during the process of their exploitation. The growth of resistance in motion parts of the machine is the main symptom of the scuffing. In the cinematic system of the engine-compressor where the engine and compressor are fully mechanically integrated it is impossible to assess the power of mechanical friction without stopping the machine. But if the engine-compressor is equipped with a cylinder pressure measuring system it is possible to determine the indicated power of all compressor and engine cylinders and assess the friction losses as a difference between the sum of the engine 's cylinder s indicated power and the sum of the compressor's cylinders indicated power. In the differential measurements of absolute values measuring errors are accumulated so considerable uncertainty of the measured parameter is expected. The accuracy of the friction power losses assessment method is not sufficient for research purposes. However, despite the expected significant errors, assessed parameters trends observation should allow to detect ofrapid changes of machine technical condition caused by piton scuffing. To ensure the sense of this method a precise measurements and in particular the error consistency of indicated pressure assessment of all cylinders in long time period are necessary. The experience from engine-compressors monitoring and diagnostic system services, the main sources of errors and methods for their minimization are described in the paper.

Słowa kluczowe

EN

combustion engines; engine-compressor; indicating; MIP; pressure sensors

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2010
• Tom: Vol. 17, No. 3
• Strony: 279--286
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Łutowicz M.

• Polish Naval Academy, Department of Mechanical and Electrical Engineering Śmidowicza Street 69, 81-103 Gdynia, Poland tel: [phone],

Bibliografia

• [1] Łutowicz, M., Evaluation of the Condition of Cylinder Systems of the Engine Based on an Compression Process Analisis, Polish Journal of Environmental Studies, Vol. 18, No. 2A, 2009.
• [2] Polanowski, S., Determination of location of Top Dead Centre and compression ratio value on the basis of ship engine indicator diagram, Polish Maritime Research, No. 2(56), Vol. 15, 2008.
• [3] Tazerout, M., Le Corre, O., Rousseau, S., TDC Determination in IC Engines Based on the Thermodynamic. SAE Paper No. 1999-01-1489.
• [4] Wimmer, A., Glaser, J., The indicated engine, AVL, Warsaw 2004.