【作者】

Nikolaos Kyrtatos，Stefanos Glaros

【摘要】

论文已在中国上海举行的2013年CIMAC大会上发表，论文的版权归CIMAC所有。The general practice in ship engine performance monitoring is to record important engine parameters (i.e. pressures, temperatures, speeds etc.). Some shipping companies include cylinder pressures and shaft torque recordings. Periodically, data is collected in a service report form and forwarded to headquarters for further processing and evaluation. Whilst most marine diesel engines are fitted with some type of condition monitoring, the thermodynamic performance evaluation systems used in the aerospace and process industries, have not been widely used in performance assessment of marine diesel ship propulsion and auxiliary engines. One reason is the complexity of the diesel engine process requiring sophisticated thermodynamic models. This paper presents the procedure applied for shipboard engine performance evaluation, using a thermodynamic model to generate reference data. The model, which requires some detailed geometric information for each specific engine, was initially calibrated using the shop tests data and validated for accuracy using the sea trials data and early service data of the specific engine. Then, the recordings from monthly in-service performance reports were compared to simulation predictions for the same operating conditions. Any important differences between obtained(measured) and expected (simulation) values may point out to component or process problems. Thus, in cases where the deviations in the various engine operating parameters exceeded a limit of 3%, the cause was investigated. In some possible operating conditions of a ship dictated by market conditions, no prior operating data was available. Also presented in the paper are results of simulations using the validated model of the specific engine at very low loads (<20%), to predict engine performance, prior to actual operation.

【会议名称】

第27届CIMAC会议

【会议地点】

上海

【下载次数】

2

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