Abstract
This paper discusses the application of a thermodynamic method of measurement to determine the efficiency of boiler feed pumps in large and modern generating sets, and reasons for the development of the method are presented. The principle of the thermodynamic method is defined, and the difference between this method and the classical one is specified. A description is given of the instrumentation used when the thermodynamic method is applied. The results of thermodynamic measurements are analysed and discussed, and the calculated efficiency is compared with the efficiency determined when the classic method is used. The paper finally presents the programme of trials that were undertaken on the boiler feed pumps of modern units of Electricité de France.
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