ESTIMATES OF THE ERROR OF EXPERIMENTAL DATA AT STUDIES OF DENSITY AND THE SATURATED VAPOR PRESSURE (SVP) PETROLEUM PRODUCTS

At calculations, we have used the next assumptions: 1. Not excluded systematic errors distributed with equal probability; 2. Random errors are normally distributed; 3. Total error is the composition of not excluded systematic and random errors. In calculating of measurement error of pressure, we pro...

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Bibliographic Details
Published inNaucnyj zurnal Kubanskogo gosudarstvennogo agrarnogo universiteta pp. 492 - 503
Main Authors Kharchenko P. M, Timofeev V. P, Chizhov D. S, Khristichienko V. V
Format Journal Article
LanguageEnglish
Published Kuban State Agrarian University 30.10.2015
Subjects
CALCULATIONS
CONFIDENCE LIMITS
ERROR ESTIMATION
EXPERIMENTAL DATA
SATURATED VAPOR PRESSURE (SVP)
TEMPERATURE
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Summary:At calculations, we have used the next assumptions: 1. Not excluded systematic errors distributed with equal probability; 2. Random errors are normally distributed; 3. Total error is the composition of not excluded systematic and random errors. In calculating of measurement error of pressure, we proceeded from working formula. The confidence interval of each variable less than instrumental error, therefore, to characterize the total error of the measured value P, we use the instrumental errors of all variables. In estimating of temperature measurement error was consider the systematic and random error. To estimate random error we used measurement data of the specific volume of water on six isotherms. Obtained values were compared with published data. As an approximate estimate of the random error of our experimental data, we can take it as a total for all the isotherms of the specific volume in comparison with the published data. For studied fractions confidence limit of total error of measurement results located in the range of 0,03 ч 0,1%. At temperatures close to the critical increasing influence of errors of reference and the error associated with the introduction of corrections on the thermal expansion of the piezometer. In the two-phase area confidence limit of total error increases and located between 0,08 ч 0,15%. This is due to the sharp increase in this area of reference error of pressure and error in determining to the weight of the substance in the piezometer
Bibliography:http://ej.kubagro.ru/2015/08/pdf/37.pdf
ISSN:1990-4665
1990-4665