Effect of flow pulsations on the accuracy of differential pressure flowmeters

• Autorzy: Kostyk I. , Matiko F. , Fedoryshyn R.

Identyfikatory

DOI

10.5604/01.3001.0012.1021

• Języki publikacji: EN

Abstrakty

EN

This work deals with investigation of influence of flow pulsation on the accuracy of gas flow rate and volume measurement by means of the differential pressure flow meters. Experimental studies of the step response curves of an impulse line with a pressure transducer (PT) were carried out with application of a high-frequency analog-to-digital converter of the pressure signal in the PT chamber. Mathematical model of an impulse line with a PT was built. This model provides simulation and investigation of the transient processes with high accuracy. The influence of the impulse line design (length, diameter) on the step response curves and on the frequency response curves as well as on the resonant frequency of the oscillating system (an impulse line with a PT chamber) was studied. The systematic errors of flow rate and volume measurement due to the resonance in the impulse lines which was caused by flow pulsation were simulated and studied for an acting differential pressure natural gas metering system. On the basis of the calculation results it was defined that amplification of the amplitude of the oscillating signal of the differential pressure due to the resonance may lead to a negative systematic error of gas volume measurement. The systematic errors of gas flow rate and volume measurement caused by the flow pulsation can be reduced by choosing the correct design of the impulse lines in order to avoid the resonance.

Słowa kluczowe

EN

flow; pulsations; impulse line; resonance; error; differential pressure flowmeter

PL

przepływ; pulsacje; linia impulsu; rezonans; błąd; przepływomierz różnicowy

• Wydawca: Foundation for Young Scientists
• Czasopismo: Challenges of Modern Technology
• Rocznik: 2017
• Tom: Vol. 8, no. 1
• Strony: 23--31
• Opis fizyczny: Bibliogr. 9 poz., rys., wykr., tab.

Twórcy

autor

Kostyk I.

• Lviv Polytechnic National University, Department of Automation of Heat and Chemical Processes, Institute of Energy Engineering and Control Systems, S. Bandery St. 12, Lviv, 79013, Ukraine

autor

Matiko F.

• Lviv Polytechnic National University, Department of Automation of Heat and Chemical Processes, Lviv Polytechnic National University, S. Bandery St. 12, Lviv, 79013, Ukraine

autor

Fedoryshyn R.

• Lviv Polytechnic National University, Department of Automation of Heat and Chemical Processes, Institute of Energy Engineering and Control Systems, S. Bandery St. 12, Lviv, 79013, Ukraine

Bibliografia

• 1. Kostyk I.V., Matiko F. D. Investigation of Dynamic Characteristics of Impulse Lines of Pressure Measuring Transducers // Methods and devices for quality control. – 2014 – No. 1(32). – p. 83-92. (published in Ukrainian).
• 2. Fedoryshyn R. M., Hren, Y. V., Matiko F. D. Simulation of Dynamic Characteristics of Impulse Lines of Differential Pressure Flow Meters // Proc. of LPNU: Heat Power Engineering. Environmental Engineering. Automation. – 2009. – No. 659. – p. 73-78 (published in Ukrainian).
• 3. ISO/TR 3313:1998 Measurement of fluid flow in closed conduits — Guidelines on the effects of flow pulsations on flowmeasurement instruments.
• 4. Kremlevskiy P. P. Flow and Volume Meters: Reference Book. – 4th edition. – Leningrad. Mashynostroenie, 1989. – 701 p. (published in Russian).
• 5. DSTU GOST 8.586.5:2007 Measurement of Flow Rate and Volume of Liquids and Gases by Means of the Standard Differential Pressure Devices. Part 5. Measurement Technique. – Kyiv. National Organization for Standardization in Ukraine. (published in Ukrainian).
• 6. Kulinchenko V. R. Hydraulics, Hydraulic Machines and Dri - ves: Text Book. Kyiv. “Inkos”, 2006. – 616 p. (published in Ukrainian).
• 7. GOST 30319.2-96 Natural Gas. Methods for Calculation of Physical Properties. Definition of the Compressibility Coefficient. (published in Russian).
• 8. Altshul A. D. Hydraulic Resistances. - 2nd edition. Moscow, Nedra, 1982, 224 p. (published in Russian).
• 9. Pistun Y. P., Lesovoi L. V., Matiko F. D., Markovskyi D. I., Lesovoi R. L. “Raskhod-RU” CAD software. User Manual. Lviv. Publishing House of Institute of Energy Audit and Energy Carrier Accounting, 2007 – 127 p. (published in Ukrainian).