Optimization of the differential pressure flowmeters by means of “Raskhod-RU” CAD
Keywords:
differential pressure, flowmeter, measurement, optimization.Abstract
New methodology of designing of the differential pressure flowmeters, which are optimal as to the accuracy of flowrate
measurement is developed in order to provide minimum uncertainty of flowrate measurement results. This methodology is
implemented in “Raskhod-RU” CAD system for computer aided design and calculation of differential pressure flowmeters.
“Raskhod-RU” CAD meets the requirements of the new Standards (DSTU GOST 8.586.1,2,3,4,5–2009 and GOST
8.586.1,2,3,4,5–2005) and provides accomplishment of the following tasks: verification of conditions (constraints) for the
application of the differential pressure method according to the requirements of the new Standards; calculation of primary
device parameters, pipe straight lengths and flowmeter in general according to the requirements of the new Standards;
calculation of uncertainty of fluid flowrate and volume measurement results; design of an optimal flowmeter as to the
accuracy of flowrate measurement.
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References
flow by means of pressure differential devices inserted in
circular cross-section conduits running full – Part 1: general
principles and requirements. Part 2: Orifice plates. Part 3:
Nozzles and Venturi nozzles. Part 4: Venturi tubes, ISO 5167-
1:2003, International Organization for Standardization.
Available from: http://www.iso.org. [16 May 2013].
[2] International Standard 2005, Measurement of
Flowrate and Volume of Liquid and Gas by Means of
Standard Pressure Differential Devices – Part 1. Principle of
method of measurement and general requirements. Part 2.
Orifice plates. Technical requirements. Part 3. Nozzles and
Venturi nozzles. Technical requirements. Part 4. Venturi
tubes. Technical requirements. Part 5. Technique for making
the measurements, GOST 8.586.1–2005 (ISO 5167-1:2003),
International Organization for Standardization. Available
from: www.gost-svarka.ru. [16 May 2013].
[3] Pistun, Ye & Lesovoy, L 2006, Standartization of
differential pressure flowmeters, Institute of Energy Audit
and Energy Carrier Accounting, Lviv.
[4] Pistun, Ye, Lesovoy, L, Matiko, D, Markovskyy, D
& Lesovoy, R 2007, Computer program “Raskhod-RU” CAD.
User manual, Institute of Energy Audit and Energy Carrier
Accounting, Lviv.
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