Validation of transient time method to calibrate oil flow meters in closed conduits using 123I as the radiotracer Cover

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Validation of transient time method to calibrate oil flow meters in closed conduits using 123I as the radiotracer

Volume 66 (2021): Issue 2 (June 2021)

By: Eduardo R. Gonçalves, Luís E. B. Brandão and Delson Braz

Open Access

|Jun 2021

Figures & Tables

Influence of temperature on the labelled oil stability.

The apparatus used to study the radiotracer stability.

Three scintillator probes registering the gamma count at the base, middle, and top sector of the test device with 74 MBq of labelled oil.

A top view of the scattering device in (a) and (b) is used to analyse the internal pipe wall.

Mean flow velocity (in cm/s) for injections T1, T2, and T3, and RV = 1000 L/h (Reynolds number = 10 107)

Injection	D1D2	D1D3	D1D4	D2D3	D2D4	D3D4	V_M
T1	97.26	96.95	98.89	97.14	97.78	97.08	97.52
T2	96.86	98.22	97.13	96.99	98.08	97.68	97.49
T3	98.46	97.21	98.09	97.39	97.01	97.95	97.69

			Mean velocity		97.57 ± 0.31 cm/s
			Oil flow rate		1001.14 ± 8.16 L/h

Relationship between flow measurement data

RV ± 0.25% (L/h)	Q (L/h)	rv%	Percent error
800	797.72 ± 6.57	0.824	0.28
950	944.84 ± 7.56	0.800	0.54
1000	1001.14 ± 8.16	0.815	0.11

Mean flow velocity (in cm/s) for injections T1, T2, and T3, and RV = 950 L/h (Reynolds number = 9600)

Injection	D1D2	D1D3	D1D4	D2D3	D2D4	D3D4	V_M
T1	93.16	90.07	92.24	91.85	93.87	91.12	92.04
T2	93.11	91.02	91.02	91.12	92.23	92.85	92.01
T3	93.07	90.47	91.92	93.09	93.89	90.86	92.50

			Mean velocity		92.18 ± 0.26 cm/s
			Oil flow rate		944.84 ± 7.56 L/h

Pipeline scan in the measurement positions using a 241Am gamma source

	Total gamma-ray counts
	Position D1	Position D2	Position D3	Position D4
Vertical	8188 ± 90	8194 ± 90	8209 ± 91	8175 ± 90
Horizontal	8002 ± 89	8000 ± 89	8001 ± 90	7990 ± 89

The yield of 123I oil labelling process

Sample	WLS-1A	WLS-1B	OLS-2	WLS-3A	WLS-3B	OLS-3A	OLS-3B
Yield (%)	7.81	5.12	88.74	0.44	0.38	85.46	84.92

Mean flow velocity (in cm/s) for injections T1, T2, and T3, and RV = 800 L/h (Reynolds number = 8085)

Injection	D1D2	D1D3	D1D4	D2D3	D2D4	D3D4	V_M
T1	76.95	78.36	77.53	77.59	76.87	77.87	77.53
T2	76.89	77.99	78.09	77.87	78.22	77.96	77.84
T3	76.83	78.39	77.60	77.99	78.14	78.19	77.86

			Mean velocity		77.74 ± 0.27 cm/s
			Oil flow rate		797.72 ± 6.57 L/h

DOI: https://doi.org/10.2478/nuka-2021-0009 | Journal eISSN: 1508-5791 | Journal ISSN: 0029-5922

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Language: English

Page range: 69 - 74

Submitted on: Mar 20, 2020

Accepted on: Nov 19, 2020

Published on: Jun 8, 2021

Published by: Institute of Nuclear Chemistry and Technology

In partnership with: Paradigm Publishing Services

Publication frequency: 4 issues per year

Keywords:

Calibration flow meters,

Oil flow rates,

Transient time method

Related subjects:

Nuclear chemistry,

Astronomy and astrophysics,

© 2021 Eduardo R. Gonçalves, Luís E. B. Brandão, Delson Braz, published by Institute of Nuclear Chemistry and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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