Optimization of injected radiotracer volume for flow rate measurement in closed conduits

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00347237" target="_blank" >RIV/68407700:21340/20:00347237 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.2298/HEMIND20050325P" target="_blank" >https://doi.org/10.2298/HEMIND20050325P</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2298/HEMIND20050325P" target="_blank" >10.2298/HEMIND20050325P</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Optimization of injected radiotracer volume for flow rate measurement in closed conduits

Popis výsledku v původním jazyce

In chemical processes it is essential that the flow in the process is accurately defined. Fluid velocity measurements are important for fluid flow quality performance in flow systems. This study focuses on determination of the volumetric flow rate and its standard (relative) deviation for calibration of conventional flow meters by using a radiotracer approach. The measurements for flow meter calibration were performed at a pilot-scale flow rig using Technetium-99 m (99mTc) as a radiotracer in the form of pertechnetate ion (99mTcO4-). The measured data were analyzed, and precision of the experimental setup was investigated under two different approaches – IAEA’s RTD software and sum approximation of raw data. For the first time, the variation of standard deviation of calculated flow rate with the injection volume and activity of the radiotracer was determined. Plug flow with axial dispersion was used to simulate the measured RTD curves and investigate the flow dynamics of the flowing water. The results of the study have shown the possibility of in situ calibration of flow meters with a relative error lower than 1 %. They also revealed a slight dependency of the precision of output results on the injection volume as well as similar results for manual and specialized RTD software data processing.

Název v anglickém jazyce

Optimization of injected radiotracer volume for flow rate measurement in closed conduits

Popis výsledku anglicky

In chemical processes it is essential that the flow in the process is accurately defined. Fluid velocity measurements are important for fluid flow quality performance in flow systems. This study focuses on determination of the volumetric flow rate and its standard (relative) deviation for calibration of conventional flow meters by using a radiotracer approach. The measurements for flow meter calibration were performed at a pilot-scale flow rig using Technetium-99 m (99mTc) as a radiotracer in the form of pertechnetate ion (99mTcO4-). The measured data were analyzed, and precision of the experimental setup was investigated under two different approaches – IAEA’s RTD software and sum approximation of raw data. For the first time, the variation of standard deviation of calculated flow rate with the injection volume and activity of the radiotracer was determined. Plug flow with axial dispersion was used to simulate the measured RTD curves and investigate the flow dynamics of the flowing water. The results of the study have shown the possibility of in situ calibration of flow meters with a relative error lower than 1 %. They also revealed a slight dependency of the precision of output results on the injection volume as well as similar results for manual and specialized RTD software data processing.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Hemijska Industrija

ISSN

0367-598X

e-ISSN

2217-7426

Svazek periodika

74

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

RS - Srbská republika

Počet stran výsledku

8

Strana od-do

305-312

Kód UT WoS článku

000587789800003

EID výsledku v databázi Scopus

2-s2.0-85096926118