CFD as a Decision Tool for Pumped Storage Hydropower Plant Flow Measurement Method

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00363887" target="_blank" >RIV/68407700:21110/23:00363887 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3390/w15040779" target="_blank" >https://doi.org/10.3390/w15040779</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/w15040779" target="_blank" >10.3390/w15040779</a>

Jazyk výsledku

angličtina

Název v původním jazyce

CFD as a Decision Tool for Pumped Storage Hydropower Plant Flow Measurement Method

Popis výsledku v původním jazyce

Suitable and accurate flow measurement in pumped storage hydropower plants (PSP) is a chal-lenging task due to the entirely different hydraulic behaviour of the penstock. This study pre-sents a novel approach to choosing a suitable flow measurement method and position. The focus is on the flow measurement in a specific short penstock of the largest peak-load hydropower plant, Orlík, after its transformation to a PSP. Our approach is based on three main pillars: nu-merical modelling of fluid flow (ANSYS CFX), standards, and scientific literature. First, the steady-state numerical model output for the current state is compared to historical measure-ments of point velocities using current meters and measured hydraulic losses in the penstock. Subsequently, for the planned conversion to the reversible Francis turbine, including shape modifications of the flow paths, a steady numerical simulation of the flow in the penstock was performed in both turbine and pump modes. By analysing the resulting pressure and velocity fields and comparing them to standards and scientific literature, the values of the uncertainty in the flow measurement were calculated. The outcome is a straightforward evaluation and com-parison of three main flow measurement methods: current meter, pressure–time, and ultrasonic transit time.

Název v anglickém jazyce

CFD as a Decision Tool for Pumped Storage Hydropower Plant Flow Measurement Method

Popis výsledku anglicky

Suitable and accurate flow measurement in pumped storage hydropower plants (PSP) is a chal-lenging task due to the entirely different hydraulic behaviour of the penstock. This study pre-sents a novel approach to choosing a suitable flow measurement method and position. The focus is on the flow measurement in a specific short penstock of the largest peak-load hydropower plant, Orlík, after its transformation to a PSP. Our approach is based on three main pillars: nu-merical modelling of fluid flow (ANSYS CFX), standards, and scientific literature. First, the steady-state numerical model output for the current state is compared to historical measure-ments of point velocities using current meters and measured hydraulic losses in the penstock. Subsequently, for the planned conversion to the reversible Francis turbine, including shape modifications of the flow paths, a steady numerical simulation of the flow in the penstock was performed in both turbine and pump modes. By analysing the resulting pressure and velocity fields and comparing them to standards and scientific literature, the values of the uncertainty in the flow measurement were calculated. The outcome is a straightforward evaluation and com-parison of three main flow measurement methods: current meter, pressure–time, and ultrasonic transit time.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Water

ISSN

2073-4441

e-ISSN

2073-4441

Svazek periodika

15

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

26

Strana od-do

1-26

Kód UT WoS článku

000942020100001

EID výsledku v databázi Scopus

2-s2.0-85149196678