Detail publikace

Posouzení vlivu specifických otáček na provoz čerpadla v turbínovém režimu

ŠTEFAN, D. HUDEC, M. ROSSI, M. NIGRO, A. RENZI, M. POCHYLÝ, F. BEZDÍČEK, J. RUDOLF, P.

Český název

Posouzení vlivu specifických otáček na provoz čerpadla v turbínovém režimu

Anglický název

Assessment of Specific Speed Influence on Pump-as-Turbine Operation

Typ

článek ve sborníku mimo WoS a Scopus

Jazyk

en

Originální abstrakt

Pumps operating in reverse mode, often named Pumpas-Turbines (PaTs), are gaining interest in small-scale hydropower applications. Due to low investment costs and simple design, this technology is considered a good alternative to typical turbines. PaTs are mainly used in energy recovery applications, especially in drinking water pipeline systems where they replace Pressure Reducing Valves (PRVs). This work presents the assessment of three different centrifugal pumps used in reverse mode. The goal is to compare the PaTs’ performance by investigating machines having different specific speeds, namely a pump with very low specific speed nq = 9, a pump with a common value of specific speed nq = 35, and a pump with relatively high specific speed nq = 90. Measurements, as well as results from CFD simulations, are presented to verify the usability of each of the pump, and quantify the effect of specific speed on PaTs’ performance in reverse mode operation. In particular, not only integral values and characteristic curves are compared, but also flow patterns at different operating points, which are origin of hydraulic losses and other important features (e.g., the shift of the Best Efficiency Point (BEP) for pump and turbine modes) are presented and discussed.

Anglický abstrakt

Pumps operating in reverse mode, often named Pumpas-Turbines (PaTs), are gaining interest in small-scale hydropower applications. Due to low investment costs and simple design, this technology is considered a good alternative to typical turbines. PaTs are mainly used in energy recovery applications, especially in drinking water pipeline systems where they replace Pressure Reducing Valves (PRVs). This work presents the assessment of three different centrifugal pumps used in reverse mode. The goal is to compare the PaTs’ performance by investigating machines having different specific speeds, namely a pump with very low specific speed nq = 9, a pump with a common value of specific speed nq = 35, and a pump with relatively high specific speed nq = 90. Measurements, as well as results from CFD simulations, are presented to verify the usability of each of the pump, and quantify the effect of specific speed on PaTs’ performance in reverse mode operation. In particular, not only integral values and characteristic curves are compared, but also flow patterns at different operating points, which are origin of hydraulic losses and other important features (e.g., the shift of the Best Efficiency Point (BEP) for pump and turbine modes) are presented and discussed.

Klíčová slova anglicky

pump as turbine; specific speed; energy recovery

Vydáno

09.11.2022

Nakladatel

TU Wien

Místo

Wien

Kniha

Proceedings of conference ViennaHydro 2022

Strany od–do

1–12

Počet stran

12

BIBTEX


@inproceedings{BUT182728,
  author="David {Štefan} and Martin {Hudec} and Mosé {Rossi} and Alessandra {Nigro} and Massimiliano {Renzi} and František {Pochylý} and Jiří {Bezdíček} and Pavel {Rudolf},
  title="Assessment of Specific Speed Influence on Pump-as-Turbine Operation",
  booktitle="Proceedings of  conference ViennaHydro 2022",
  year="2022",
  month="November",
  pages="1--12",
  publisher="TU Wien",
  address="Wien"
}