Publication detail

Valve exploiting the principle of a side channel turbine

JANDOUREK, P. FIALOVÁ, S. POCHYLÝ, F. SOUKUP, L.

Original Title

Valve exploiting the principle of a side channel turbine

Type

conference proceedings

Language

English

Original Abstract

The presented article deals with a side channel turbine, which can be used as a suitable substitute for a pressure reducing valve. Reducing valves are a source of hydraulic losses. The aim is to replace them by a side channel turbine. With that in mind, hydraulic losses can be replaced by a production of electrical energy at comparable characteristics of the valve and the turbine. The basis for the design is the loss characteristics of the valve. Thereby creating a kind of turbine valve with speed-controlled flow in dependence of runner revolution. The side channel turbine falls into the category of reaction turbines. They are intended for small discharges and medium heads. The working area is within the specific speed ns = 2 - 30 min-1. The turbine can only process a part of the head. The main disadvantage is low efficiency, which is usually within the range of 20 to 50%. These machines find their use due to the fact that reaching specific speed ns < 35 min-1 with Francis’ turbines at high efficiency is quite problematic. Under these circumstances, a counteracting vortex starts to occur in the channels between the blades of the impeller. This causes the decrease of efficiency which can even get below 40%. In a situation like this, it might be worth using side channel turbines as they have higher efficiency, than the low specific speed Francis’ turbines. Turbines are useful for regulation due to their flat curve of efficiency in the area of optimum point and linear dependency of flow on revolutions. The use of magnetorheological fluids for the increase in hydraulic efficiency of the swirl turbine is also mentioned.

Keywords

Turbine valve, Side channel turbine, Part recuperation

Authors

JANDOUREK, P.; FIALOVÁ, S.; POCHYLÝ, F.; SOUKUP, L.

Released

4. 7. 2016

Publisher

SHF

Location

Paris

ISBN

979-10-93567-11-2

Book

Book of Abstracts

Edition

1

Edition number

1

Pages from

194

Pages to

194

Pages count

212

BibTex

@proceedings{BUT127124,
  editor="Pavel {Jandourek} and Simona {Fialová} and František {Pochylý} and Lubomír {Soukup}",
  title="Valve exploiting the principle of a side channel turbine",
  year="2016",
  series="1",
  number="1",
  pages="194--194",
  publisher="SHF",
  address="Paris",
  isbn="979-10-93567-11-2"
}