SciELO - Scientific Electronic Library Online

 
vol.20 número4Determination of regional emission factors for the power sector in Southern Africa índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Articulo

Indicadores

Links relacionados

  • En proceso de indezaciónCitado por Google
  • En proceso de indezaciónSimilares en Google

Compartir


Journal of Energy in Southern Africa

versión On-line ISSN 2413-3051
versión impresa ISSN 1021-447X

J. energy South. Afr. vol.20 no.4 Cape Town  2009

 

An efficiency assessment analysis of a modified gravitational Pelton-wheel turbine

 

 

Raj Kumar Kapooria

National Institute of Technology Kurukshetra, India and Faculty Mechanical Workshops Affiliated M. D. University Rohtak, India

 

 


ABSTRACT

A Pelton-wheel impulse turbine is a hydro mechanical energy conversion device which converts gravitational energy of elevated water into mechanical work. This mechanical work is converted into electrical energy by means of running an electrical generator. The kinetic energy of the Water-jet is directed tangentially at the buckets of a Pelton-wheel. The Water-jet strikes on each bucket's convex profile splitter and get split into two halves. Each half is turned backwards, almost through 180° relative to the bucket on a horizontal plane. Practically this angle may vary between 165° to 170°. Normally all the jet energy is used in propelling the rim of the bucket wheel. Invariably some jet water misses the bucket and passes onto the tail race without doing any useful work. This hydro device is a good source of hydro-electrical energy conversion for a high water head. The present work in this research paper deals with some advanced modifications in the conventional Pelton-wheel so that it can be used for low-head and heavy-discharge applications. Both kinetic and potential energy of the water source is consumed by the runner wheel. Considerable gravitational effect of the water jet is exploited by means of some modifications in a conventional Pelton-wheel. A comparatively heavy generator can be run by this modified Pelton-wheel turbine under low-head and heavy-discharge conditions. The modified features provide enough promising opportunities to use this turbine for Mini and Micro hydro power plants.

Keywords: efficiency, gravitation, hydro, impulse, jet-propulsion, kinetic-head, Pelton-wheel efficiency, potential-head, torque, water head, water-jet


 

 

Full text available only in PDF format.

 

 

References

Victor L. Streeter and E. Benjamin Wylie (1981), Fluid Mechanics, McGraw-Hill Book Company New York.         [ Links ]

Irving H. Shames (1992), Mechanics of Fluids, McGraw-Hill International Edition.         [ Links ]

Robert L. Daugherty, Joseph B. Franzini, E. John Finnemore (1989), Fluid Mechanics with Engineering Applications, McGraw-Hill Book Company, New York.         [ Links ]

David Halliday, Robert Resnick and Jearl Walker (2004), Fundamental of Physics (Sixth Edition), John Wiley & Sons, Inc., New York.         [ Links ]

Hugh D. Young, and Roger A. Freedman (1998), University Physics (Ninth Edition), Addison Wesley Longman, Inc., New York, 1998.         [ Links ]

R. K. Bansal (2002), Fluid Mechanics and Hydraulic Machines, Laxmi Publications, New Delhi.         [ Links ]

 

 

Received 27 April 2009
Revised 9 September 2009