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Design and performance evaluation of a pump-as-turbine micro-hydro test facility with incorporated inlet flow control

Citation

Giosio, DR and Henderson, AD and Walker, JM and Brandner, PA and Sargison, JE and Gautam, P, Design and performance evaluation of a pump-as-turbine micro-hydro test facility with incorporated inlet flow control, Renewable Energy, 78 pp. 1-6. ISSN 0960-1481 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 Elsevier

DOI: doi:10.1016/j.renene.2014.12.027

Abstract

In the context of micro-hydro power schemes the initial cost of conventional Francis turbine units is often prohibitive. As such there is growing interest in pump-as-turbine (PAT) technology offering a more cost effective, yet still highly efficient, power generating alternative, finding uses in remote area power supply and energy recovery systems. However, the implementation of a PAT is highly problematic in terms of predicting the installed best operating point coupled with poor off-design performance due to the fixed geometry and absence of inlet flow control. In the current work a micro-hydro test facility and turbine unit is developed utilising a commercially available pump impeller together with a customised housing for incorporation of inlet flow control. Working initially from established PAT theory, this paper presents the design and performance testing of a hydraulic turbine unit suitable for use in rural micro-hydro, and energy recovery installations. Maximum efficiency of the unit was found to be 79%, marginally higher than that of the parent pump, while the off-design efficiency offered considerable improvement over previously published data of traditional PAT systems. The design provides a cost effective power generator in comparison to small scale Francis turbines, while providing a greater operational range than traditional PAT units.

Item Details

Item Type:Refereed Article
Keywords:micro-hydro, hydro power, pump-as-turbine, power generation
Research Division:Engineering
Research Group:Mechanical Engineering
Research Field:Energy Generation, Conversion and Storage Engineering
Objective Division:Energy
Objective Group:Renewable Energy
Objective Field:Hydro-Electric Energy
Author:Giosio, DR (Dr Dean Giosio)
Author:Henderson, AD (Dr Alan Henderson)
Author:Walker, JM (Dr Jessica Walker)
Author:Brandner, PA (Associate Professor Paul Brandner)
ID Code:97971
Year Published:2015
Funding Support:Australian Research Council (LP110200244)
Deposited By:Engineering
Deposited On:2015-01-23
Last Modified:2016-02-25
Downloads:0

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