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Pumps as Turbines : A users guide - Arthur B. Williams

Pumps as Turbines

A users guide

Paperback

Published: 1st January 2004
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This second edition of the classic title on practical energy provision for isolated houses and remote locations has now been updated with a new chapter. Pumps as Turbine is a practical handbook for engineers and technicians involved in designing and installing small water-power schemes. It concerns the use of standard pump units as a low-cost alternative to conventional turbines to provide stand-alone electricity generation for isolated houses and remote communities. This second edition has been updated and extended to include a case study from a recent scheme installed in collaboration with ITDG Kenya. The pump selection process is described through this step-by-step example, where the site head would have been too low for a Pelton turbine. The case study demonstrates that now, possibly more than ever before, the use of pumps as turbines offers a reliable, low-cost option for rural electrification. Arthur Williams has been involved in micro-hydro research and development since 1987. While completing his PhD he worked with ITDG to set up successful pump-as-turbine demonstration schemes in the UK and Pakistan. He is now a senior lecturer at the Nottingham Trent University where he continues to work on micro- and pico-hydro power.

Forewordp. v
Acknowledgementsp. vi
Introductionp. vii
Diagram of Pump Componentsp. x
Applications for pumps as turbinesp. 1
Why use a pump as a turbine?p. 2
Using a direct drive pump as turbinep. 2
Suitable range of site heads and flowsp. 3
Overcoming the limitations of using a pump as turbinep. 6
Choice of pump typep. 8
Pump types and suitabilityp. 8
Choice of pump qualityp. 11
Choice of pump seal typep. 13
Choice of pump speedp. 14
Understanding pump sizesp. 14
Pump and turbine performance curvesp. 16
Understanding pump as pump performance curvesp. 16
Obtaining the best efficiency point with limited datap. 20
Understanding pump as turbine performance curvesp. 20
Design of the civil worksp. 23
Intake requirementsp. 23
Design of penstockp. 24
Valvesp. 26
Pump as turbine outletp. 27
Design of the electrical systemp. 28
Choice of generator type and number of phasesp. 28
Generator speedsp. 29
Control of the electrical outputp. 31
Selecting a pump as turbine for a particular sitep. 33
Matching a pump as turbine to site conditionsp. 33
Test procedurep. 36
Checking generator power outputp. 38
Operation of a pump as turbinep. 40
Operation of a pump as turbine at sitep. 40
Adjustments to a pump as turbine after installationp. 43
Scheme case studiesp. 45
The civil worksp. 46
Selecting the pumpp. 47
Specifying the generatorp. 49
Installation, testing and modificationp. 51
Case study in Karnataka, Indiap. 52
Appendices
Pump as turbine operation at reduced flowp. 55
Parallel operation of pumps as turbinesp. 56
Syphon intake for intermittent operationp. 59
Typical efficiencies of induction motorsp. 60
Unit conversion for head and flowp. 61
Estimating pump performance from physical measurementsp. 62
Calculating safe wall thickness for steel pipep. 65
Selecting penstock diameter and calculating head lossp. 66
Further Readingp. 68
Indexp. 69
Table of Contents provided by Ingram. All Rights Reserved.

ISBN: 9781853395673
ISBN-10: 1853395676
Audience: Professional
Format: Paperback
Language: English
Number Of Pages: 80
Published: 1st January 2004
Publisher: ITDG Publishing
Country of Publication: GB
Dimensions (cm): 21.59 x 14.61  x 5.08
Weight (kg): 0.14
Edition Number: 2
Edition Type: Revised