Effect of Blades Number on Undershot Waterwheel Performance with Variable Inlet Velocity

Wariito, Dendy Adanta, Satrio Adi Arifianto, Sanjaya Bs Nasution, Budiarso

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

12 Citations (Scopus)

Abstract

The undershot waterwheel is recommended to increase electrification ratio in remote areas of Indonesia due to its simple shape, which results in higher efficiency under low head conditions than other turbines. Using analytic and numerical methods, this study develops an equation to determine how many blades should be used and examines the effects of the kinetic energy of water on the energy conversion process to determine how the undershot waterwheel should be classified. Analytical methods were used to develop an equation to determine blades number, and numerical methods were used to verify the new equation. Variable inlet velocities of 1 m/s, 3 m/s, and 5 m/s and variations in blades number of 6, 7, 8, 9, and 10 blades were tested. From the analytical results, the recommended blades number is 8. Based on the numerical results, an 8-bladed waterwheel is most efficient with variable inlet velocities of 1 m/s (45.58% efficiency) and 5 m/s (13.84% efficiency). Analyzing the data using two-factor analysis of variance (ANOVA) without replication, it was determined that blades number effects output power, but inlet velocity does not. Thus, the proposed equation for determining the ideal blades number can be effectively used, but it still needs validation through experimentation. Furthermore, the kinetic energy of water was not found to have an effect on the energy conversion process in an undershot waterwheel, therefore, the undershot waterwheel should be classified as a reaction turbine.

Original languageEnglish
Title of host publicationProceedings - 2018 4th International Conference on Science and Technology, ICST 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538658130
DOIs
Publication statusPublished - 8 Nov 2018
Event4th International Conference on Science and Technology, ICST 2018 - Yogyakarta, Indonesia
Duration: 7 Aug 20188 Aug 2018

Publication series

NameProceedings - 2018 4th International Conference on Science and Technology, ICST 2018

Conference

Conference4th International Conference on Science and Technology, ICST 2018
Country/TerritoryIndonesia
CityYogyakarta
Period7/08/188/08/18

Keywords

  • Pico hydro
  • blade
  • reaction turbine
  • undershot waterwheel

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