TY - GEN
T1 - Effect of Blades Number on Undershot Waterwheel Performance with Variable Inlet Velocity
AU - Wariito,
AU - Adanta, Dendy
AU - Arifianto, Satrio Adi
AU - Nasution, Sanjaya Bs
AU - Budiarso,
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/11/8
Y1 - 2018/11/8
N2 - 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.
AB - 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.
KW - Pico hydro
KW - blade
KW - reaction turbine
KW - undershot waterwheel
UR - http://www.scopus.com/inward/record.url?scp=85058544911&partnerID=8YFLogxK
U2 - 10.1109/ICSTC.2018.8528714
DO - 10.1109/ICSTC.2018.8528714
M3 - Conference contribution
AN - SCOPUS:85058544911
T3 - Proceedings - 2018 4th International Conference on Science and Technology, ICST 2018
BT - Proceedings - 2018 4th International Conference on Science and Technology, ICST 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 4th International Conference on Science and Technology, ICST 2018
Y2 - 7 August 2018 through 8 August 2018
ER -