Efficiency Comparison of Horizontal Low Head Spiral Turbine for Electrical Energy Production


  • Wiroon Monatrakul Faculty of Engineering, Khon Kaen University
  • Ratchaphon Suntivarakorn Faculty of Engineering, Khon Kaen University
  • Jarinee Jongpluempiti Faculty of Engineering and Technology, Rajamangala University of Technology Isan, Nakhon Ratchasima
  • Ponthep Vengsungnle Faculty of Engineering and Technology, Rajamangala University of Technology Isan, Nakhon Ratchasima


Horizontal Spiral Turbine, Electric Energy Production, Turbine Efficiency


This research aims to design and develop a compact generator system using horizontal spiral water turbines which can effectively gather waste energy from low flow rate water current without potential differences. The basic spiral turbine design was carried out through Arc-length Function (helix equation) to obtain spiral turbine prototypes for Laboratory testing. They had three spiral blades with tilt angles of 15, 18, 21, and 30 degrees. There were tested in-line flow tests with flow rates variations of 1.0, 1.25, 1.50, 1.75, and 2.00 m/s. The results revealed that the three spiral water turbines with 21 degrees blade tilt had the most RPM, torque and efficiency. This model could produce 457.09 RPM, 2.12 N.m of torque, and with 38.10 % efficiency at 2 m/s water flow rate generating 24.2 W of electricity. The study results showed potential development of the system and its enhancements to achieve better quality in the future.


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บทความวิจัย (Research article)