Torque loss occurring on a Submerged impulse hydro turbine

29th IAHR Symposium on Hydraulic Machinery and Systems

Usami, Saki^1 ; Koyama, Hiroki^1 ; Azegami, Takuto^1 ; Katayama, Yusuke^2 ; Haneda, Yoshiaki^3 ; Iio, Shouichiro^1

Shinshu University, Nagano

380-8553, Japan^1

Kyushu University, Fukuoka

819-0395, Japan^2

National Institute of Technology, Nagano College, Nagano

381-0041, Japan^3

关键词: Drinking water pipes;    Environmental issues;    Impulse turbines;    Loss mechanisms;    Loss reduction;    Pressure reducing valves;    Small hydro power;    Turbine performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/240/4/042017/pdf
DOI  :  10.1088/1755-1315/240/4/042017

来源: IOP

【 摘 要 】

Small hydropower development is one of the best way for enhancement of energy security and good solution of global environmental issues. A new submerged impulse turbine has been developing for generation by replacing a pressure reducing valve in drinking water pipe lines. This study has been especially focused on torque loss on the turbine, but it is not fully understood the reason why the loss is occurred. The torque loss is serious problem for a submerged turbine performance. Thus the torque loss on the runner and a disk was measured. This study, therefore, focuses on the loss mechanisms and aims to reveal key parameters for the loss reduction. We measured and compared to the torque loss between a simple disk and the submerged impulse runner experimentally. In addition, we aimed to reduce the agitation loss with the runner blade.