scholarly journals Silt Erosion in Hydro Turbines and Status of Small Hydropower in India - A Review

2018 ◽  
Vol 8 (2) ◽  
pp. 315-322
Author(s):  
Robin Thakur et al., Robin Thakur et al., ◽  
Keyword(s):  
Small Hydropower ◽  
Silt Erosion ◽  
Hydro Turbines

A review on silt erosion in hydro turbines

2008 ◽  
Vol 12 (7) ◽  
pp. 1974-1987 ◽  
Author(s):  
Mamata Kumari Padhy ◽  
R.P. Saini
Keyword(s):  
Silt Erosion ◽  
Hydro Turbines

Performance and Internal Flow of Contra-Rotating Small Hydro Turbine

2013 ◽  
Author(s):  
Toru Shigemitsu ◽  
Junichiro Fukutomi ◽  
Ryosuke Sonohata
Keyword(s):  
Flow Condition ◽  
Alternative Energy ◽  
High Performance ◽  
Internal Flow ◽  
Stable Operation ◽  
Small Hydropower ◽  
Flow Passage ◽  
Hydro Turbine ◽  
Experimental Apparatus ◽  
Hydro Turbines

Small hydropower generation is one of important alternative energy, and potential of small hydropower is great. Efficiency of small hydro turbines is lower than that of large one, and these small hydro turbine’s common problems are out of operation by foreign materials. Then, there are demands for small hydro turbines to keep high performance and wide flow passage. Therefore, we adopted contra-rotating rotors, which can be expected to achieve high performance and enable to use low-solidity rotors with wide flow passage, in order to accomplish high performance and stable operation. Final goal of this study is development of a small hydro turbine like electrical goods, which has high portability and makes an effective use of unused small hydro power energy source. In this research, experimental apparatus of the contra-rotating small hydro turbine with 60mm casing diameter was manufactured and performance of it was investigated by an experiment. Efficiency of the contra-rotating small hydro turbine was high in pico-hydro turbine and high efficiency could be kept in wide flow rate range. Internal flow condition, which was difficult to measure experimentally, was shown by the numerical flow analysis. Further, influence of spokes to support the rotor was clarified. Then, a relation between the performance and internal flow condition was considered by the experimental and numerical analysis results.

Experimental and Computational Investigation of the Drag of a Towed Hydropower Turbine

2013 ◽  
Author(s):  
G. T. Bryan ◽  
M. F. Platzer ◽  
Y. W. Kwon
Keyword(s):  
Dynamics Analysis ◽  
Crucial Aspect ◽  
Computational Investigation ◽  
Small Hydropower ◽  
Towing Tank ◽  
Computational Fluid Dynamics Analysis ◽  
Production Of Hydrogen ◽  
Speed Range ◽  
Hydro Turbines ◽  
Good Agreement

In a previous paper (IMECE2011-62311) Platzer et al proposed the use of sailing ships equipped with hydropower turbines to generate the electricity required for the production of hydrogen and oxygen by means of electrolysis which then is brought back to land for re-conversion into electric power. A crucial aspect of the practicality of this “energy ship” concept is the drag of the hydro-turbines. Since little information exists about the drag of towed hydropower generators in this paper the drag of a small hydropower turbine was investigated in a towing tank. Drag measurements are presented for a speed range between 0.6 and 1.8 m/s. Comparisons with available data and the predictions by a computational fluid dynamics analysis show good agreement.

Low mortality rate in silver eels (Anguilla anguilla L.) passing through a small hydropower station

2017 ◽  
Vol 68 (11) ◽  
pp. 2081 ◽  
Author(s):  
Rafał Bernaś ◽  
Piotr Dçbowski ◽  
Michał Skóra ◽  
Grzegorz Radtke ◽  
Jacek Morzuch ◽  
...  
Keyword(s):  
Mortality Rate ◽  
Anguilla Anguilla ◽  
Francis Turbine ◽  
Small Hydropower ◽  
Regulated Rivers ◽  
Silver Eels ◽  
Pass Through ◽  
Hydropower Stations ◽  
Hydro Turbines ◽  
Significant Mortality

In many regulated rivers, silver eels (Anguilla anguilla L.) experience significant mortality as they pass through small hydropower stations (HPS) during their downstream migration. There has been a huge collapse in the recruitment of this species, primarily because of the destruction of river–ocean connectivity with overfishing. The direct mortality caused by small hydro turbines varies between different places and depends on many factors. The aim of the present study was to assess the mortality rate of silvers eels passing through a small HPS equipped with a Francis turbine in a small Pomeranian river using acoustic telemetry. During the experiment, no direct mortality occurred as a result of passage through the HPS turbine. However, three individuals were believed to have suffered from injuries or passage trauma.

Review on numerical techniques applied in impulse hydro turbines

2020 ◽  
Vol 159 ◽  
pp. 843-859 ◽  
Author(s):  
Sailesh Chitrakar ◽  
Bjørn Winther Solemslie ◽  
Hari Prasad Neopane ◽  
Ole Gunnar Dahlhaug
Keyword(s):  
Numerical Techniques ◽  
Hydro Turbines
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