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Combining construction and renovation works to increase techno-economic feasibility of very low head run of river hydro power
Published in Wim Uijttewaal, Mário J. Franca, Daniel Valero, Victor Chavarrias, Clàudia Ylla Arbós, Ralph Schielen, Alessandra Crosato, River Flow 2020, 2020
S.R. van Erp, J.D. Bricker, P. Buijs, H.G. Voortman, M. Marence
The last considered alternative is the Archimedes Screw Turbine (AST). Near Sint-Michielsgestel such a turbine was successfully implemented to produce low-head hydro-power in a retro-fit location (Marence, Ingabire, & Taks, 2016). ASTs have a lower efficiency than Kaplan turbines, about 80% versus 90-95%. To utilise a similar discharge as the Kaplan turbines, many more ASTs are required, which means that investment costs can be reduced due to design repetition. This makes the choice of the amount of turbines quite important, because having too many can reduce the capacity factor significantly, as can be seen in Table 3. For the economic performance having a capacity factor of about 20 to 28% is required to even repay the investment costs.
The impulse wheel as hydropower converter for irrigation systems
Published in ISH Journal of Hydraulic Engineering, 2023
Gerald Müller, Hannah Williams, Kieran Atkinson, Rory Fleminger, Alexander Goodwin, Natasha Ann Harris
In the 19th Century, several types of waterwheels were developed for head differences of 0.5 to 2.5 m and flow rates of up to 6 m3/s, most notably the Zuppinger and Sagebien wheels (Quaranta and Muller 2018). These wheels have efficiencies of up to 82%, but they require a weir type inflow detail which in the case of a ramp in an irrigation canal, would make a large inflow structure and a bypass channel necessary. The large diameters of these wheels of 7 to 9 m increases costs further. The Archimedes Screw Turbine (AST), an Archimedes screw working in reverse as a hydropower converter, has recently gained popularity due to its simplicity, the high efficiency of more than 80% at full load and their cost advantages, YoosefDoost and Lubitz (2020). AST installations in irrigation canals would however require a bypass channel and control elements, which increases the costs considerably.
Feasibility analysis for conversion of existing traditional watermills in Western Himalayan region of India to micro-hydropower plants using a low head Archimedes screw turbine for rural electrification
Published in International Journal of Ambient Energy, 2022
Kamal Kashyap, Robin Thakur, Raj Kumar, Sunil Kumar
Lastly, it is critical to recognise the operational capability of the watermills utilising the Archimedes screw turbine. The operational capability of the watermills utilised, as hydro plant will be dependent on various elements. To decide the operational potential, it is significant that each one of the variables is considered and at exactly that point based on these elements operational potential is determined. Factors, for example, route condition of water, availability to the roads, state of the watermills and in conclusion, their good ways from the closest market will be considered (Kashyap et al. 2020a). All these variables were considered to decide whether building up a watermill would be a cost feasible and would have the option to offer a higher return on expenditure. The path of the waterway or stream should be, so the progression of water is nonstop with no obstruction. The water supply should be constant at a sufficient stream for the generation of power (Piper et al. 2018). Development or establishment of Archimedes screw turbine will be a lot simpler at watermills that are nearer to the roads as raw material, hardware, or some other necessities for the development of the hydropower plants can be effectively satisfied through road availability (Zhang et al. 2018). Watermills that are more distant from the street should confront certain trouble as all material would be required to move from the street to that area which can be difficult (Sritram and Suntivarakorn 2017). Watermills conditions can likewise be a significant factor in cost estimation as plants that are in better conditions will require less cost of development in comparison with the watermills that are not operational.