Wasserkraft als Sanierungsmotor für hydromorphologische Belastungen?

Lashofer, Alois; Hawle, Werner; Cassidy, T. A.; Pucher, Michael; Fürst, Jutta; Pelikan, Bernhard

doi:10.1007/978-3-658-00996-0_54

Cited by 5 publications

(19 citation statements)

References 1 publication

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“…In this way, the AST is a variation of the ancient Archimedes screw pump. However, ASTs have only been in use since the 1990s [28]. ASTs offer a clean and renewable source of energy and can be safer than other types of hydroelectric turbines for wildlife and especially fish [29].…”

Section: Archimedes Screw Turbinementioning

confidence: 99%

“…The first AST was installed in the 1990s [25]. Since then, several hundred ASTs have been installed to generate electricity [28]. Almost all of these have been built in Europe.…”

Section: Archimedes Screw Turbinementioning

confidence: 99%

“…Archimedes Screw <10 [33,40] <10 [33,45] Efficiency range between 60% and 80% and remains high even as available head approaches zero. Produce up to 355 kW [46] of power [28]. Practical even in 50 *-1000 [12] <50 [35] A high-pressure jet of water is directed at bucket-shaped blades and nearly all of the flow energy to be converted to rotational mechanical energy [37].…”

Section: Quasistatic Pressurementioning

confidence: 99%

“…Archimedes Screw <10 [33,40] <10 [33,45] Efficiency range between 60% and 80% and remains high even as available head approaches zero. Produce up to 355 kW [46] of power [28]. Practical even in 50 **-250 [39] <10 [40] A modification of a Pelton that incoming water jet is directed at an angle of 20 degrees to the buckets.…”

Section: Quasistatic Pressurementioning

confidence: 99%

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Archimedes Screw Turbines: A Sustainable Development Solution for Green and Renewable Energy Generation—A Review of Potential and Design Procedures

YoosefDoost

Lubitz

2020

Sustainability

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Archimedes Screws Turbines (ASTs) are a new form of small hydroelectric powerplant that can be applied even in low head sites. ASTs offer a clean and renewable source of energy and are safer for wildlife and especially fish than other hydro generation options. As with other energy solutions, ASTs are not a global solution for all situations. However, in terms of sustainable development, ASTs can offer many economic, social, and environmental advantages that make them an important option for providing sustainable hydropower development. Archimedes screws can operate in low water heads (less than about 5 m) and a range of flow rates with practical efficiencies of 60% to 80% and can generate up to 355 kW of power. ASTs increase the number of suitable sites where it is possible to develop sustainable hydropower, including in undeveloped, hard to access regions and small communities. At many low head sites, ASTs may be more cost-effective, with lower installation and operating costs than alternative hydropower systems. An AST may also reduce the disturbance of natural sedimentation and erosion processes and have smaller impacts on fish and other fauna. ASTs can often be retrofit to existing unpowered dams or weirs, providing new hydropower capacity for very little marginal environmental impact. This review outlines the characteristics of ASTs, then discusses and analyzes how they could benefit the sustainability of hydropower development.

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Section: Archimedes Screw Turbinementioning

confidence: 99%

“…The first AST was installed in the 1990s [25]. Since then, several hundred ASTs have been installed to generate electricity [28]. Almost all of these have been built in Europe.…”

Section: Archimedes Screw Turbinementioning

confidence: 99%

Section: Quasistatic Pressurementioning

confidence: 99%

“…Archimedes Screw <10 [33,40] <10 [33,45] Efficiency range between 60% and 80% and remains high even as available head approaches zero. Produce up to 355 kW [46] of power [28]. Practical even in 50 **-250 [39] <10 [40] A modification of a Pelton that incoming water jet is directed at an angle of 20 degrees to the buckets.…”

Section: Quasistatic Pressurementioning

confidence: 99%

See 2 more Smart Citations

Archimedes Screw Turbines: A Sustainable Development Solution for Green and Renewable Energy Generation—A Review of Potential and Design Procedures

YoosefDoost

Lubitz

2020

Sustainability

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“…For example, in the United States, the total number of migration barriers comprises 74,921 dams >2 m high (Graf, ) and more than two million smaller dams (Poff & Hart, ). In Austrian rivers, 55,135 small dams and weirs were reported (Lashofer et al, ), in German rivers, some 200,000 transverse structures (Fehér et al, ). Other recent counts of river fragmentation in Europe provided by Fehér et al () comprise more than 60,000 dams, weirs, and mills on French rivers, over 100,000 artificial barriers with a height >0.5 m in Swiss rivers, 779 barriers on the 3,000 km long priority network of rivers in Belgium, 6,023 barriers >1 m in height in Czech rivers, and 1,688 continuity interruptions in the River Danube.…”

Section: Introductionmentioning

confidence: 99%

Fish passes design discharge requirements for successful operation

Wolter

Schomaker

2019

River Research & Apps

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Longitudinal connectivity is one of the prime issues addressed in river restoration our days. At the same time, mitigation of climate change impacts by modes of renewable energy increasingly puts pressure on the remaining free flowing river stretches for hydroelectricity production. At the site level, this trade‐off manifests in the negotiation of water for upstream and downstream fish passage versus losses for hydroelectricity production. This study has compiled and analysed 193 studies evaluating fish passes designed to provide upstream migration for all species and size classes of the respective river system. The overall assessment of functioning and discharge dedicated to fish pass maintenance, site, and river characters were provided by the studies. The main objective here was deriving general guidance for the minimum amount of water needed for fully functioning upstream fish passage in relation to river size. There was a significant correlation between functionality and design discharge of a fish pass. Fully functioning fish passes (N = 92) had median design discharge of 5% of the mean average discharge of the river, restrictedly functioning of 1.1% and not functioning of 0.22%. A power model could be derived of design discharge needs in relation to river discharge, which is inversely related to river size. In large rivers, a rather small share of mean discharge is sufficient, whereas in small rivers, it cannot be further downscaled due to dimensions. This model might provide first guidance in adjusting needs for both hydroelectricity generation and fish conservation in regulated rivers.

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Effects of Parameter Scaling on Archimedes Screw Generator Performance

Simmons,

Dellinger,

Lubitz

2023

Energies

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Archimedes screws are an ancient pumping technology that has more recently found use as a technology for hydropower generation. Currently, the literature is lacking reliable data, performance predicting models, and design guidelines. Most performance models presented in the literature are theoretical or were developed and evaluated using laboratory-scale data. This paper presents novel experimental and numerical simulation data to the literature from screw generators with a wide range of sizes (laboratory to full-scale powerplant scale) and orientations. The data suggest that the components of power production (pressure-driven and viscous/friction) scale differently depending on system size, configuration, and operating conditions. So, for the robust validation of models and the development of reliable design guidance, data from a wide range of sizes and configurations are crucial. The paper presents data collected from laboratory experiments, field measurements from operating powerplants, and data from numerical simulations. The numerical simulations were evaluated for accuracy with experimental data, then used to collect performance data from a wide range of screw geometries and scales. The length-scale (diameter), number of blades, fill height of water, inclination angle, and surface roughness were all varied. The data gathered in these experiments were analyzed and used to develop back-of-the-envelope estimations for the effect of each parameter on overall system performance; the relationships are intended to serve as a useful reference for designers, though they should not be used in lieu of a design model. The length-scale and number of blades were related to power in a way that could be reasonably approximated with a constant value. The fill height, inclination angle, and surface roughness were related to power in a way that could be approximated reasonably with first-order polynomial fits. Altogether, this paper presents much-needed, novel data to the literature; the data are integral for future model development and evaluation.

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Wasserkraft als Sanierungsmotor für hydromorphologische Belastungen?

Cited by 5 publications

References 1 publication

Archimedes Screw Turbines: A Sustainable Development Solution for Green and Renewable Energy Generation—A Review of Potential and Design Procedures

Archimedes Screw Turbines: A Sustainable Development Solution for Green and Renewable Energy Generation—A Review of Potential and Design Procedures

Fish passes design discharge requirements for successful operation

Effects of Parameter Scaling on Archimedes Screw Generator Performance

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