The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform
Martyn C. Lucas - One of the best experts on this subject based on the ideXlab platform.
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potential impacts of small scale Hydroelectric Power Generation on downstream moving lampreys
River Research and Applications, 2013Co-Authors: F. S. A. Bracken, Martyn C. LucasAbstract:Small-scale hydroPower is developing rapidly in many countries in response to policies of encouraging renewable energy and reducing reliance on fossil fuels. This rapid increase in the construction of Hydroelectric turbines provides a substantial risk to migrating biota, especially fish. Some turbines, such as the Archimedes screw design, are regarded as relatively friendly to fish but have not yet been assessed for their potential impacts on threatened lamprey species. To assess the risk of impingement and the patterns of movement by emigrating river lamprey Lampetra fluviatilis transformers and drifting larval ammocoetes at the site of an Archimedes screw turbine in north-east England, drift nets were set over the periods of January to June 2009 and November 2009 to May 2010. Drifting Lampetra sp. larvae were recorded in all sampling months, November to June, while emigrating lampreys were recorded in all months but June (93% captured between December and April), reflecting a higher period of impingement risk than expected. Night-time catches were 24- and 8-fold higher for transformers and larvae, respectively, than daytime catches. Catch per unit water volume data in different channel areas suggest that lamprey larvae behaved as passive particles within the river flow but that transformers selected areas of higher flow. Damage rates of lampreys passed through the screw were low (1.5%), suggesting minor impacts on downstream-moving larval and juvenile lampreys. However, the cumulative potential impacts of multiple hydroPower sites on downstream fish passage, including lampreys, should be considered by regulatory agencies when planning hydroPower development within catchments. Copyright © 2012 John Wiley & Sons, Ltd.
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POTENTIAL IMPACTS OF SMALL‐SCALE Hydroelectric Power Generation ON DOWNSTREAM MOVING LAMPREYS
River Research and Applications, 2012Co-Authors: F. S. A. Bracken, Martyn C. LucasAbstract:Small-scale hydroPower is developing rapidly in many countries in response to policies of encouraging renewable energy and reducing reliance on fossil fuels. This rapid increase in the construction of Hydroelectric turbines provides a substantial risk to migrating biota, especially fish. Some turbines, such as the Archimedes screw design, are regarded as relatively friendly to fish but have not yet been assessed for their potential impacts on threatened lamprey species. To assess the risk of impingement and the patterns of movement by emigrating river lamprey Lampetra fluviatilis transformers and drifting larval ammocoetes at the site of an Archimedes screw turbine in north-east England, drift nets were set over the periods of January to June 2009 and November 2009 to May 2010. Drifting Lampetra sp. larvae were recorded in all sampling months, November to June, while emigrating lampreys were recorded in all months but June (93% captured between December and April), reflecting a higher period of impingement risk than expected. Night-time catches were 24- and 8-fold higher for transformers and larvae, respectively, than daytime catches. Catch per unit water volume data in different channel areas suggest that lamprey larvae behaved as passive particles within the river flow but that transformers selected areas of higher flow. Damage rates of lampreys passed through the screw were low (1.5%), suggesting minor impacts on downstream-moving larval and juvenile lampreys. However, the cumulative potential impacts of multiple hydroPower sites on downstream fish passage, including lampreys, should be considered by regulatory agencies when planning hydroPower development within catchments. Copyright © 2012 John Wiley & Sons, Ltd.
F. S. A. Bracken - One of the best experts on this subject based on the ideXlab platform.
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potential impacts of small scale Hydroelectric Power Generation on downstream moving lampreys
River Research and Applications, 2013Co-Authors: F. S. A. Bracken, Martyn C. LucasAbstract:Small-scale hydroPower is developing rapidly in many countries in response to policies of encouraging renewable energy and reducing reliance on fossil fuels. This rapid increase in the construction of Hydroelectric turbines provides a substantial risk to migrating biota, especially fish. Some turbines, such as the Archimedes screw design, are regarded as relatively friendly to fish but have not yet been assessed for their potential impacts on threatened lamprey species. To assess the risk of impingement and the patterns of movement by emigrating river lamprey Lampetra fluviatilis transformers and drifting larval ammocoetes at the site of an Archimedes screw turbine in north-east England, drift nets were set over the periods of January to June 2009 and November 2009 to May 2010. Drifting Lampetra sp. larvae were recorded in all sampling months, November to June, while emigrating lampreys were recorded in all months but June (93% captured between December and April), reflecting a higher period of impingement risk than expected. Night-time catches were 24- and 8-fold higher for transformers and larvae, respectively, than daytime catches. Catch per unit water volume data in different channel areas suggest that lamprey larvae behaved as passive particles within the river flow but that transformers selected areas of higher flow. Damage rates of lampreys passed through the screw were low (1.5%), suggesting minor impacts on downstream-moving larval and juvenile lampreys. However, the cumulative potential impacts of multiple hydroPower sites on downstream fish passage, including lampreys, should be considered by regulatory agencies when planning hydroPower development within catchments. Copyright © 2012 John Wiley & Sons, Ltd.
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POTENTIAL IMPACTS OF SMALL‐SCALE Hydroelectric Power Generation ON DOWNSTREAM MOVING LAMPREYS
River Research and Applications, 2012Co-Authors: F. S. A. Bracken, Martyn C. LucasAbstract:Small-scale hydroPower is developing rapidly in many countries in response to policies of encouraging renewable energy and reducing reliance on fossil fuels. This rapid increase in the construction of Hydroelectric turbines provides a substantial risk to migrating biota, especially fish. Some turbines, such as the Archimedes screw design, are regarded as relatively friendly to fish but have not yet been assessed for their potential impacts on threatened lamprey species. To assess the risk of impingement and the patterns of movement by emigrating river lamprey Lampetra fluviatilis transformers and drifting larval ammocoetes at the site of an Archimedes screw turbine in north-east England, drift nets were set over the periods of January to June 2009 and November 2009 to May 2010. Drifting Lampetra sp. larvae were recorded in all sampling months, November to June, while emigrating lampreys were recorded in all months but June (93% captured between December and April), reflecting a higher period of impingement risk than expected. Night-time catches were 24- and 8-fold higher for transformers and larvae, respectively, than daytime catches. Catch per unit water volume data in different channel areas suggest that lamprey larvae behaved as passive particles within the river flow but that transformers selected areas of higher flow. Damage rates of lampreys passed through the screw were low (1.5%), suggesting minor impacts on downstream-moving larval and juvenile lampreys. However, the cumulative potential impacts of multiple hydroPower sites on downstream fish passage, including lampreys, should be considered by regulatory agencies when planning hydroPower development within catchments. Copyright © 2012 John Wiley & Sons, Ltd.
Renata Varfolomejeva - One of the best experts on this subject based on the ideXlab platform.
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a multi objective stochastic approach to Hydroelectric Power Generation scheduling
Power Systems Computation Conference, 2016Co-Authors: Antans Sauļus Sauhats, Roman Petrichenko, Karlis Baltputnis, Zane Broka, Renata VarfolomejevaAbstract:In this paper, we propose a novel stochastic approach to multi-objective optimization of Hydroelectric Power Generation short-term scheduling. Maximization of profit is chosen as the main objective with additional sub-objective—to reduce the number of startups and shutdowns of generating units. The random nature of future electricity prices and river water inflow is taken into account. We use an artificial neural network-based algorithm to forecast market prices and water inflow. Uncertainty modeling is introduced to represent the stochastic nature of parameters and to solve the short-term optimization problem of profit-based unit commitment. A case study is conducted on a real-world hydroPower plant to demonstrate the feasibility of the proposed algorithm by providing the Power Generation company with the day-ahead bidding strategy under market conditions and a Pareto optimal hourly dispatch schedule of the generating units.
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PSCC - A multi-objective stochastic approach to Hydroelectric Power Generation scheduling
2016 Power Systems Computation Conference (PSCC), 2016Co-Authors: Antans Sauļus Sauhats, Roman Petrichenko, Karlis Baltputnis, Zane Broka, Renata VarfolomejevaAbstract:In this paper, we propose a novel stochastic approach to multi-objective optimization of Hydroelectric Power Generation short-term scheduling. Maximization of profit is chosen as the main objective with additional sub-objective—to reduce the number of startups and shutdowns of generating units. The random nature of future electricity prices and river water inflow is taken into account. We use an artificial neural network-based algorithm to forecast market prices and water inflow. Uncertainty modeling is introduced to represent the stochastic nature of parameters and to solve the short-term optimization problem of profit-based unit commitment. A case study is conducted on a real-world hydroPower plant to demonstrate the feasibility of the proposed algorithm by providing the Power Generation company with the day-ahead bidding strategy under market conditions and a Pareto optimal hourly dispatch schedule of the generating units.
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A stochastic approach to Hydroelectric Power Generation planning in an electricity market
2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC), 2015Co-Authors: Antans Sauļus Sauhats, Roman Petrichenko, Renata Varfolomejeva, Jevgenijs KucajevsAbstract:The paper discusses the planning of Hydroelectric Power Generation. A stochastic optimization procedure is offered to solve the complex task of planning the operation of three Hydroelectric Power plants. The proposed stochastic optimization algorithm is based on time average revenue maximization, taking into account the random nature of the future energy prices and river water inflows. Random variables are predicted by using an algorithm based on artificial neural networks. For computing within the operational planning, the task is divided into three parts. First, middle-term planning is used to solve the water resources distribution task. The second and third parts are related to day-ahead operational and unit commitment planning; in those cases, nonlinear programming tools are used. A case study presents the results of electric Power Generation in the case of optimum water resource distribution in the storage basins of Hydroelectric Power plant's cascade. The paper proves the workability of the developed algorithm for maximizing the income value and is intended to enable and support improved planning and decision-making for electric Power producers.
Avi Efraty - One of the best experts on this subject based on the ideXlab platform.
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Closed circuit PRO series no 3: status and prospects for PRO Hydroelectric Power Generation from sea–river water like salinity gradients
Desalination and Water Treatment, 2015Co-Authors: Avi EfratyAbstract:AbstractThe present status and future prospects of pressure related osmosis (PRO) for Hydroelectric Power Generation from the most widespread salinity gradients of seawater and river water systems (SW–RW) are analyzed by a theoretical model in terms of the membrane, module, and method. The selected membrane in the model analysis comprises MP # 1 of the highest presently known permeability coefficient (5.81 Lmh/bar) with a projected peak Power density of 10 W/m2 at 13 bar. The performance of the referred MP # 1 membrane was ascertained in the context of the closed circuit PRO (CC-PRO) and conventional PRO methods at different HSF (high salinity feed or “draw” solution) to permeate flow ratio (δ), and percent permeate (α) in HSDF (high salinity diluted feed or diluted “draw” solution) with emphasis of the membrane Power density (PD) and the net electric Power density (NEPD) which takes into account the fraction of Power consumed by the auxiliary pumps. The theoretical CC-PRO simulation of a typical SW–RW sa...
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Closed circuit PRO series No 4: CC-PRO Hydroelectric Power Generation prospects from the Red Sea brine and Dead Sea salinity gradient
Desalination and Water Treatment, 2014Co-Authors: Avi EfratyAbstract:AbstractThe Red Sea (RS) to Dead Sea (DS) water transfer project in Jordan under the sponsorship of the World Bank is intended to stop the sea-level decline of the DS as well as for the desalination of RS water and for Hydroelectric Power Generation. Red Sea Brine (RSB ~7.13%) disposal to the DS (~34%) creates a salinity gradient of interest for PRO Hydroelectric Power Generation and the prospects of such an application are explored in the present study with the most advanced existing tools including a new Closed Circuit PRO technology (CC-PRO) of near absolute energy efficiency without need of ERD and a recent PRO membrane (HTI-TFC) of the highest reported strength to withstand applied pressure up to 48.3 bar. Power Generation prospects from RSB–DS using CC-PRO with HTI-TFC are assessed in the actual/ideal flux ratio (β) range 0.123–0.400 and High Salinity Feed (DS as draw solution) to permeation flow ratio (δ) range 1–25. The minimum β = 0.123 for said process is established from available PRO experimen...
Mohammad Reza Ahmadi - One of the best experts on this subject based on the ideXlab platform.
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A note on short-term hydro-thermal scheduling
Energy Conversion and Management, 2016Co-Authors: Ali Esmaeily, Fatima Raeisi, Abdollah Ahmadi, Mohammad Reza AhmadiAbstract:Abstract This study deals with the inaccuracies occurred in short-term hydrothermal scheduling using different methods published in Energy Conversion and Management journal. The reported solutions do not meet the Hydroelectric Power Generation limits. In this regard, the generated Power ought to be positive during all hours of scheduling, while the Hydroelectric Power Generation of plant 3 has negative amounts.
