scholarly journals Design and Optimization of a Turbine Intake Structure

10.14311/720 ◽  
2005 ◽  
Vol 45 (3) ◽  
Author(s):  
P. Fošumpaur ◽  
F. Čihák
Keyword(s):  
Power Plant ◽  
Optimal Design ◽  
Plant Location ◽  
Hydropower Plant ◽  
Total Efficiency ◽  
Design And Optimization ◽  
Hydropower Plants ◽  
Intake Structure ◽  
Run Of River

The appropriate design of the turbine intake structure of a hydropower plant is based on assumptions about its suitable function, and the design will increase the total efficiency of operation. This paper deals with optimal design of the turbine structure of run-of-river hydropower plants. The study focuses mainly on optimization of the hydropower plant location with respect to the original river banks, and on the optimal design of a separating pier between the weir and the power plant. The optimal design of the turbine intake was determined with the use of 2-D mathematical modelling. A case study is performed for the optimal design of a turbine intake structure on the Nemen river in Belarus. 

scholarly journals Performance Evaluation of Runoff River Type Hydropower Plants Operating in Nepal: A Case Study of Nepal Electricity Authority

2014 ◽  
Vol 10 (1) ◽  
pp. 104-120
Author(s):  
Sandeep Joshi ◽  
Rajendra Shrestha
Keyword(s):  
Performance Evaluation ◽  
Power Plant ◽  
Decision Maker ◽  
Power Plants ◽  
Hydropower Plant ◽  
Operation And Maintenance ◽  
Hydropower Plants ◽  
Maintenance Practice ◽  
River Type

Every power plant undergoes repair and maintenance which reduces the performance of the power plants as their condition undergoes periodic deterioration. To rectify the situation of aging and deterioration, timely evaluation of existing power plants is a must. Such that the evaluation will enable the decision maker to make decision regarding the present operation and maintenance practice: the need for modification of the practice or need to undergo rehabilitation in order to operate existing plants in a more efficient and effective way. Performance evaluation of a hydropower plant is performed .on the basis of various performance indicators.DOI: http://dx.doi.org/10.3126/jie.v10i1.10886Journal of the Institute of Engineering, Vol. 10, No. 1, 2014 pp. 104–120

scholarly journals Investigation of climate change impacts on hydropower generation: the case of a run-of-river small hydropower plant in North Western Greece

2021 ◽  
Vol 899 (1) ◽  
pp. 012026
Author(s):  
C Skoulikaris ◽  
K Kasimis
Keyword(s):  
Climate Change ◽  
Climate Models ◽  
Regional Climate ◽  
Climate Change Impacts ◽  
Regional Climate Models ◽  
Hydropower Plant ◽  
Small Hydropower ◽  
Hydropower Plants ◽  
Run Of River

Abstract Services and uses arising from surface water‘s availability, such as hydropower production, are bound to be affected by climate change. The object of the research is to evaluate climate change impacts on energy generation produced by run-of-river small hydropower plants with the use of future river discharges derived from two up-to-date Regional Climate Models. For doing so, the hydropower simulation model HEC-ResSim, calibrated and validated over real power data, was used to simulate the generated energy in the two future periods of 2031-2060 and 2071-2100. The future river discharges in the case study area are derived from the hydrological model E-HYPE that uses as forcing the climatic variables of the CSC-REMO2009-MPI-ESM-LR and KNMI-RACMO22E-EC-EARTH climate models under two Representative Concentration Pathways, namely RCP4.5 and RCP8.5. The research outputs demonstrate a decrease of the generated energy varying from 2.86% to 25.79% in comparison to the reference period of 1971-2000. However, in most of the simulated scenarios the decrease is less than 10.0%, while increased energy production is projected for one of the scenarios. Overall, it can be concluded that the case study run-of-river small hydropower plant will be marginally affected by climate change when the decrease of the relevant river discharges is up to 10-15%.

scholarly journals Dynamic Water-Level Regulation at Run-of-River Hydropower Plants to Increase Efficiency and Generation

Water ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 2983
Author(s):  
Stephan Heimerl ◽  
Niklas Schwiersch
Keyword(s):  
Water Level ◽  
Discharge Rate ◽  
Energy Transition ◽  
Operating Regime ◽  
Hydropower Plant ◽  
Optimization Approach ◽  
Hydropower Plants ◽  
Discharge Duration ◽  
Run Of River ◽  
Water Level Regulation

In times of the energy transition and the intensified expansion of renewable energy systems, this article presents an optimization approach for run-of-river power, i.e., dynamic water-level regulation. Its basic idea is to use river sections influenced by backwater more evenly via the operating regime of a hydropower plant. In contrast to conventional dam and weir water level management, the head of the reservoir is not shifted toward the weir while the discharge rate increases but is kept in position by temporarily raising the water level. This generates a greater head for higher discharge rates of an operating regime. As can be shown using an example, this has a direct effect on the performance and, in interaction with the discharge duration curve, on the annual work of the plant. The dynamic water-level regulation, thus, represents an environmentally compatible, energy-efficient optimization for run-of-river hydropower plants.

Analyzing the impact of intake structure on the flow at low pressure SHPP

2021 ◽  
Author(s):  
Lucia Bytčanková ◽  
Ján Rumann ◽  
Peter Dušička
Keyword(s):  
Velocity Distribution ◽  
Flow Velocity ◽  
Hydropower Plant ◽  
Small Hydropower ◽  
Hydropower Plants ◽  
Low Head ◽  
Structural Parts ◽  
Numerical Flow Modeling ◽  
Intake Structure ◽  
The Impact

AbstractThe structural parts of intake structures directly affect the flow velocity distribution in the turbine intake of small hydropower plants, where inhomogeneous flow leads to uneven load of the turbine units causing operational problems. A 2D numerical flow modeling was used for investigations of the flow in an intake structure of a low-head small hydropower plant. The effects of shape changes of the intake structure on the flow velocity distribution in the turbine intakes were investigated and assessed proving significant effect of the shapes of the intake structure on the flow homogeneity in turbine intakes.

scholarly journals Stability Analysis of a Run-of-River Diversion Hydropower Plant with Surge Tank and Spillway in the Head Pond

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
José Ignacio Sarasúa ◽  
Paz Elías ◽  
Guillermo Martínez-Lucas ◽  
Juan Ignacio Pérez-Díaz ◽  
José Román Wilhelmi ◽  
...  
Keyword(s):  
Stability Analysis ◽  
River Flow ◽  
Storage Capacity ◽  
Hydropower Plant ◽  
Pi Control ◽  
Surge Tank ◽  
River Diversion ◽  
Hydropower Plants ◽  
The Stability ◽  
Run Of River

Run-of-river hydropower plants usually lack significant storage capacity; therefore, the more adequate control strategy would consist of keeping a constant water level at the intake pond in order to harness the maximum amount of energy from the river flow or to reduce the surface flooded in the head pond. In this paper, a standard PI control system of a run-of-river diversion hydropower plant with surge tank and a spillway in the head pond that evacuates part of the river flow plant is studied. A stability analysis based on the Routh-Hurwitz criterion is carried out and a practical criterion for tuning the gains of the PI controller is proposed. Conclusions about the head pond and surge tank areas are drawn from the stability analysis. Finally, this criterion is applied to a real hydropower plant in design state; the importance of considering the spillway dimensions and turbine characteristic curves for adequate tuning of the controller gains is highlighted.

scholarly journals Evaluation of the flow velocity distribution in the intake structure of a small hydropower plant

2021 ◽  
Vol 1203 (2) ◽  
pp. 022102
Author(s):  
Lucia Bytčanková ◽  
Ján Rumann ◽  
Peter Dušička
Keyword(s):  
Velocity Distribution ◽  
Flow Velocity ◽  
Negative Impact ◽  
Current Situation ◽  
Hydropower Plant ◽  
Small Hydropower ◽  
Hydropower Plants ◽  
Intake Structure ◽  
Distribution Of Flow ◽  
Flow Velocities

Abstract Intake structures are an important part of small hydropower plants, which affect the water flow, turbine operation and total power of power plant. The flow quality is significantly influenced by the flow homogeneity in the intakes, as the inhomogeneous flow velocity distribution has a negative impact to the operation of the hydropower plants, such as uneven load on the mechanical parts which leads to decrease in efficiency and faster aging of turbine parts. The paper describes the flow assessment in the intake structures of a low-pressure small hydropower plant (the Stará Ľubovňa small hydropower plant) with respect to the flow homogeneity. The River2D, 2D numerical modelling software, has been used for evaluation of flow in the intakes. Flow simulations for the current state of operation have been modelled. In assessing the current situation of intake structure, scenarios were modelled. The boundary conditions were changed to approximate the various variants of hydropower plant operation. The simulations proved the negative impact of the construction solution for the flow conditions in the intakes. This appears mostly in profiles of coarse racks and screenings where is a significant unequal distribution of flow and significant deviation in flow velocities from the recommended values. The simulations results were evaluated in turbine intake profiles (profile of screenings), where the distribution of flow velocities was evaluated. The flow velocities in this profile were compared with the average flow velocity in the turbine intake profile. In order to optimize the velocity distribution in the intake structure, the modification of the intake shapes has been proposed. The subject of the proposal was to improve flow parameters. Simulations were created for the modification that were subsequently reviewed. The modification was compared to the current situation of the intakes.

scholarly journals Estimation of Run-of-River Hydropower Potential in the Myitnge River Basin

2020 ◽  
Vol 15 (3) ◽  
pp. 267-276 ◽  
Author(s):  
Kyu Kyu Thin ◽  
Win Win Zin ◽  
Zin Mar Lar Tin San ◽  
Akiyuki Kawasaki ◽  
Abdul Moiz ◽  
...  
Keyword(s):  
River Basin ◽  
Swat Model ◽  
Hydropower Plant ◽  
Small Hydropower ◽  
Planning Stage ◽  
Hydropower Plants ◽  
Hydropower Potential ◽  
Flow Duration Curves ◽  
Monthly Discharge ◽  
Run Of River

The need for electricity is rapidly increasing, especially in developing countries. There is vast hydropower potential existing globally that has not yet been explored. This could be the only solution to solve future global power shortage. Hydropower is a clean and renewable source of energy because it does not exploit the use of water. However, using the conventional approach to harness hydropower results in several challenges. It is difficult to identify suitable sites and assess site potential during the planning stage of hydropower projects. In this study, run-of-river hydropower potential for the Myitnge River Basin was estimated by intergrating a Geographic Information System (GIS) and Soil & Water Assessement Tool (SWAT) model. A GIS based tool was developed using Python to spot the potential locations of the hydropower plants. The hydrological model (SWAT) was designed in order to obtain the values of monthly discharge for all potential hydropwer sites. The flow duration curves at potential locations were developed and the design discharge for hydropower was identified. Forty-four run-of-river (ROR) type potential hydropower sites were identified by considering only the topographic factors. After simulation with SWAT model, twenty potential sites with a hydropower generation potential of 292 MW were identified. Currently, only one 790 MW Yeywa Hydropower Plant, which is the largest plant in Myanmar, exists in the Myitnge River Basin. The amount of estimated power generated from ROR may increase the existing power system of Myitnge Basin by 36%. This study will assist stakeholders in the energy sector to optimize the available resources to select appropiate sites for small hydropower plants with high power potential.

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