scholarly journals Retention basin with Golesti SHPP downstream dam for mitigating hydropeaking and producing green electricity

2019 ◽  
Vol 85 ◽  
pp. 06011
Author(s):  
Bogdan Popa ◽  
Florica Popa ◽  
Eliza Isabela Tică ◽  
Angela Neagoe ◽  
Mihaela Amalia Diminescu
Keyword(s):  
Peak Load ◽  
Hydropower Plant ◽  
Small Hydropower ◽  
Green Electricity ◽  
Flow Fluctuations ◽  
Hydropower Plants ◽  
Retention Basin ◽  
The Subject ◽  
Maximum Flows ◽  
Positive Effect

Hydropeaking is due to the intermittent operation of peak hydropower plants and leads to various and complex problems downstream. A solution to solve part of them is to provide the development scheme with a retention basin downstream the hydropower plant (HPP). The water used intermittently during the day / week to produce electricity at peak load, which leads to sudden variation of flows into the riverbed will be regulated in this reservoir. Irrespective of the program that the HPP has during the day, the retention basin gathers the water and evacuates it downstream as much as possible constantly during the day or, at least, attenuates the sudden variation, increase or decrease, of levels downstream. Thus, the maximum flows evacuated by the HPP can be dramatically reduced as well as the flow fluctuations and the river levels accordingly. If the flow downstream the retention basin is almost constant during the day and it is released through a small hydropower plant, the positive effect of this reservoir on hydropeaking is combined with the production of green electricity. The subject of this paper is to roughly analyse the possibility to build a retention basin downstream Golesti HPP by means of weir and contour dams, if the case may be, and to release the water constantly or with smooth fluctuations, via one or two turbines, a small hydropower plant, producing green electricity without further harming the riverbed and the ecosystem downstream the weir.

scholarly journals Development of a Hydropower Turbine Using Seawater from a Fish Farm

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 266
Author(s):  
Md Rakibuzzaman ◽  
Sang-Ho Suh ◽  
Hyoung-Ho Kim ◽  
Youngtae Ryu ◽  
Kyung Yup Kim
Keyword(s):  
Power Plants ◽  
Guide Vane ◽  
Cross Flow ◽  
Synchronous Generator ◽  
Fish Farm ◽  
Hydropower Plant ◽  
Fish Farms ◽  
Data Simulation ◽  
Small Hydropower ◽  
Hydropower Plants

Discharge water from fish farms is a clean, renewable, and abundant energy source that has been used to obtain renewable energy via small hydropower plants. Small hydropower plants may be installed at offshore fish farms where suitable water is obtained throughout the year. It is necessary to meet the challenges of developing small hydropower systems, including sustainability and turbine efficiency. The main objective of this study was to investigate the possibility of constructing a small hydropower plant and develop 100 kW class propeller-type turbines in a fish farm with a permanent magnet synchronous generator (PMSG). The turbine was optimized using a computer simulation, and an experiment was conducted to obtain performance data. Simulation results were then validated with experimental results. Results revealed that streamlining the designed shape of the guide vane reduced the flow separation and improved the efficiency of the turbine. Optimizing the shape of the runner vane decreased the flow rate, reducing the water power and increasing the efficiency by about 5.57%. Also, results revealed that tubular or cross-flow turbines could be suitable for use in fish farm power plants, and the generator used should be waterproofed to avoid exposure to seawater.

scholarly journals Fishways as Downstream Routes in Small Hydropower Plants: Experiences with a Potamodromous Cyprinid

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1041
Author(s):  
Francisco Javier Sanz-Ronda ◽  
Juan Francisco Fuentes-Pérez ◽  
Ana García-Vega ◽  
Francisco Javier Bravo-Córdoba
Keyword(s):  
General Assumption ◽  
Downstream Migration ◽  
Life Cycles ◽  
Hydropower Plant ◽  
Small Hydropower ◽  
Pit Tag ◽  
Safe Alternative ◽  
Hydropower Plants ◽  
Longitudinal Connectivity ◽  
Alternative Routes

Fish need to move upstream and downstream through rivers to complete their life cycles. Despite the fact that fishways are the most commonly applied solution to recover longitudinal connectivity, they are not considered viable for downstream migration. Therefore, alternative facilities are recommended to facilitate downstream migration. However, a few recent studies have disagreed with this general assumption, showing the potential for bidirectional movements. This study advances our understanding of the potential of fishways for downstream migration by studying their efficiency in a run-of-the-river hydropower plant in the Duero River (Spain). To achieve this, downstream movements of the Iberian barbel (n = 299) were monitored in a stepped fishway for two years with passive integrated transponder (PIT)-tag technology, considering the effect of fish origin and release zone. The results showed that 24.9% of barbels descended through the fishway, with the origin and release zone affecting the fishway location. In addition, downstream movements were observed throughout the whole year, except in winter. The study concludes that, under specific scenarios, fishways could act as safe alternative routes for downstream migration.

scholarly journals Fine-scale multiannual survey of benthic invertebrates in a glacier-fed stream used for hydropower generation

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Alberto Scotti ◽  
Roberta Bottarin
Keyword(s):  
Research Programme ◽  
Eastern Alps ◽  
Hydropower Plant ◽  
Research Network ◽  
Small Hydropower ◽  
Hydropower Plants ◽  
Before And After ◽  
Long Term Ecological Research ◽  
Research Facilities

AbstractThe present dataset contains information about aquatic macroinvertebrates and environmental variables collected before and after the implementation of a small “run-of-river” hydropower plant on the Saldur stream, a glacier-fed stream located in the Italian Central-Eastern Alps. Between 2015 and 2019, with two sampling events per year, we collected and identified 34,836 organisms in 6 sampling sites located within a 6 km stretch of the stream. Given the current boom of the hydropower sector worldwide, and the growing contribution of small hydropower plants to energy production, data here included may represent an important – and long advocated – baseline to assess the effects that these kinds of powerplants have on the riverine ecosystem. Moreover, since the Saldur stream is part of the International Long Term Ecological Research network, this dataset also constitutes part of the data gathered within this research programme. All samples are preserved at Eurac Research facilities.

scholarly journals Macroinvertebrate Recovery to Varying Hydropeaking Frequency: A Small Hydropower Plant Experiment

2021 ◽  
Vol 8 ◽  
Author(s):  
Claire Kathryn Aksamit ◽  
Mauro Carolli ◽  
Davide Vanzo ◽  
Christine Weber ◽  
Martin Schmid
Keyword(s):  
Field Experiments ◽  
Ecological Impact ◽  
Power Production ◽  
Hydropower Plant ◽  
Small Hydropower ◽  
Hydropower Plants ◽  
Recovery Times ◽  
Plant Experiment ◽  
Specific Reactions ◽  
Macroinvertebrate Drift

As the demand for hydroelectricity progresses worldwide, small hydropower operators are increasingly examining the feasibility of using existing infrastructure (e.g., settling basins) in run-of-the-river schemes for intermittent power production. Such flexible production causes short-term discharge fluctuations (hydropeaking) in downstream reaches with potential adverse effects for the sensitive fauna and flora in alpine streams. In an experimental field study on a previously unregulated section of the upper Rhone River (Switzerland), we measured density and composition of macroinvertebrate drift in two habitats (riffle, pool) following a 15-minute hydropeaking wave. The experimental hydropeaking was replicated five times over 14 days with decreasing recovery times between peaks (8, 3, 2 days, and 24 h), and drift measurements were compared with kick samples for the benthic community. Results from the kick sampling showed that benthic macroinvertebrate abundance and composition did not significantly change between the experimental peaks. There were habitat specific reactions in macroinvertebrate drift to hydropeaking, with the pool experiencing more pronounced drift abundances than the riffle. Overall, drift abundance was not significantly correlated with recovery time, but results indicate taxa-specific differences. This research advocates for the importance of completing more in-situ field experiments in order to better understand the ecological impact of flexible power production in small hydropower plants.

scholarly journals Application of Hydrosuction Sediment Removal System (HSRS) on Peaking Ponds

2012 ◽  
Vol 11 ◽  
pp. 43-48
Author(s):  
H. S. Shrestha
Keyword(s):  
Field Test ◽  
Peak Load ◽  
Load Shedding ◽  
Hydropower Plant ◽  
Dry Period ◽  
Small Hydropower ◽  
Settling Basin ◽  
Sediment Removal ◽  
Load Demand ◽  
Removal System

The value of the peaking hour energy is very high in Nepal where people are facing more than 16 hours load shedding in a day during the dry period. Currently, the peak load demand is about 90% higher than the off peak load demand. Therefore, a storage type hydropower project plays a signifi cant role in the Nepalese energy sector and decides the fate of load shedding. However, the Reservoir sedimentation studies in Nepal show that the capacity of the reservoirs has been reduced significantly; hence, preservation of these reservoirs is a vital issue.The hydrosuction sediment removal system (HSRS) is one of the methods to remove sediment from the reservoirs. A modified double layer suction head of HSRS was used in a field test of HSRS at the Settling Basin of Sunkoshi Small Hydropower Plant (SSHP) and Peaking Pond of the Sunkoshi Hydropower Plant (SHP). This paper presents field test results in the settling basin of SSHP and peaking pond of SHP and applicability of HSRS in the Kulekhani Reservoir and other peaking ponds in Nepal.DOI: http://dx.doi.org/10.3126/hn.v11i0.7162 Hydro Nepal Vol.11 2011 pp.43-48

Design of Fuzzy Logic Controller for Up to 25MW Hydropower Plant

2020 ◽  
pp. 95-106
Author(s):  
Sumer Chand Prasad
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Fuzzy Controller ◽  
Hydraulic Turbine ◽  
Hydropower Plant ◽  
Small Hydropower ◽  
Hydropower Plants ◽  
Response To Change ◽  
Turbine Speed ◽  
Gain Adjustment

In this chapter the emerging control techniques for 25 MW small hydropower (SHP) plants which utilize fuzzy logic are compared with conventional PID control for the speed control of hydraulic turbine in terms of rise time, smoothness of response, settling time, and overshoot in wicket gate opening with the response to change in turbine speed. In the case of the PID controller, gain adjustment (tuning) is required. The fuzzy controller algorithm is based on intuition, experience, and it incorporates a simple, rule-based IF X AND Y THEN Z approach. These controllers obtained don't require gain adjustment. The work done is a small step towards the automation of the hydropower plants.

scholarly journals AN AHP APPLICATION IN THE INVESTMENT SELECTION PROBLEM OF SMALL HYDROPOWER PLANTS IN TURKEY

2015 ◽  
Vol 7 (2) ◽  
Author(s):  
Burak Omer Saracoglu
Keyword(s):  
Electricity Generation ◽  
Electricity Consumption ◽  
Feasibility Studies ◽  
Decision Makers ◽  
Hydropower Plant ◽  
Small Hydropower ◽  
Analytic Hierarchy ◽  
Hydropower Plants ◽  
Four Levels ◽  
Hierarchy Process

<p>Turkey is a country that has had to deal with high electricity consumption due to its rapid growth and development. Attempts have been made to address this increase in demand by increasing the electricity supply by means such as boosting resources by privatization. The electricity generation sector has been privatized in Turkey; hence investors have been looking for the most appropriate electricity generation projects for a long while. Therefore, researchers and practitioners should focus on how the most suitable small hydropower plant project (SHPP) investments can be selected. In this study, the Analytic Hierarchy Process (AHP) was applied to make the most appropriate and satisfying decision according to the decision makers, experts or investors for a SHPP investment from amongst some alternative SHPP investments in Turkey. All of these SHPPs were assumed to be in the pre-development investment stage, which indicated that their pre-feasibility and feasibility studies had not been presented or taken into consideration until this study was performed. This main constraint forced the researchers to obtain the data and information from the information forms such as the application document to the General Directorate of State Hydraulic Works during the data and information gathering process. The AHP model of this study was structured in four levels with five main criteria, seventeen basic criteria and five alternatives on the Super Decisions Software. The results indicated that Alternative 1 and Alternative 5 should be primarily investigated in detail in subsequent SHPP investment investigation steps.</p>

scholarly journals TINJAUAN POTENSI TEKNIS DAN KELAYAKAN EKONOMI PLTA PADA PROYEK KERJA SAMA PEMERINTAH DENGAN BADAN USAHA BENDUNGAN MERANGIN

2021 ◽  
Vol 17 (2) ◽  
pp. 95-110
Author(s):  
Agustia Larasari ◽  
Jessica Sitorus ◽  
Moh. Bagus Wiratama Asad ◽  
Ary Firmana
Keyword(s):  
Economic Value ◽  
Peak Load ◽  
Average Power ◽  
Economic Feasibility ◽  
Hydropower Plant ◽  
Electricity Production ◽  
Hydropower Plants ◽  
Technical Potential ◽  
Power And Energy ◽  
Multipurpose Dam

One of the utilizations of a multipurpose dam that has socio-economic value during its operation iselectricity generation. The addition of a hydropower component to a PPP project is quite a challenge due to substantial uncertainty related to hydrological aspects that will impact electricity production and revenue, as well as high initial investment costs for generating units. This study aims to map the technical potential of hydropower and evaluate the economic feasibility of hydropower in the Merangin Dam PPP Project. The potential for power and energy generation is obtained through simulations of the hydropower operation for 19 years using hydrological data, HEC-HMS model generated-data, and dam engineering design. According to the results, the technical potential of hydropower can produce, on average, power of Pp = 103.8 MW during peak load, Pb = 98.53 MW during base load, and total energy of 636.66 GWh/year. The economic potential is evaluated through social cost-benefits analysis (SCBA) by estimating the additional benefits obtained from the hydropower compared to the PPP structure of the Merangin Dam without hydropower. Through SCBA, the addition of hydropower to the Merangin Dam PPP structure has an EIRR value of 35.24%, NPV of Rp. 2.104.212.122.723,- and BCR = 3.06. Based on these indicators, the provision of hydropower plants is considered economically feasible because the benefits that will be generated and obtained by the community are higher than the economic costs incurred.Keywords: Technical potential, economic feasibility, hydropower plant, multipurpose dam, PPP

scholarly journals An Improved Techno-Economic Approach to Determination of More Precise Installed Parameter for Small Hydropower Plants

Water ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2419
Author(s):  
Vidosava Vilotijević ◽  
Uroš Karadžić ◽  
Radoje Vujadinović ◽  
Vuko Kovijanić ◽  
Ivan Božić
Keyword(s):  
Net Present Value ◽  
Design Flow ◽  
Hydropower Plant ◽  
Electricity Production ◽  
Small Hydropower ◽  
A Value ◽  
Hydropower Plants ◽  
Wide Range ◽  
Installed Capacity

Designing a small hydropower plant (SHPP) necessitates fulfillment of energy and ecological constraints, so a well-defined design flow is of the utmost significance. The main parameters of each SHPP are determined by appropriate techno-economic studies, whereas an improved approach to defining more precise SHPP installed parameter is presented in this paper. The SHPP installed parameter is the ratio of the design flow and averaged perennial flow obtained from the flow duration curve at the planned water intake location. Previous experiences in the design of SHPPs have shown that the SHPP installed parameter has a value in a wide range without the existence of an unambiguous equation for its determination. Therefore, with this aim, the thirty-eight (38) small watercources in the territory of Montenegro, denominated for the construction of SHPPs, have been investigated. SHPPs are divided into two groups depending on the installed capacity and the method of calculating the purchase price of electricity. For both groups, the range of SHPP installed parameter is determined according to the technical and economic criteria: the highest electricity production, the highest income, net present value (NPV), internal rate of return (IRR), and payback period (PB).

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.

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