Optimized Implementation of Small Hydropower Plants on a River. Case Study

2018 ◽  
Author(s):  
Alexandru Moldoveanu ◽  
Daniela Popescu
Keyword(s):  
Small Hydropower ◽  
Hydropower Plants

Carbon dioxide emission accounting for small hydropower plants—A case study in southwest China

2015 ◽  
Vol 47 ◽  
pp. 755-761 ◽  
Author(s):  
Jing Zhang ◽  
Chuan-Yan Luo ◽  
Zachary Curtis ◽  
Shi-huai Deng ◽  
Yang Wu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Southwest China ◽  
Carbon Dioxide Emission ◽  
Small Hydropower ◽  
Hydropower Plants

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 Forecasting monthly energy production of small hydropower plants in ungauged basins using grey model and improved seasonal index

2017 ◽  
Vol 19 (6) ◽  
pp. 993-1008 ◽  
Author(s):  
Chun-Tian Cheng ◽  
Shu-Min Miao ◽  
Bin Luo ◽  
Yong-Jun Sun
Keyword(s):  
Energy Production ◽  
Moving Average ◽  
Grey Model ◽  
Small Hydropower ◽  
Ungauged Basin ◽  
Model Combining ◽  
Hydropower Plants ◽  
Study Results ◽  
Seasonal Index

Abstract A first-order one-variable grey model (GM(1,1)) is combined with improved seasonal index (ISI) to forecast monthly energy production for small hydropower plants (SHPs) in an ungauged basin, in which the ISI is used to weaken the seasonality of input data for the GM(1,1) model. The ISI is calculated by a hybrid model combining K-means clustering technique and ratio-to-moving-average method, which can adapt to different inflow scenarios. Based on the similar hydrological and meteorological conditions of large hydropower plants (LHPs) and SHPs in the same basin, a reference LHP is identified and its local inflow data, instead of the limited available data of SHPs, is used to calculate the ISI. Case study results for the Yangbi and Yingjiang counties in Yunnan Province, China are evaluated against observed data. Compared with the original GM(1,1) model, the GM(1,1) model combined with traditional seasonal index (TSI-GM(1,1)), and the linear regression model, the proposed ISI-GM(1,1) model gives the best performance, suggesting that it is a feasible way to forecast monthly energy production for SHPs in data-sparse areas.

scholarly journals Small hydropower plants in Spain: A case study

2011 ◽  
Vol 15 (6) ◽  
pp. 2729-2735 ◽  
Author(s):  
C. Alonso-Tristán ◽  
D. González-Peña ◽  
M. Díez-Mediavilla ◽  
M. Rodríguez-Amigo ◽  
T. García-Calderón
Keyword(s):  
Small Hydropower ◽  
Hydropower Plants

scholarly journals Water constructions in countryside – case study of land use on the river Svratka in the village Ujčov (Moravia)

2017 ◽  
Vol 9 (1) ◽  
pp. 194-210
Author(s):  
Petra Oppeltová ◽  
František Bureš
Keyword(s):  
Land Use ◽  
Negative Impact ◽  
Economic Potential ◽  
Small Hydropower ◽  
The Past ◽  
Hydropower Plants ◽  
Ecological Importance ◽  
The Village ◽  
New Habitats

Abstract Buildings and facilities on waterways have significant landscaping, water management and ecological importance. They affect the landscape and create conditions for the emergence of new habitats. Small dams, mills, saws, small hydropower plants, dams and other water objects and structures, which more or less affect the flow of the surrounding countryside, are built and are building in the countryside. Within design and construction of these objects environmental relationships must be respected and in line with the sustainable exploitation of the territory. Many objects built in the past adversely affected the flow and the landscape while make it impossible the migration of fish and amphibians. A series of objects is currently non-functional and have a negative impact on the flow and the surrounding countryside. In such cases the streams are revitalized or inoperative objects are removed, fish ladders are often built. This study evaluates the possibility of using land adjacent to the fixed weir on the Svratka river in the Ujčov village, from the viewpoint of maintaining the existing biodiversity, aesthetic and economic potential of the territory. A study with several options of land use is the result.

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 Assessment of the Impact of Small Hydropower Plants on the Ecological Status Indicators of Water Bodies: A Case Study in Lithuania

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 433
Author(s):  
Laima Česonienė ◽  
Midona Dapkienė ◽  
Petras Punys
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrates ◽  
Suspended Solids ◽  
Ecological Status ◽  
Fish Abundance ◽  
Water Bodies ◽  
Small Hydropower ◽  
Hydropower Plants ◽  
Physico Chemical ◽  
The Impact

Hydropower plants produce renewable and sustainable energy but affect the river’s physico-chemical characteristics and change the abundance and composition of the aquatic organisms. The impact of large HPPs on the ecological conditions of surface water bodies have been extensively studied, but less attention has been paid to environmental impact studies of small hydropower plants (SHPs). The impact of hydropeaking on both the river flow regime and ecosystems has been well-studied for peaking mode plants, mainly medium to large-sized ones. However, for small hydroelectric power plants, and especially for those in lowland rivers, the available information on water quality, benthic macroinvertebrates communities and fish abundance, and biomass is not sufficient. Ten small hydropower plants were selected, and the ecological status of water bodies was assessed in different parts of Lithuania. The studies were performed at the riverbed upstream from the SHPs, where the hydrological regime has not changed, and downstream from the SHPs. It was found that the small hydropower plants do not affect the physico-chemical values of the water quality indicators. This study demonstrated that the total number of benthic macroinvertebrates taxa (TS) is influenced by the concentration of nitrogen and suspended solids, the water flow, the river area, and the current speed; the number of EPT (Ephemeroptera (mayflies), Plecoptera (stoneflies), and Trichoptera (caddisflies)) taxa is influenced by the concentration of nitrogen and suspended solids. The studied indicators do not have a significant impact on biomass. The SHPs affect the fish abundance and biomass. The Lithuanian fish index (LFI) is influenced by the average depth and area of the river. Some SHPs operating in lowland areas may yield somewhat significant hydrograph ramping but more detailed investigation is needed to support the significance of this impact on the biological indices.

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