ENERGY EFFICIENCY OF SMALL HYDROPOWER PLANT THROUGH ENVIRONMENTAL RESTRICTIONS ON WATER USE FOR POWER GENERATION

Abstract The authors estimate the potential for power generation from water resources of small and medium-sized rivers, which are abundant in Latvia. They propose the algorithm for optimal operation of a small-scale hydropower plant (SHPP) at the chosen optimality criterion in view of the plant’s participation in the market. The choice of SHPP optimization algorithm is made based on two mathematical programming methods - dynamic and generalized reduced gradient ones. Approbation of the algorithm is illustrated by an example of optimized SHPP operation.

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A conceptual framework for real time estimation of WFP for small hydroelectric power plant

Water Policy ◽

10.2166/wp.2017.289 ◽

2017 ◽

Vol 19 (6) ◽

pp. 1049-1062

Author(s):

C. Sivapragasam ◽

M. Pallikonda Rajasekaran ◽

M. Vinotha

Keyword(s):

Power Generation ◽

Real Time ◽

Water Footprint ◽

Time Estimation ◽

Hydropower Plant ◽

Hydroelectric Power ◽

Small Hydropower ◽

Water Release ◽

Large Reservoir ◽

Operation Conditions

Abstract It is believed that the power sector, particularly hydroelectric power, contributes to a very high consumption of fresh water in terms of evaporation from storage reservoirs. Robust methods of water footprint (WFP) assessment will eventually help in the pricing of water and energy. Conventionally, WFP for hydropower plants is estimated by dividing the gross/net evaporation losses by power generation. This approach is highly biased when it comes to a small hydropower plant connected to a large reservoir. In this study, a two-pronged subjective–objective method is suggested for a reservoir with primary functions of power generation and downstream water release. The objective part is concerned with giving weight to the evaporation loss proportional to the water use while the subjective part is concerned with refining this by considering the real time reservoir operation conditions and taking into account the recommendations of the decision making authorities. The effect of timescale in WFP analysis is also studied and conclusions are drawn. Thumb rules for WFP estimation are evolved which will aid in such analysis. The implementation of the proposed methodology for any reservoir system is recommended using LabVIEW platform.

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Estimation of Energy Efficiency for Hydropower Generator

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.c1013.1083s19 ◽

2019 ◽

Vol 8 (3S) ◽

pp. 66-70

Keyword(s):

Energy Efficiency ◽

River Flow ◽

Electrical Energy ◽

Hydropower Plant ◽

Daily Routine ◽

Small Hydropower ◽

Flow Strength ◽

Energy Score ◽

Result Show ◽

Adaptive Solution

Electrical energy is getting more important in our daily life. With the coming development of the Sarawak Corridor of Renewable Energy (SCORE), hydropower plant is getting more interesting to face the demand on the domestic usage. Electrical energy can be used to carry out our daily routine. Small hydropower been very adaptive solution for rural area. Hence, this paper shows the estimation of energy efficiency for hydropower generator for Belawai river located at Sarawak. Excess rainfall hyetograph and direct runoff hydrograph been use to evaluate efficiency of the power generation based on river flow. Result show river flow strength depend on the rainfall which is about 38.56% of efficiency and other environmental factors which will affect the efficiency of the converter

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Inverter Loss and Annual Energy Efficiency Analysis on 5 MW Wind Power Generation System

2020 23rd International Conference on Electrical Machines and Systems (ICEMS) ◽

10.23919/icems50442.2020.9290793 ◽

2020 ◽

Author(s):

Eiji Muramatsu ◽

Kenta Sugiyama ◽

Wataru Kitagawa ◽

Takaharu Takeshita

Keyword(s):

Power Generation ◽

Energy Efficiency ◽

Wind Power ◽

Efficiency Analysis ◽

Wind Power Generation ◽

Generation System ◽

Power Generation System ◽

Energy Efficiency Analysis

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Development of a Hydropower Turbine Using Seawater from a Fish Farm

Processes ◽

10.3390/pr9020266 ◽

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.

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

Water ◽

10.3390/w13081041 ◽

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.

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