Comparison of Performance of Two Run-of-River Plants during Transient Conditions

Çalamak, Melih; Bozkuş, Zafer

doi:10.1061/(asce)cf.1943-5509.0000370

Cited by 10 publications

(7 citation statements)

References 5 publications

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“…A number of methods and models have been developed for the analysis of hydraulic transients, like the graphical method, the algebraic method, the implicit method, the wave characteristic method, the Method of Characteristics (MOC), the Zielke model, the Brunone model, Surge2012, and much more commercial software [4][5][6][7][8][9]. Calamak et al [10] developed a computer program using MOC, which accurately predicted pressures for various simulations in case studies having a Pelton and Francis turbine. Martin et al [11] performed 3-D and 1-D simulations for various unsteady friction formulations and discovered that the convolution-based unsteady friction models, which consider a set of previous time steps in simulation, perform better than the instantaneous acceleration-based models.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling and Hydraulic Optimization of a Surge Tank Using Particle Swarm Optimization

Bhattarai

Zhou

Palikhe

et al. 2019

Water

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In a pressurized water conveyance system, such as a hydropower system, during hydraulic transients, maximum and minimum pressures at various controlling sections are of prime concern for designing a safe and efficient surge tank. Similarly, quick damping of surge waves is also very helpful for the sound functioning of the hydro-mechanical system. Several parameters like diameter of the surge tank, diameter of the orifice, operating discharge, working head, etc., influence the maximum/minimum surge, damping of surge waves in the surge tank, and the difference of maximum pressure head at the bottom tunnel and maximum water level in the surge tank. These transient behaviors are highly conflicting in nature, especially for different diameters of orifices (DO) and diameters of surge tanks (DS). Hence, a proper optimization method is necessary to investigate the best values of DO and DS to enhance the safety and efficiency of the surge tank. In this paper, these variables are accurately determined through numerical analysis of the system by the Method of Characteristics (MOC). Furthermore, the influence on the transient behavior with changing DO and DS is investigated and finally, optimum values of DO and DS are determined using Particle Swarm Optimization (PSO) to minimize the effects of hydraulic transients on the system without compromising the stability and efficiency of the surge tank. The obtained results show significant improvements over the contemporary methods of finding DO and DS for surge tank design.

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Section: Introductionmentioning

confidence: 99%

Numerical Modeling and Hydraulic Optimization of a Surge Tank Using Particle Swarm Optimization

Bhattarai

Zhou

Palikhe

et al. 2019

Water

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“…Climate change and global warming and are the utmost thoughtful problems for developing countries. Thus, inexpensive power generation with a small amount of release of greenhouse gases is essential for developing countries as well as the world [3]. Hydro-energy is reflected as the non-conventional, non-polluting and environment-friendly source of energy [4].…”

Section: Introductionmentioning

confidence: 99%

“…[13] Developed computational models for comparing the performances of two ROR hydropower plants by measuring transitory pressures at different points. [3] Evaluated the performance of different types like fossil fuel, geothermal, wind, hydro and gas power plants in Turkey using the fuzzy-TOPSIS technique, for the criteria like efficiency, cost of installation, and cost of electricity, CO 2 emission and societal approval. [14] Presented a comprehensive analysis of hydropower plants in Canada and have considered the capability of power generation, profits, and ecological benefits along with community concern using the TOPSIS method.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation Of The Hydropower Plants Using Various Multi-Criteria Decision-Making Techniques

2019

ijeat

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Annual growth of 2.3 % since 1990 to 2017 in the hydropower sector in India indicates it holds a vital position in the growth of electricity generation in the country. For effective and efficient running of the hydropower projects, maintenance schedules and performance evaluation have to be done. Thus, this paper presents the performance evaluation of four different hydro-powerhouses belonging to a different class. Multi-criteria decision making (MCDM) method stepwise weight assessment ratio analysis (SWARA) is used to calculate the weights. The weights calculated by SWARA are employed to assess the performance scores or ranks of Indira Sagar Project (ISP), Canal Head Power House (CHPH) and River Bed Power House (RBPH) at Sardar Sarovar Narmada Nigam Ltd. (SSNNL) by integrating SWARA with the MCDM techniques like weighted aggregate sum product assessment (WASPAS), technique for order of preference by similarity to ideal solution (TOPSIS) and preference ranking organization method for enrichment evaluation (PROMETHEE). A comparative analysis of these integrated methods is presented for improved future studies in the area of decision making. The results in this paper show performance rankings of the available alternatives, calculated using integrated SWARA-WASPAS, SWARA-TOPSIS and SWARA-PROMETHEE methods. Performance ranks obtained by SWARA-WASPAS and SWARA-TOPSIS methods are in the order ISP, RBPH, CHPH and LSPH, which shows similarity with the on-field performances and are well suited for the performance evaluation of hydropower projects

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“…Bong and Karney [20] studied on the optimal location and size of surge tanks and pressure relief valves for a certain hydraulic network. Calamak [21] also worked on the protective measures against the transient flow conditions in the Erfelek hydropower plant.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the hydraulic transient response in the presence of surge tanks and relief valves

Riasi

Tazraei

2017

Renewable Energy

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Water hammer as a critical consequence of unsteadiness may take place in the penstock of the hydroelectric power plants. Hence, the unsteady flow analysis is important to identify undesirable pressure variations and to take preventive actions toward guaranteeing safe operation of the power plant. Chief among these actions are the installation of a surge tank and relief valve, and the transient flow behavior in the presence of protective devices is investigated herein. The method of characteristics is employed to numerically solve the equations governing the transient flow through channels. Also, in order to better resolve the transient behavior, unsteady friction effects have been considered. Validation of the developed computational code is carried out through comparison of the computed transient pressures with those measured at Karun-III Hydropower Plant. According to the results obtained for MONJ Hydropower Station, when only one turbine is in operation, the surge tank decreases the pressure rise within the spiral case and the turbine overspeed by 22% and 6%, respectively. While the percentages associated with employing a proper surge relief valves are accordingly 12% and 14%. This study substantiates how surge relief valves can be used instead of an expensive surge tank to relieve the transient response.

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Comparison of Performance of Two Run-of-River Plants during Transient Conditions

Cited by 10 publications

References 5 publications

Numerical Modeling and Hydraulic Optimization of a Surge Tank Using Particle Swarm Optimization

Numerical Modeling and Hydraulic Optimization of a Surge Tank Using Particle Swarm Optimization

Performance Evaluation Of The Hydropower Plants Using Various Multi-Criteria Decision-Making Techniques

Numerical analysis of the hydraulic transient response in the presence of surge tanks and relief valves

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