Numerical Analysis of Debris Containment Grid Fluid-Body Interaction

2018 ◽  
Author(s):  
Eduardo Tadashi Katsuno ◽  
Gustavo de Goes Gomes ◽  
Felipe Santos de Castro ◽  
Joao Lucas Dozzi Dantas
Keyword(s):  
Slip Flow ◽  
Computational Cost ◽  
Hydroelectric Power Plant ◽  
Hydropower Plant ◽  
Slip Angle ◽  
Hydroelectric Power ◽  
Flow Angle ◽  
Body Interaction ◽  
The North ◽  
Fluid Body

Debris containment grid is an important part of hydroelectric power plant, since it retains objects, preventing damage to the turbine. In the case of the Santo Antonio hydropower plant, located in the Amazon rainforest, in the north of Brazil, the most significant debris are logs. This paper aims to analyze the interaction between several log boom modules (type of debris containment grids developed specifically for containing logs) present in a debris containment line present in Santo Antonio hydropower plant, as well as its interactions with the fluid, varying the advance velocity and side-slip angle. The analysis of the fluid-body interaction is performed using CFD software with Finite Volume Method approach. The problem is divided into steps. Firstly, one log boom module is simulated with several velocities and side-slip flow angle, obtaining a relation between forces, moments and movements. Next, in order to save the expected computational cost, the module is analyzed and compared through the porosity approach. Finally, the analysis of a line with several log boom modules, including the interaction between each module, is carried out. The results of the simulations will allow to perform an analysis of the line stability, obtaining the forces, moments and movements of each log boom module, observing its influence in the log boom line. With a fluid-body hydrodynamic analysis of several modules in a line, data are provided for a structural analysis. Since the porosity approach is used to reduce the computational cost, this paper also contributes to similar cases, with a main interest in larger scales of forces and movements.

Assessment of the technical condition of underground structures of the largest hydroelectric power station in the North Caucasus, the Chirkeyskaya HPP

2021 ◽  
Vol 18 (3) ◽  
pp. 410-420
Author(s):  
Vladimir N. KAVKAZKY ◽  
◽  
Yana V. MEL’NIK ◽  
Alexey P. LEIKIN ◽  
Andrey V. BENIN ◽  
...  
Keyword(s):  
Large Scale ◽  
Practical Importance ◽  
Hydroelectric Power Plant ◽  
Technical Condition ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Underground Structures ◽  
North Caucasus ◽  
The Caucasus ◽  
The North

Objective: Chirkeyskaya HPP is by far the most powerful hydroelectric power plant in the North Caucasus with the highest arched dam in Russia and the second highest dam in the country after the Sayano-Shushenskaya HPP. This explains why it is called the pearl of the Caucasus. Methods: For the operation and maintenance of this unique structure, a large-scale complex of underground structures for various purposes was built, the technical condition of which must be constantly monitored. To carry out work on the survey of underground structures, the management of the design and survey institute of JSC “Lengidroproekt” decided to attract specialists from the Department of Tunnels and Subways and the Test Center “Strength” of Emperor Alexander I Petersburg State Transport University. The work was successfully carried out at the end of 2015. Results: The safety of underground structures was objectively assessed. Recommendations for the repair and further comprehensive reconstruction of the Chirkeyskaya HPP have been developed. Practical importance: Carry out work on the survey of underground structures of Chirkeyskaya HPP is allowes elaborate of complex measures on safety from Chirkeyskaya HPP.

Project Risk Management in Hydropower Plant Projects

2011 ◽  
Vol 3 (2) ◽  
pp. 171-186 ◽  
Author(s):  
Weddy Bernadi Sudirman ◽  
Sarwono Hardjomuljadi
Keyword(s):  
Risk Management ◽  
Time Delays ◽  
Power Plants ◽  
Hydroelectric Power Plant ◽  
Hydropower Plant ◽  
Hydroelectric Power ◽  
Project Risk ◽  
Cost Overruns ◽  
Installed Capacity ◽  
Hydropower Construction

The development of hydroelectric power plant is one of the efforts in utilising water resources for people’s welfare by generating the energy for electricity purpose. Nowadays, the installed capacity of hydro electric power plants is 3,529 MW from the total installed capacity 24,846 MW from various power plants owned by PT PLN (Persero) and the hydropower potential 75,000 MW all over Indonesia. Hydroelectric power plant has complex structures and involves large amounts of capital with a long-running construction period. This situation imposes uncertainty factors with considerably high risks. The construction phase is identified as a critical phase in hydropower projects where many unforeseen factors occur. Failure to manage project risks leads to significant problems for the client such as completion time delays and cost overruns. In order to prevent time delays and cost overruns in hydropower construction in PT PLN (Persero), the study on project risk management in the construction stage of hydropower plant projects had been conducted. The purpose of this study was to identify and measure the importance of construction risks and to determine the level of agreement or disagreement between the client, consultants and contractors on the ranking of construction risk in hydropower projects. The author selected the respondents from the clients, consultants and contractors’ personnel who had work experience in hydropower construction projects in PT PLN (Persero). JEL Classification: L74—Construction

Failure on Bearing Cooler Coils Connector of Hydroelectric Power Plant

2019 ◽  
Vol 805 ◽  
pp. 185-190
Author(s):  
Meilinda Nurbanasari ◽  
Tri Sigit Purwanto ◽  
Tarsisius Kristyadi ◽  
Deden Syamsurizal
Keyword(s):  
Hydroelectric Power Plant ◽  
Hardness Test ◽  
Hydropower Plant ◽  
Composition Analysis ◽  
Pipe Material ◽  
Hydroelectric Power ◽  
Nondestructive Tests ◽  
Stainless Steel 304 ◽  
One Year

Bearing cooler coils connector of 175 MW hydropower plant experienced premature leaks after one year operation and caused an unscheduled shutdown. To avoid the same failure in the future, the leaking bearing cooler coils connector was investigated. Nondestructive tests, such as chemical composition analysis, hardness test, metallographic test, characterization of the filler brazing by scanning electron microscopy – energy dispersive X-ray spectroscopy were conducted. The results confirmed that the bearing cooler coils connector consisted of two types of material namely the flange material which was made of stainless steel 304 and the pipe material which was a Cu/Ni 90/10 and were joined together using brazing process. It was a clearly evidence that leaks occurred in the brazing area and the leakage was due to improper brazing process. It was shown by the excessive gap and a lot of porosity.

scholarly journals Usaquén small hydropower plant - successful case

2018 ◽  
Vol 1 (2) ◽  
pp. 293-303
Author(s):  
Diego Fernando Rodríguez-Galán ◽  
Andrés Escobar-Díaz
Keyword(s):  
Power Plant ◽  
Hydroelectric Power Plant ◽  
Environmental Problems ◽  
Hydropower Plant ◽  
Hydroelectric Power ◽  
Small Hydropower ◽  
Engineering Project ◽  
Business Context ◽  
Successful Case ◽  
The City

In this study a presentation is made of the Small Hydroelectric Power Plant (PCH) located in Usaquén (Bogota), the work is based on an engineering project carried out by the Aqueduct and Sewer Company of Bogotá (EAAB). It is addressed first of all the environmental problems considered in this project and the business context that propitiates it, taking into account the technical background of the operation of the aqueduct system of the city. In second instance, the technical generalities and the scopes that were estimated in the formulation of the project are exposed to finally contrast them with the results obtained after five years of operation of the project.

scholarly journals Evaluasi Keandalan PLTA Bakaru

2021 ◽  
Vol 19 (1) ◽  
pp. 80
Author(s):  
Akbar Tanjung ◽  
Arman Jaya ◽  
Suryanto Suryanto ◽  
Apollo Apollo
Keyword(s):  
Power Plant ◽  
Hydroelectric Power Plant ◽  
Capacity Factor ◽  
Energy Utilization ◽  
Hydropower Plant ◽  
Hydroelectric Power ◽  
Hydro Power ◽  
Gross Energy ◽  
Conducting Research ◽  
The City

One form of water energy utilization is done by building a Hydroelectric Power Plant (PLTA) in Indonesia, the Bakaru PLTA is one of the projects within PT. PLN (Persero). This project is a Hydro Power Plant Master project with a SULSELRABAR transmission located 246 km from the city of Makassar. The operation of the Bakaru hydropower system is certainly expected to work optimally, reliably and efficiently. Therefore, evaluation or data on the performance of the generator itself is needed. This study was conducted to determine the condition of the Bakaru hydropower plant based on the equivalent availability factor (EAF) and Net Capacity Factor (NCF) and Cost of Production (BPP). The data used is operating data on the Bakaru hydropower plant for 1 year. The data was obtained by using the documentation technique, while the data analysis was carried out using the Microsoft Excel program. After conducting research, it can be concluded that the condition of the Bakaru hydropower plant in 2017 is considered normal, seen from the EAF value reaching 94.15% and the average EFOR value of 2.4% with the number of Service Hours (SH) of 16,912.93 hours from 2 units. with the percentage of Service Hours to Period Hours reaching 96.53%. Meanwhile, the Net Capacity Factor of the Bakaru hydropower plant in 2017 reached 85.83%, with a total gross energy production of 945,372.50 MWh. This value exceeds the target that has been set.

scholarly journals PREDIKSI DEBIT ALIRAN MASUK KE TELAGA MENJER MENGGUNAKAN PERSAMAAN NERACA AIR DAN PEMODELAN HEC-HMS

2021 ◽  
Vol 12 (2) ◽  
pp. 119-130
Author(s):  
Hiro Agung Pratama ◽  
Jazaul Ikhsan ◽  
Apip Apip
Keyword(s):  
Water Balance ◽  
Rainy Season ◽  
Catchment Area ◽  
River Flow ◽  
Hydroelectric Power Plant ◽  
Dry Season ◽  
Hydropower Plant ◽  
Hydroelectric Power ◽  
Flow Monitoring ◽  
Inflow Prediction

The Menjer lake is the main source for Hydroelectric Power Plant of the PLTA Garung. Information about the water balance and the potential of existing water resources in the Menjer Catchment Area (DTA) is needed to obtain an efficient operating pattern, the sustainability of the Garung hydropower plant, and good management of the Menjer Lake. The purpose of this study was to estimate the inflow of three main rivers in the Menjer catchment area using HEC-HMS hydrological and water balance approach. Simulated results of the HEC-HMS model shows that the average of total the inflows of three main rivers to the Menjer lake in 2017, 2018 and 2019 during rainy season are 0.954 m3/s, 0.944 m3/s, and 1.017 m3/s, and during dry season are 0.820 m3/s, 0.783 m3/s, and 0.80 m3/s, respectively. While the prediction results of the discharge with the equation of the water balance shows that the average of total river inflows to the Menjer lake during rainy season is 2017 is 1.628 m3/s, in 2018 it is 1.579 m3/s, and in 2019 it is 3.296 m3/s and during dry season is 1.893 m3/s in 2017, 1.176 m3/s tahun 2018, and 1.893 m3/s in 2019. These results indicate that the results of discharge modeling with HEC-HMS are smaller than those predicted by the water balance equation. The study concluded that HEC-HMS could be used to predict daily inflows. However, further calibration and validation need to be carried out by recommending installing a river flow monitoring station at each river outlet.Keywords: water balance HEC-HMS, inflow prediction

scholarly journals TEMPORAL AND DISCURSIVE VARIATION OF THE “BOGUCHANSKAYA HYDROELECTRIC POWER PLANT” CONCEPT

2021 ◽  
Vol 16 (4) ◽  
pp. 68-71
Author(s):  
O.V. Felde ◽  
Keyword(s):  
Hydroelectric Power Plant ◽  
Semantic Content ◽  
Russian Language ◽  
Hydropower Plant ◽  
Hydroelectric Power ◽  
Cognitive Mechanisms ◽  
Conversational Discourse ◽  
Displaced People ◽  
Boguchanskaya Hpp ◽  
The Individual

Statement of the problem. One of the postulates of the modern cognitive-discursive paradigm is the thesis about the variability of structure and content of the concept. The variability of the concept is influenced by many factors: temporal, socio-cultural, discursive, ecological, political, and individual-psychological. The relevance of the study of variability of the concept is due to a number of reasons: 1) the need for theoretical justification of the heterogeneity of concepts within the same linguoculture; 2) the possibility of revealing the ratio of basic and variable informational and axiological structures in the content of the concept; 3) the need to establish the connection of cognitive mechanisms with worldview and with the emotional reflection of the individual and / or social groups; 4) the importance of studying the factors of “constructing reality” by actualizing those or other sides of the concept. The purpose of the article is to consider the variation of the value and semantic content of the “Boguchanskaya HPP” concept, to determine the causes and factors of variation of units of expression of figurative and value layers of this concept. In order to achieve this goal, linguistic, stylistic and linguopragmatic means of expression of the “Boguchanskaya HPP” concept in different types of discourse are analyzed. The material of the research. The empirical basis of the study is the data of the National Corpus of the Russian language; materials of publications in the media about Boguchanskaya HPP, placed in the section “Press” on the main website of the hydropower plant (http://www.boges.ru/press-tsentr/smi-o-boguchanskoy-ges/publikatsii-v-presse/); publications of the website “Dam. No!” (http://www.plotina.net/); transcripts of interviews and reminiscences of displaced people from the flood zone of Boguchanskaya HPP as well as people permanently residing in Boguchansky and Kezhemsky districts of the Krasnoyarsk region. As a result of a sample listing of written and oral texts about Boguchanskaya HPP, more than 400 contexts of conceptual, figurative and axiological attributes of this concept were written out. The research methodology is as follows: in order to achieve the goal the method of conceptual analysis developed by representatives of the linguocultural direction, as well as the interpretive analysis and the method of linguistic description of the results are used. Research results. The “Boguchanskaya HPP” concept refers to dynamic, actively translated concepts of national linguoculture. It is distinguished by high modifying potential, discursive variability of its structure, and value and semantic content. Variability of the content of this concept is manifested, first of all, in different degrees of relevance of those or other conceptual features at different stages of its life cycle, as well as ambivalence of evaluations which determine the content of axiological layer of the “Boguchanskaya HPP” concept in conversational discourse, ecological Internet discourse and official mass-media discourse. The reason for the variability of the value and semantic content of the concept are socio-economic, socio-cultural and civilizational factors.

scholarly journals Features of natural plant complexes restoration and land reclamation in the area of Ust-Srednekanskaya hydroelectric power plant on the Kolyma river

2021 ◽  
Vol 265 ◽  
pp. 04016
Author(s):  
Pavel E. Tikhmenev ◽  
Andrey A. Smirnov ◽  
Evgeniy A. Tikhmenev ◽  
Galina V. Stanchenko
Keyword(s):  
Land Reclamation ◽  
Hydroelectric Power Plant ◽  
Anthropogenic Factors ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Natural Plant ◽  
North East ◽  
The North ◽  
The Impact ◽  
Kolyma River

The low resistance of the landscapes of the North-East of Russia to anthropogenic influences is shown. The features of natural plant complexes restoration and land reclamation in the area of the Ust-Srednekanskaya hydroelectric power station are considered. In order to create conditions for the successful restoration of vegetation cover after the impact of anthropogenic factors, it is recommended to carry out measures for leveling the disturbed surface and terracing it. It is proposed to carry out artificial sowing of cereals, which are characterized by regular and abundant fruiting.

CFD Simulation of the Submerged Cofferdams Effect on the Operation of the Future Tocoma Hydroelectric Power Plant

2009 ◽  
Author(s):  
Milan Stanko ◽  
Andrea Shmueli ◽  
Miguel Asuaje ◽  
Frank Kenyery ◽  
Gonzalo Montilla ◽  
...  
Keyword(s):  
Power Plant ◽  
Velocity Profile ◽  
Cfd Simulation ◽  
Numerical Study ◽  
Computational Cost ◽  
Hydroelectric Power Plant ◽  
Normal Operation ◽  
Hydroelectric Power ◽  
Uniform Velocity ◽  
Operation Conditions

The Tocoma hydroelectric power plant, currently under construction, is located on the lower basin of the Caroni River in Bolivar State in Venezuela. This power plant will have 10 Kaplan turbines in its powerhouse that will generate approximately 2160 MW of hydroelectric power. During its construction, two cofferdams designated “A” and “B” will be built and afterwards will remain submerged. The main purpose of this experimental-numerical study is to analyze the possible future hydrodynamic effects of these structures on the operation of the Kaplan turbines. The presence of the submerged cofferdams could originate tridimensional hydrodynamic behaviors that could produce energy looses and operational and functional problems to the turbines. Two mathematical steady state single phase models using Computational Fluid Dynamics (CFD) Techniques and applying the commercial software ANSYS-CFX were developed. The first model represented the hydroelectric power plant reservoir that was quantitatively and qualitatively calibrated with a Froude Similarity 1:80 Scale Physical Model. Hydrodynamic flow patterns near to the intakes were found in the first model. Those patterns showed a non-uniform velocity profile in the unit’s intakes nearest to cofferdam “B”. The second mathematical model represented the study of the intake, the semi-spiral case and the Kaplan turbine. This model considers the non-uniform velocity profile that was found in the first model as an inlet boundary condition. Two methodologies were used to develop this model: one using two simulations with two overlapping physical domains, and the other one using the whole geometry. It was found that using overlapping domains in order to reduce the computational cost of the total simulation is a good way to obtain physical results with fair accuracy. The general results reported that the velocity profile at the intake of the powerhouse does not produce any stationary non uniform behavior on the velocity and pressure profiles in the unit compared to the uniform velocity profile case. This result could be an indicator that the non uniform condition at the intake of the Kaplan Turbines at Tocoma will not affect the normal operation conditions of the unit.

Power Plant Performance Based on Power-Efficiency Curve of Hydroelectric Power Plant

2015 ◽  
Vol 785 ◽  
pp. 516-520 ◽  
Author(s):  
Anis Shazwani Zulkifli ◽  
Noor Miza Muhamad Razali ◽  
Marayati Marsadek ◽  
Zainuddin Yahya ◽  
Tengku Juhana Tengku Hashim
Keyword(s):  
Power Plant ◽  
Power Efficiency ◽  
Large Scale ◽  
Good Condition ◽  
Hydroelectric Power Plant ◽  
Plant Performance ◽  
Hydropower Plant ◽  
Hydroelectric Power ◽  
Performance Curve ◽  
Efficiency Curve

—Hydropower energy is widely used throughout the world. It is the only renewable energy that is presently commercially practical on the large scale. In order to maintain the hydropower plant in good condition, the performance of the power plant needs to be monitored constantly. Efficiency curve helps in studying the performance of the turbine under various conditions and this is the best way to look for the performance of the power plant. Therefore, this paper presents the relationship between load (MW) and efficiency of each turbine and generator unit. This project uses Microsoft Excel 2010 software to produce a graph from the exact data produced from the database. This paper’s objective is to compare the theoretical performance curve and the calculated performance curve and also to discuss the hydroelectric power plant performance.

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