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 Studi Optimasi Operasional Waduk Koto Panjang Untuk Pembangkit Listrik Tenaga Air

2021 ◽  
Vol 21 (01) ◽  
pp. 31-44
Author(s):  
Diana Hanafi ◽  
Harmiyati
Keyword(s):  
Power Plant ◽  
Water Balance ◽  
Electric Power ◽  
Rainy Season ◽  
Electrical Power ◽  
Hydroelectric Power Plant ◽  
Empirical Method ◽  
Dry Season ◽  
Hydropower Plant ◽  
Hydroelectric Power

[ID] Pada musim kemarau PLTA Koto Panjang pernah mengoperasikan satu unit turbin dan generator sehingga daya yang dihasilkan tidak maksimal. Pada musim yang sama PLTA ini juga pernah mengoperasikan tiga unit turbin dan generator namun hanya menghasilkan daya listrik  35 MW dengan prosentase  50 % yaitu  30,702 % dari daya maksimal pengoperasian tiga unit turbin dan generator. Tujuan dari penelitian ini adalah untuk mengetahui debit andalan PLTA Koto Panjang, optimalisasi yang dilakukan dalam mengoptimasi PLTA Koto Panjang, daya listrik yang dihasilkan dari hasil optimalisasi tersebut dan perbandingannya. Metode empiris Penman digunakan untuk menghitung nilai evaporasi. Debit andalan untuk debit outflow PLTA saat ini dan setelah dioptimalisasi dihitung menggunakan rumus daya listrik dan metode mass curve. Selanjutnya debit outflow PLTA yang telah didapatkan dianalisis di dalam tabel water balance menggunakan metode sequent peak analysis. Hasil yang didapatkan adalah debit andalan PLTA saat ini dan setelah dioptimalisasi yaitu 305,319 m3/det dan 384,465 m3/det dengan prosentase 51,995 % dan 39,235 %. Optimalisasi dilakukan dengan menyesuaikan debit outflow dengan volume air yang ada pada storage saat itu. Daya listrik setelah dioptimalisasi adalah sebesar 13.302,315 kWatt pada musim kering dan 143.551,645 kWatt pada musim hujan. Daya listrik yang dihasilkan PLTA saat ini adalah sebesar 13.302,315 kWatt pada musim kering dan 114.000 kWatt pada musim hujan. Sehingga daya listrik yang dihasilkan PLTA setelah dioptimalisasi mengalami kenaikan dari daya listrik sebelum dioptimalisasi sebesar 29.551,645 kWatt. Karena kenaikan daya melebihi kapasitas generator PLTA saat ini, maka terjadi penambahan 1 generator 30.000 kWatt atau 30 MW. [EN] In the dry season, Koto Panjang Hydroelectric Power Plant has operated one turbine and generator unit so the power produced is not optimal. In the same season, this hydropower plant has also operated three turbines and generators but only produces  35 MW of electricity by percentage  50% which is  30,702 % of the maximum power from operating three turbine and generator units. The purpose of this research is to determine the mainstay discharge of Koto Panjang Hydroelectric Power Plant, optimization will be used for Koto Panjang hydroelectric power plant, power can produce from its optimization and its comparison. The Penman empirical method was used to calculate the evaporation value. The mainstay discharge for hydropower plant outflow discharge at this time and after being optimized is calculated using the electrical power formula and the mass curve method. Furthermore, the hydroelectric power plant outflow discharge has obtained is analyzed in the water balance table using the sequent peak analysis method. The results obtained are the current mainstay discharge of hydroelectric power plant and after optimization, which are 305,319 m3/s and 384,465 m3/s with a percentage of 51,995% and 39,235%. Optimization is done by adjusting the outflow discharge to the volume of water in the storage at that time. The electric power after optimization is 13.302,315 kWatt in the dry season and 143.551,645 kWatt in the rainy season. The current electricity generated by hydroelectric power plant is 13.302,315 kWatt in the dry season and 114.000 kWatt in the rainy season. Therefore the electric power generated by hydroelectric power plant after optimization has increased from the electric power before it is optimized which is 29.551,645 kWatt. Because the increasing of the electric power exceeds the capacity of the current hydroelectric power plant generator, there is an addition 1 generator which is 30.000 kWatt or 30 MW.

Biodiversity of Hematophagous Diptera (Culicidae and Psychodidae) in a Small Hydroelectric Power Station and Surrounding Area in the State of Minas Gerais, Brazil

2019 ◽  
Vol 57 (1) ◽  
pp. 312-317
Author(s):  
Felipe Dutra Rêgo ◽  
Maria Angélica de Oliveira ◽  
Gustavo Mayr de Lima Carvalho ◽  
José Dilermando Andrade Filho
Keyword(s):  
Rainy Season ◽  
Statistical Significance ◽  
Minas Gerais ◽  
Dry Season ◽  
The State ◽  
Hydropower Plant ◽  
Hydroelectric Power Station ◽  
Sand Flies ◽  
Hydroelectric Power ◽  
Power Station

Abstract Hydroelectric power stations may affect the population dynamics of mosquitoes and sand flies, a group with impact on public health due to the possibility to transmit pathogens to humans. This work characterized and compared the fauna of mosquitoes and sand flies in a hydroelectric power station and peridomicile areas in the State of Minas Gerais, Brazil. Insect collections were performed in August 2015 at dry season and February 2016 in rainy season. Ten HP light traps were set at each of two sites for three consecutive days in each of two seasons (dry and rainy). Furthermore, collections with Shannon traps were made in each sampling area (hydropower plant and peridomicile area) from 4:00 p.m. being shut down at 8:00 p.m. for two consecutive days in each of two seasons (dry and rainy). In total, 1,222 insects from 13 genera and 27 species were collected. The most plentiful species were respectively Culex declarator (Dyar and Knab, 1906) and Pintomyia pessoai (Coutinho & Barretto, 1940). A high number of insects (78.5%) were collected during the rainy period (P < 0.05). About equitability, statistical significance was observed in the peridomicile area (dry season J = 0.75 and rainy season J = 0.82). The highest values of species diversity were observed in the hydropower plant (H = 2.68) and peridomicile area (H = 2.38) both in the rainy season with statistical significance comparing with dry season. Our results demonstrate that the occurrence of vector species in this region increases the potential risk of transmission of pathogens, especially arbovirus and Leishmania Ross, 1903.

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 The Corrosivity Level of Rawa Pening Downstream Surface Water in the Dry and Rainy Season

2020 ◽  
Vol 17 (3) ◽  
pp. 215-222
Author(s):  
Purwono Purwono ◽  
Wiharyanto Oktiawan ◽  
Titik Istirokhatun ◽  
Agus Nurfaiz
Keyword(s):  
Surface Water ◽  
Rainy Season ◽  
Agricultural Land ◽  
Ph Value ◽  
Dry Season ◽  
Hydroelectric Power ◽  
Geological Material ◽  
Measurement Results ◽  
Microbiological Parameters

Corrosion is an important factor that can affect the quality of air used by humans. This has an impact on health and economic factors, damage to air distribution equipment. The level of corrosivity of surface water as raw water for drinking water is important to be examined before the water enters the processing process or other uses such as hydroelectric power (PLTA). This study aims to measure the level of water corrosivity on the surface of the Pening swamp during the dry and rainy seasons in 2018. Taking air samples on the surface of the Pening swamp, then carrying out laboratory tests on the parameters of air corrosivity. The results showed that the downstream surface of the Pening swamp was not corrosive in terms of pH, temperature, TDS, and chloride parameters. The pH value in the dry season (J1) is 7.00, while in the rainy (J2) it is 7.77 and is non-corrosive. The temperature values are 28.6oC and 29.3oC in the rainy and dry seasons, respectively. The TDS measurement results in the dry season are lower than the rainy season by a difference of 12 mg / l. In the dry season it is 141 mg / l and the rainy season is 153 mg / l. This increase probably came from geological material (geological material) such as rocks and soil around the Pening Swamp Lake. Other sources of TDS include urban land, road workers, agricultural land and pasture. Human activities also increase in the increase of TDS in water including domestic activities (bathing and washing), trade, and industry. Chloride levels were 2.19 mg / l and 3.19 mg / l. This research has implications for the users of Sungai Pening Swamp. The corrosivity of air measurement is also by microbiological parameters which need to be investigated further.

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 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 Kualitas Fisik dan Kimia Sungai Citarum yang bermuara ke Waduk Cirata di Wilayah Kabupaten Cianjur

2019 ◽  
Vol 19 (3) ◽  
pp. 628
Author(s):  
Bramantiyo Eko Putro ◽  
Isma Masrofah
Keyword(s):  
Water Quality ◽  
River Flow ◽  
Pollution Prevention ◽  
Hydroelectric Power Plant ◽  
Fish Farming ◽  
Middle Part ◽  
Clean Water ◽  
Hydroelectric Power ◽  
Reservoir Water ◽  
Pollutant Sources

Pollution prevention must be carried out in the upstream, middle and downstream parts. One of the Citarum watersheds located in the middle part is the Cirata reservoir. Pollution in the Cirata reservoir does not only originate from the reservoir environment, but also from rivers that flow into the Cirata reservoir. Cirata Reservoir besides being a Hydroelectric Power Plant (PLTA) unit, this reservoir is also used by the community for fish farming in the Floating Net Pool (KJA) technique. This study aims to determine the most dominant pollutants contaminating the Cirata reservoir. Test of river and reservoir water quality is carried out with the help of lab tests by Labkesda. The research data was obtained by obtaining clean water quality test data from several 3 estuary points of the river flow to the Cirata reservoir and 4 centers of Cirata reservoir number of 40 samples. Data processing techniques are carried out using data mining, namely Exploratory Data Analysis. The lab parameter test results, which are compared with the Permenkes No. 32 Year 2017 standard, show that the majority of the physical and chemical quality parameters of the Citarum River which empties into the Cirata Reservoir are still within the required threshold. Most river and reservoir water samples have water quality that qualifies as clean water. Five samples (12.5%) in turbidity parameters and 1 sample (2.5%) in color samples did not qualify as clean water. This is possible because the sampling is too close to the mainland. Temperature parameters of 20 samples (50%) do not qualify as clean water is possible because of the lag time of sampling. The results of the analysis showed that the distance of pollutant sources, the amount of pollutant sources, and environmental conditions around the sampling significantly with temperature, TDS, turbidity, color, pH, nitrogen, iron, hardness, manganese, fluoride, and cyanide.

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.

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