scholarly journals Analisis Efisiensi Daya Pembangkit Listrik Tenaga Mikrohidro Menggunakan HOMER (Studi Kasus PLTMH Parakandowo Kabupaten Pekalongan)

2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Siti Suci Murni ◽  
Agus Suryanto
Keyword(s):  
Power Plant ◽  
River Water ◽  
Power Efficiency ◽  
Research Method ◽  
Water Discharge ◽  
Dry Season ◽  
Simulation Results

Microhydro Power Plant (MPP) is a power plant that uses water as a medium to drive turbines and generators. The power generated by PLTMH depends on the flow of river water that flows through PLTMH Prakandowo. In the dry season the water discharge fluctuates so that the efficiency of the MPP has decreased. The research was conducted to analyze the Power Efficiency of MPP Parakandowo. The research method used in this research is non-experimental quantitative using descriptive methods in Parakandowo Hamlet, Sidomulyo Village, Lebakbarang District, Pekalongan Regency. This study provides an overview of the decrease in power efficiency of PLTMH Parakandowo in the dry season. The results of this study are the efficiency value of PLTMH Parakandowo of 65.33% which indicates inefficiency, due to the effect of decreasing water discharge. The long-term solution is to connect MPP with PLN. Homer software can simulate a grid connected MPP with PLN. The simulation results of Homer software hybridize PLTMH with PLN, namely the energy that can be produced is 122,593 kW / year.Keywords—MPP,efficiency,homer,grid connected

scholarly journals STUDI KELAYAKAN PEMBANGKIT LISTRIK TENAGA MINI HIDRO DI SUNGAI MANULA KECATAMAN PUGUNG KABUPATEN PESISIR BARAT LAMPUNG

2019 ◽  
Author(s):  
Rosnita Rauf
Keyword(s):  
Energy Source ◽  
Power Plant ◽  
River Water ◽  
Feasibility Study ◽  
West Coast ◽  
National Park ◽  
Fossil Fuels ◽  
Water Discharge ◽  
Environmentally Friendly ◽  
Hydro Power

FEASIBILITY STUDY OF MINI HIDRO POWER PLANT IN THE RIVER MANULA PUGUNG COUNTRYDISTRICT OF WEST COASTAL LAMPUNGRosnita Rauf*), Helny Lalan, and BudimanDepartment of Electrical Engineering, Faculty of Engineering & Planning, Ekasakti UniversityJl. Veterans Dalam No. 26 B, PadangAbstractThe increase in demand for adequate supply of electricity increases with the increase in population. The energy source used today is from PT. PLN Persero. To generate electricity to this day is still dominated by fossil fuels, which is a source of energy that can not be renewed and not environmentally friendly. The Mini Hydro Power Plant is a renewable and environmentally friendly energy source that has the potential to replace fossil fuels. In this research, a feasibility study of mini hydro power plant which is located in West Coast Pesisir Regency of Lampung. This feasibility study, which we need to measure is the number of reliable water debit contained in one of the rivers of Bukit Barisan Selatan National Park (TNBBS). The results showed that Manula river water discharge was Q = 20,32 m3 / s and Beda height or Head = 98 meter able to generate minimum power equal to 17,97 MW. From the results of power that can be generated, mini hydro power plant is feasible to be realized, but the need for further financial review.

scholarly journals Pengendali Putaran Turbin Pltmh Menggunakan Arduino

2020 ◽  
pp. 90-96
Author(s):  
Okta Andrica Putra
Keyword(s):  
Power Plant ◽  
Rotation Speed ◽  
Water Discharge ◽  
Current Source ◽  
Dc Motor ◽  
Dry Season ◽  
Maximum Power ◽  
Servo Motor ◽  
Hydro Power ◽  
Maximum Slope

Research has been carried out to regulate / control the rotation of the turbine for this type of micro hydro power plant (PLTMH). This research was carried out during the dry season where water discharge greatly affects turbine rotation. This tool utilizes an optocoupler sensor, servo motor and 2x16 LCD. This system works based on the turbine rotation speed that is read on the sensor then controls the slope of the water fall using a DC motor. If thewater speed is low, the servo motor will turn CW up to a maximum slope of 75 degrees to produce maximum rotation and maximum power. This research does not focus on the magnitude of the resulting current source and the amount of water discharge

scholarly journals Listrik mikro hidro berdasarkan Potensi debit andalan sungai batanghari kota jambi

2018 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Hendi Matalata
Keyword(s):  
River Water ◽  
River Flow ◽  
Water Discharge ◽  
Drainage System ◽  
Flow Measurements ◽  
Hydro Power ◽  
System A ◽  
Flow Capacity ◽  
Main Discharge

The city of Jambi is an area batanghari river, the study of the utilization of renewable energy, especially hydro power through the tributaries should be considered for the planning of Micro Hydro Power Plant (PLTMH). Water conditions that can be utilized as electricity generating resources have a certain flow capacity and altitude of their drainage system. A major problem in hydroelectric generation is the availability of river water discharge as a propulsion energy. Therefore, certain techniques are needed to predict the potential flow of river water at all times or the river's main discharge that can be used for hydro-electric power generation, no long-term rainfall and critical watershed conditions can cause water flow the stream becomes small and even becomes dry. Manual river flow measurements over time can only represent the volume of river flow at the time of measurement. Changes that occur due to the occurrence of rain at a later time, or decrease in river discharge due to decreased soil water savings, can not be monitored properly it is necessary to plan a continuous discharge for the capacity of generator turbine rotation by calculating the electrical capacity of the generator which can be generated optimally

scholarly journals Pengaruh jumlah nozzle terhadap kinerja turbin pelton sebagai pembangkit listrik di Desa Sumber Agung Kecamatan Suoh Kabupaten Lampung Barat

2020 ◽  
Vol 9 (2) ◽  
Author(s):  
Dwi Irawan ◽  
Eko Nugroho ◽  
Eko Widiyanto
Keyword(s):  
Power Plant ◽  
Power Efficiency ◽  
Mechanical Energy ◽  
Water Discharge ◽  
Electrical Energy ◽  
Outer Diameter ◽  
Impulse Turbine ◽  
Turbine Wheel ◽  
Hydro Power ◽  
Turbine Efficiency

A micro hydro power plant, or commonly known as a turbine is a power plant that utilizes the potential energy of water to be converted into mechanical energy which is then converted into electrical energy using a generator. The Pelton turbine is an extension of the impulse turbine with a split some blades dividing the jet into two equal beaks which are reversed sideways at the turbine wheel. This study aims to determine the effect of the number of nozzles to output power, efficiency, and electric power produced. In this study, a Pelton type water turbine was applied to a water source flowing from the mountains with a head of 26 m and 0.003167 m3/s water discharge. This study used 3 variations of the number of nozzles (single, double, and triple nozzle) with 9 mm outer diameter of nozzle and 35 mm nozzle length. The results of the research conducted, the turbine power is 419.53 watts, the turbine efficiency is 52%, and the generator power is 360 Watts for triple nozzle variation. The turbine power obtained is 388.83 Watts, the turbine efficiency is 48%, and the generator power is 234 Watts for double nozzle variation. And the power obtained is 367.47 Watts, the turbine efficiency is 45%, and the generator power is 175 Watts for single nozzle variations.

UJI TERAP PEMBANGKIT LISTRIK TENAGA AIR SKALA PICOHYDRO DI KABUPATEN BANJARNEGARA

2017 ◽  
Vol 15 (2) ◽  
pp. 189-206
Author(s):  
Rachman Djamal ◽  
Tri Risandewi
Keyword(s):  
Power Plant ◽  
Water Discharge ◽  
Early Morning ◽  
Dry Season ◽  
Turbine Generator ◽  
Technical Application ◽  
The People ◽  
Water Container ◽  
Water Mill ◽  
Overflow Channel

This study aims to determine the technical application of picohydro power plant (making design and application test) in Pandansari Village, Wanayasa District, Banjarnegara Regency. The result of technical analysis of picohydro power plant is capable of producing 7.200 watt or 7,2 kilowatts of electric power. Based on the observation and calculation of water discharge in July-August 2017, the water debit required to run the generator on picohydro power plant is insufficient (less than 30 liters / sec) due to the months already entering the dry season in Banjarnegara Regency and also because some of the water debit is used by waterwheel to increase water supply to the water container / reservoir belonging to the people of Pandansari Village. During the dry season, the picohydro power plant can be used when operated alternately with a water mill or set the time of use for each water mill used in the morning until late afternoon, while the picohydro power plant is used during the afternoon until night or early morning when people need electricity for their daily needs. The next alternative is to place a second picohydro / turbine generator under the first turbine utilizing waste water from the first turbine with a height difference of at least 2 meters or more. If during the rainy season, there is a very heavy flow of water from above then the overflow can be disbursed / dumped down through the overflow channel so that the performance of the picohydro generator is not disturbed

Danube Field Excursion 1988: Tritium Content of River Water; Radioactivity of Danube Sediments

1990 ◽  
Vol 22 (5) ◽  
pp. 203-210 ◽  
Author(s):  
D. Rank ◽  
F. J. Maringer ◽  
W. Papesch ◽  
V. Rajner
Keyword(s):  
River Water ◽  
Bottom Sediments ◽  
Nuclear Power ◽  
Radioactive Material ◽  
Reactor Accident ◽  
Tritium Content ◽  
Fine Sediments ◽  
Fish Samples ◽  
Field Excursion

Water, sediment, and fish samples were collected during the Danube excursion 1988, within a coordinated sampling program of the Radiology Working Group of the “Internationale Arbeitsgemeinschaft Donauforschung ” (K.Hübel, Munich; I. Kurcz, Budapest; D.Rank, Vienna). The H-3 content of the river water and the radioactivity of the bottom sediments were measured at the BVFA Arsenal, Vienna. The determined H-3 content of the Danube water corresponds with the long-term trend in the H-3 content of the hydrosphere; the values lie in the range of 3 Bq/kg downstream from Belgrade, upstream from Belgrade they are about 4 Bq/kg. It was only in the waste water plume of the nuclear power station of Kozloduj that a slightly elevated H-3 value - 6 Bq/kg - was determined. The content of the sediments of artificial radionuclides was found, at the time of the Danube field excursion, to be almost exclusively due to the radioactive material released following the reactor accident at Chernobyl in April 1986 (mainly Cs-137 and Cs-134). As a consequence of the air currents and precipitation conditions prevailing at the time of the accident, the bottom sediments in the lower course of the Danube were less contaminated than those in the upper course. The fine sediments were found to contain over 3000 Bq/kg of Cs-137 in the upper course of the Danube.

Design Technique of High Power Efficiency LLC DC-DC Converters for Photovoltaic Cells

2018 ◽  
Vol 2 (1) ◽  
pp. 30
Author(s):  
Hisatsugu Kato ◽  
Yoichi Ishizuka ◽  
Kohei Ueda ◽  
Shotaro Karasuyama ◽  
Atsushi Ogasahara
Keyword(s):  
High Power ◽  
Power Efficiency ◽  
Photovoltaic Cells ◽  
Input Voltage ◽  
Design Technique ◽  
Load Range ◽  
Voltage Range ◽  
Simulation Results ◽  
Secondary Side ◽  
High Power Efficiency

This paper proposes a design technique of high power efficiency LLC DC-DC Converters for Photovoltaic Cells. The secondary side circuit and transformer fabrication of proposed circuit are optimized for overcoming the disadvantage of limited input voltage range and, realizing high power efficiency over a wide load range of LLC DC-DC converters. The optimized technique is described with theoretically and with simulation results. Some experimental results have been obtained with the prototype circuit designed for the 80 - 400 V input voltage range. The maximum power efficiency is 98 %.

scholarly journals Machine-Learning Assisted Optimisation of Free-Parameters of a Dual-Input Power Amplifier for Wideband Applications

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2831
Author(s):  
Teng Wang ◽  
Wantao Li ◽  
Roberto Quaglia ◽  
Pere L. Gilabert
Keyword(s):  
Power Amplifier ◽  
Power Efficiency ◽  
Average Power ◽  
Long Term Evolution ◽  
Input Power ◽  
Global Optimisation ◽  
Power Ratio ◽  
Term Evolution ◽  
Free Parameters

This paper presents an auto-tuning approach for dual-input power amplifiers using a combination of global optimisation search algorithms and adaptive linearisation in the optimisation of a multiple-input power amplifier. The objective is to exploit the extra degrees of freedom provided by dual-input topologies to enhance the power efficiency figures along wide signal bandwidths and high peak-to-average power ratio values, while being compliant with the linearity requirements. By using heuristic search global optimisation algorithms, such as the simulated annealing or the adaptive Lipschitz Optimisation, it is possible to find the best parameter configuration for PA biasing, signal calibration, and digital predistortion linearisation to help mitigating the inherent trade-off between linearity and power efficiency. Experimental results using a load-modulated balanced amplifier as device-under-test showed that after properly tuning the selected free-parameters it was possible to maximise the power efficiency when considering long-term evolution signals with different bandwidths. For example, a carrier aggregated a long-term evolution signal with up to 200 MHz instantaneous bandwidth and a peak-to-average power ratio greater than 10 dB, and was amplified with a mean output power around 33 dBm and 22.2% of mean power efficiency while meeting the in-band (error vector magnitude lower than 1%) and out-of-band (adjacent channel leakage ratio lower than −45 dBc) linearity requirements.

scholarly journals Effect of long term aging on Microstructure and precipitates of valve bolts in power plant

2021 ◽  
Vol 1802 (2) ◽  
pp. 022038
Author(s):  
Jiawei Wang ◽  
Qingsong Li ◽  
Xiufang Gong ◽  
Wensheng Yang ◽  
Tianjian Wang ◽  
...  
Keyword(s):  
Power Plant
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