scholarly journals Creation of Optimal Design of Runner Oil System of Kaplan Hydro-Turbines

2021 ◽  
Vol 24 (3) ◽  
pp. 21-26
Author(s):  
Viktor H. Subotin ◽  
◽  
Oleksandr S. Burakov ◽  
Viktor M. Iefymenko ◽  
Andrii Yu. Starchenko ◽  
...  
Keyword(s):  
Control System ◽  
Optimal Design ◽  
Electric Power ◽  
Power Plants ◽  
System Control ◽  
Operational Experience ◽  
Automatic Unit ◽  
Hydro Power ◽  
The Creation ◽  
Hydro Turbines

The main objectives of the reconstruction are stated. Those are: increase of the service life of the hydro-turbines of Dnipro Cascade, enhancement of their efficiency, power, and environmental safety, extension of the power control range of the hydro-power plants, assurance of the reliability and improvement of the operating safety of their equipment and structures, meeting the environmental requirements, improvement of the quality of the generated electric power after control system rehabilitation. The article deals with and analyses the chronology of the creation of the optimal design for a vertical Kaplan hydro-unit oil piping taking into consideration the half a century operational experience and stages of hydro-turbine modernization for Dnipro-2 HPP. The experience in improvement of the hydro-unit and oil head system control design is generalized, from the unified solution to the creation of the all-new design. The methods of the oil system rod machining and preliminary control are amended. The temperature control of the automatic unit shutdown in case of heating of oil head bushes is introduced into the control system. The oil piping installation method is improved and step-by-step checking of the oil piping installation centering is introduced. As a result of implementation of a package of design and process engineering solutions, the optimal design of the oil piping of improved reliability was created. It decreased the unscheduled downtime of the units and cut expenses on their maintenance providing the cyclic recurrence recommended by the standards for the operation of the oil pressure device pumps and thus, decreased the electric power consumption for balance-of-plant needs. The objects of the implementation of the developed oil piping design are given.

Renewable Hydrogen Production Using Sailing Ships

2011 ◽  
Author(s):  
Max F. Platzer ◽  
Nesrin Sarigul-Klijn ◽  
J. Young ◽  
M. A. Ashraf ◽  
J. C. S. Lai
Keyword(s):  
Electric Power ◽  
Wind Power ◽  
Power Output ◽  
Power Plants ◽  
Sea Water ◽  
Water Electrolysis ◽  
Strong Wind ◽  
Hydro Power ◽  
Power Extraction ◽  
Wind Currents

Vast ocean areas of planet Earth are exposed year-round to strong wind currents. We suggest that this untapped ocean wind power be exploited by the use of sailing ships. The availability of constantly updated meteorological information makes it possible to operate the ships in ocean areas with optimum wind power so that the propulsive ship power can be converted into electric power by means of ship-mounted hydro-power generators. Their electric power output then is fed into ship-mounted electrolyzers to convert sea water into hydrogen and oxygen. In this paper we estimate the ship size, sail area and generator size to produce a 1.5 MW electrical power output. We describe a new oscillating-wing hydro-power generator and present results of model tests obtained in a towing tank. Navier-Stokes computations are presented to provide an estimate of the power extraction efficiency and drag coefficient of such a generator which depends on a range of parameters such as foil maximum pitch angles, plunge amplitude, phase between pitch and plunge and load. Also, we present a discussion of the feasibility of sea water electrolysis and of the re-conversion of hydrogen and oxygen into electricity by means of shore-based hydrogen-oxygen power plants.

scholarly journals Analisis Ketidakstabilan Tegangan dan Frekuensi Pada Pembangkit Listrik Tenaga Mikrohidro Soko Kembang

2019 ◽  
Vol 11 (2) ◽  
pp. 129-137
Author(s):  
Nurul Dyah Pratiwi ◽  
Isdiyato Isdiyato
Keyword(s):  
Power Plant ◽  
Electric Power ◽  
Rotational Speed ◽  
Power Plants ◽  
Synchronous Generator ◽  
Frequency Instability ◽  
Small Scale ◽  
Hydro Power ◽  
Central Java ◽  
Hydro Power Plants

Microhydro power plant (MPP) is a small-scale power plant that uses water energy. The process of energy change occurs in a device called a synchronous generator. when the synchronous generator is given an arbitrary load, then the voltage will change. These results cause voltage and frequency instability. This research was conducted to analyze the voltage and frequency instability in MPP. The research method used in this research is descriptive quantitative approach in the village of Soko Kembang, Petungkriyono District, Pekalongan Regency, Central Java. This study provides an overview and explanation of the problems regarding the voltage and frequency instability of Micro Hydro Power Plants. The results of this study are the highest and lowest voltage / frequency instability values, namely 235 volts / 51 Hz and 160 volts / 44 Hz, due to the influence of changes in load current, which can affect the rotational speed of the generator changes, resulting in unstable voltage and frequency generated by the generator, the rotational speed of the generator changes, resulting in unstable voltage and frequency generated by the generator. The solution is  add water power to rotate the shaft of the turbine and generator to be tighter, so that it can reduce the value of the decrease in electric power by losses to the turbine and generator. Large electric power can increase voltage and frequency without having to adjust the load, and the need for improvement of the ELC system in order to get a more effective value of voltage and frequency stability.  

Short-term forecasting model for electric power production of small-hydro power plants

2013 ◽  
Vol 50 ◽  
pp. 387-394 ◽  
Author(s):  
Claudio Monteiro ◽  
Ignacio J. Ramirez-Rosado ◽  
L. Alfredo Fernandez-Jimenez
Keyword(s):  
Electric Power ◽  
Power Plants ◽  
Power Production ◽  
Forecasting Model ◽  
Short Term ◽  
Hydro Power ◽  
Electric Power Production ◽  
Hydro Power Plants ◽  
Short Term Forecasting

Renewable Hydrogen Production Using Sailing Ships

2014 ◽  
Vol 136 (2) ◽  
Author(s):  
Max F. Platzer ◽  
Nesrin Sarigul-Klijn ◽  
J. Young ◽  
M. A. Ashraf ◽  
J. C. S. Lai
Keyword(s):  
Electric Power ◽  
Wind Power ◽  
Power Output ◽  
Power Plants ◽  
Sea Water ◽  
Water Electrolysis ◽  
Strong Wind ◽  
Hydro Power ◽  
Power Extraction ◽  
Wind Currents

Vast ocean areas of planet Earth are exposed year-round to strong wind currents. We suggest that this untapped ocean wind power be exploited by the use of sailing ships. The availability of constantly updated meteorological information makes it possible to operate the ships in ocean areas with optimum wind power so that the propulsive ship power can be converted into electric power by means of ship-mounted hydro-power generators. Their electric power output then is fed into ship-mounted electrolyzers to convert sea water into hydrogen and oxygen. In this paper, we estimate the ship size, sail area, and generator size to produce a 1.5 MW electrical power output. We describe a new oscillating-wing hydro-power generator and present results of model tests obtained in a towing tank. Navier-Stokes computations are presented to provide an estimate of the power extraction efficiency and drag coefficient of such a generator which depends on a range of parameters such as foil maximum pitch angles, plunge amplitude, phase between pitch and plunge and load. Also, we present a discussion of the feasibility of sea water electrolysis and of the reconversion of hydrogen and oxygen into electricity by means of shore-based hydrogen-oxygen power plants.

scholarly journals ELECTRIC POWER PRODUCED BY NON-SELF-PROPELLED HYDRO POWER VESSEL

2018 ◽  
pp. 92-102
Author(s):  
Liudmila Fedorovna Borisova ◽  
Aleksandr Nikolaevich Korobko
Keyword(s):  
Power Plant ◽  
Electric Power ◽  
Power Plants ◽  
Structural Characteristics ◽  
Plant Design ◽  
Power Module ◽  
Tidal Power ◽  
Energy Potential ◽  
Tidal Power Plant ◽  
Hydro Power

The article contains the method of calculating the electric capacity by a non-self-propelled hydro power vessel which uses renewable tidal power to produce electricity. The vessel is built by means of reconstructing tankers that are in service or to be disposed and can be characterized as a power generating module of a floating non-self-propelled tidal power plant of continuous operation. To evaluate efficiency of the power generated module there has been worked out a method of calculating its generated energy, which allows for local energy potential of the tidal flow, structural characteristics of the module and its geographical position. Based on the developed method there has been given analysis of power generated by one electric power module which can be made by means of construction minor modifications of a standard tanker design. The calculation data obtained were analyzed in comparison with power capacity of small hydroelectric power plants operating in the north-west parts of Russia and with capacity of Kislogubskaya tidal power plant. The tidal power plants can generate electric power comparable with the capacities of tidal (marine) and river-type power plants. The economic benefit of the proposed power plant design is obtained due to significant reduction of costs for implementing floating tidal power plant, compared to the costs of the construction of tidal and hydroelectric stations. The floating tidal power plant is characterized by mobility and can be towed to any coastal zone where the tidal wave parameters are acceptable. When needed, capacity of the floating tidal power plant can be raised by means of attaching additional modules. Mounting and operating of tidal power plants are environmentally secure. The use of tidal power plants is a promising means of electrification for inaccessible and marginal coastal areas.

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