scholarly journals Simulated Analysis and Review of Ocean Wave Power Generators

2018 ◽  
Vol 7 (4.35) ◽  
pp. 1 ◽  
Author(s):  
Sami Salama Hussen Hajjaj ◽  
Ahmad Faizuddin Bin Ahmad Nazri
Keyword(s):  
Electrical Power ◽  
Ocean Waves ◽  
Wave Power ◽  
Sea Waves ◽  
Power Generator ◽  
Power Generators ◽  
Economic Problems ◽  
The World ◽  
Simulated Analysis ◽  
Real Challenge

With the exponential rise in human population, the need for energy is becoming a real challenge to many countries around the world. Shortages in fossil sources of energy and its rising prices are beginning to cause many socio-economic problems and unrest in many parts of the world. This brings the need and importance of finding alternative and reliable sources of power. In recent years, the power of ocean waves began to attract attention. In this article, a design of the Wave Power Generator device is presented. This design is introduced to improve the efficiency. The proposed design is compared with an existing device that exploits the sea waves, converting the its energy to electrical power. This study aims to show that the instrument would achieve a higher efficiency by generating a greater total of electricity with the appropriate design and focus. The study is simulated using MATLAB. Results of the study show the electricity energy generated improved up to 80% in contrast to the present instrument. The results of this work could lead the way towards more active implementations of wave power generators and the use of sustainable energy resources.

A Renewable Source of Hydroelectricity

2013 ◽  
Vol 310 ◽  
pp. 399-402
Author(s):  
Saleh A. Aboukhres ◽  
Ali S. Zayed ◽  
Hisham A. Ayad ◽  
S. Ganesan
Keyword(s):  
Kinetic Energy ◽  
Mechanical Energy ◽  
Pressure Fluctuations ◽  
Ocean Waves ◽  
Wave Power ◽  
Sea Waves ◽  
Power Devices ◽  
Regular Form ◽  
The World ◽  
Different Parts

The Sea-waves, as a kinetic energy, is one of the renewable sources of energy which can be harnessed to generate electricity. Wave power devices extract energy directly from the surface motion of sea (ocean) waves or from pressure fluctuations below the surface. A variety of technologies have been proposed to capture the energy from waves and some of the more promising designs are undergoing demonstration testing at economical scales. In this research, the irregular kinetic energy in sea waves is to be converted to a stored potential energy and used in a regular form, with conversion once again to mechanical energy, for driving a turbine which to be connected to an electricity generator through a gear box. Wave power varies considerably in different parts of the world and wave energy cannot be harnessed effectively everywhere. Because sea waves may become ineffective for a period of time, this research is concerned with the storage of energy in one of its forms.

scholarly journals Pollution Problems in Koya City due to Private Electrical Generators

2019 ◽  
Vol 7 (2) ◽  
pp. 38-46
Author(s):  
Hayder H. Abbas ◽  
Fakhri H. Ibraheem ◽  
Ahmed A. Maaroof
Keyword(s):  
Environmental Problem ◽  
Electrical Power ◽  
Environmental Pollutants ◽  
Power Production ◽  
Negative Effects ◽  
Power Generators ◽  
Number Of Generators ◽  
The World ◽  
Carbon Dioxide Co2 ◽  
Annual Amount

Koya city, like any other city in the world, faces a critical environmental problem which is global warming and the increase in the rate of production of gaseous pollutants. This research is involved with the negative effects of private Electrical Power Generators (EPGs) on the environment in Koya City. The environmental pollutants resulted from EPGs were investigated by performing an actual study on land for the number of (EPGs), types, and distribution. Koya city is divided into 18 quarters. The investigation covers a period from 2009 to 2017, included. The production of power was increased due to the increase in the number of generators and supplying hours. The power production in 2009 was 23,850 megawatt (MW) whereas it was 49,635 MW in 2017. The amount of fuel consumed in 2009–2017 was relatively increased from 30,000 to 62,500 barrel/year. The total amount of pollutants was increased by about 108% during the period 2009–2017. The results showed that the most significant increase in pollutants was carbon dioxide (CO2). The annual amount of (CO2) emitted in 2009 was 6588 tons whereas it has increased in 2017–13710 tons. The conclusion of this study was that the highest pollution occurred in the center of Koya City in Nabeel quarter, which represented 22% of the whole pollutants.

scholarly journals Multi-criteria Approach and Wind Farm Site Selection Analysis for Improving Power Efficiency

2020 ◽  
Vol 1 (2) ◽  
pp. 60-70
Author(s):  
Fouad Alhajj Hassan
Keyword(s):  
Power Efficiency ◽  
Wind Farm ◽  
Electrical Power ◽  
Electrical Energy ◽  
Capacity Factor ◽  
Power Exponent ◽  
Negative Effects ◽  
Wake Effect ◽  
Power Generators ◽  
The World

The usage of electrical energy is still increasing around the world, and extending to cover more electrical power based applications. This will lead to more atmosphere changes on the globe in the next decades. Thus, renewable energy must be used in an efficient way to reduce the negative effects of these power generators. The location of the wind farm plays a big role in determining the efficiency of the output power. The aim of this research is to study which turbine configuration suits best for a specific location, taking into consideration all the possible constraints. In order to reach our goal, three different turbines configurations are studied with least possible uncertainties. The optimal configuration is when the wind shear is minimal at the height of the hub, the wake effect is negligible and the capacity factor is maximal (the economical part is not included). In this paper Sorochi Gory (located in Tatarstan, Russia) wind farm site will be explained, analysed. The power exponent and capacity factor will be calculated, and the results are displayed. Doi: 10.28991/HEF-2020-01-02-02 Full Text: PDF

A Prototype of DEAP Ocean Wave Powered Generator

2011 ◽  
Vol 347-353 ◽  
pp. 3430-3433
Author(s):  
Ke Sheng Wang ◽  
Ming Chen
Keyword(s):  
Renewable Energy ◽  
Knowledge Discovery ◽  
Wind Power ◽  
Science And Technology ◽  
Ocean Wave ◽  
Wave Power ◽  
Power Generator ◽  
Power Generators ◽  
Human Power

Ocean wave power is emerging as a particularly attractive form of renewable energy. Dielectric Electric Active Polymers (DEAP) have has been used to transform electrical to mechani¬cal energy in an actuator mode. However it has few applications in a generator mode. This paper introduces a new concept of “New Renewable Energy” and presents a prototype of DEAP ocean wave powered generator, which has been developed at Knowledge Discovery Laboratory (KDL), Norwegian University of Science and Technology (NTNU). The DEAP prototype could be easily extended to other applications such as human-power generator, conventional power generators, and wind power applications.

A Mathematical Model for a Gyroscopic Ocean-Wave Energy Converter

2013 ◽  
Author(s):  
H. Murakami ◽  
O. Rios
Keyword(s):  
Mathematical Model ◽  
Power Generation ◽  
Wave Energy ◽  
Ocean Waves ◽  
Ocean Wave ◽  
Scale Model ◽  
Design Parameters ◽  
Wave Power ◽  
Power Generator ◽  
Ocean Wave Energy

Global attempts to increase generation of clean and reproducible energy have contributed to considerable progress in ocean-wave power-generation technologies. The efficiency of ocean-wave energy converters has improved by almost an order of magnitude in the last decade. In this report, we consider a floating-type gyroscopic ocean-wave power-generator that has proven to generate 50 kW in a prototype test conducted by a Japanese company in 2012. A gyroscopic power generator consists of a buoy, a gimbal, and spinning rotors mounted on a gimbal. The gimbal is installed on the deck of the buoy and rotates when the buoy oscillates or rocks by ocean waves. The gimbal axis is connected to an electric generator. The objectives of our research are to understand quantitatively the mechanisms of gyroscopic ocean-wave power-generators and to improve the component design of the generator to maximize power output. To this end, we develop a mathematical model and a scale model of a gyroscopic ocean-wave power-generator. This integrated approach is to numerically simulate power generation and to clarify the effect of relevant design parameters.

Pemodelan Pembangkit Listrik Tenaga Angin Menggunakan Kendali Pi

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Hilmansyah Hilmansyah ◽  
Risty Jayanti Yuniar ◽  
Ramli Ramli
Keyword(s):  
Wind Turbine ◽  
Wind Power ◽  
Electrical Power ◽  
Settling Time ◽  
Induction Generator ◽  
Power Generator ◽  
Power Generators ◽  
Proportional Integral ◽  
Wind Power Generators

AbstractThe wind can be used as a power generator. Because of Indonesia have a huge potential of wind power made wind power generators to be one the best solution to overcome of limited energy problems. The quality of electrical power is an issue that they encountered in wind power generators. The problem can be the deviation of voltage,  current and frequency can lead to failure or incorrect operation on energy consumer appliances. One of important element in the power generation system is a generator. In this research, conducted simulating and analysis the result of the controlled wind turbine induction generator. Control carried out using PI control (Proportional Integral). Optimal values obtained at kp = 10 and ki = 30 at a wind speed of 12 m / s with a settling time of 3 seconds. Keywords : proportional, integral, induction generator, wind turbine AbstrakAngin dapat dimanfaatkan sebagai salah satu sumber pembangkit tenaga listrik. Mengingat Indonesia merupakan negara yang sangat besar memiliki potensi tenaga angin menjadikan pembangkit listrik tenaga angin menjadi salah satu solusi yang tepat dalam mengatasi masalah keterbatasan energi. Kualitas daya listrik merupakan masalah yang ditemui dalam pembangkit listrik tenaga angin.Masalah tersebut dapat berupa penyimpangan tegangan, arus maupun frekuensi yang dapat menyebabkan kegagalan ataupun kesalahan operasi pada peralatan-peralatan konsumen energi listrik.Salah satu elemen yang penting dalam sistem pembangkitan listrik yaitu generator. Dalam penelitian ini dilakukan simulasi dan analisa hasil pengendalian wind turbine induction generator. Pengendalian dilakukan menggunakan kendali PI (Proportional Integral). Didapatkan nilai optimal pada kp=10 dan ki=30 pada kecepatan angin 12 m/s dengan settling time  3 sekon. Kata kunci :  proportional, integral, generator induksi, turbin angin 

Simulation and Experimental Study of Oscillator for Permanent Magnet Vibration-to-Electrical Power Generator

2013 ◽  
Vol 483 ◽  
pp. 158-161
Author(s):  
Zhi Hua Wang ◽  
Mei Zhang ◽  
Na Li ◽  
Li Wang
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnets ◽  
Electrical Power ◽  
The Finite Element Method ◽  
Sinusoidal Vibration ◽  
Peak Voltage ◽  
Power Generator ◽  
Power Generators ◽  
Calculation Results ◽  
Suitable Structure

This paper presents the simulation and testing of Vibration-to-Electrical Power Generators (VEPG) with different kinds of permanent magnet oscillators for scavenging ambient vibrations. The finite element method is used for magnetic fields calculation. Firstly, single permanent magnet type oscillators are simulated under the sinusoidal vibration. The calculation results show that the permanent magnet oscillator with diameter 20 mm and height 5 mm will realize 4 V peak-peak voltage. Secondly, multiple permanent magnets type oscillators are simulated under the same vibration and comparative studied with the single permanent magnet type. The results show that multiple permanent magnets oscillator with suitable structure will dramatically improve the power density of VEPG. By the end, prototypes with different kinds of oscillators are tested on the condition of sinusoidal vibration. And the experimental results agree well with the simulation ones.

Main problems of import subsumption in domestic engineering, applicable to small-power electric generator installations

2018 ◽  
Vol 1 (1) ◽  
pp. 46-51 ◽  
Author(s):  
A. V. Shelgunov
Keyword(s):  
Low Power ◽  
Import Substitution ◽  
Power Generator ◽  
Small Power ◽  
Domestic Production ◽  
Power Generators ◽  
Electric Generator ◽  
Generating Sets ◽  
Current State ◽  
Generator Sets

Subject: the subject of the study are low-power generator sets with a power of up to 30 kW.Materials and methods: in this paper, the main domestic legislative documents regulating the requirements for products. An assessment is made of the current state of Russian engine building.Results: the detailed analysis of the modern domestic market of power generating units with a capacity of up to 30 kW is made, the main problems in the field of domestic production of  electric power generators in the range up to 30 kW are revealed, and the prospects for import substitution of gasoline and diesel engines are noted.Conclusions: almost complete absence of the market of domestic low-power generating sets is established, insufficient measures taken to support domestic producers are noted, measures are  proposed for the development of domestic production of power units in the range of up to 30 kW.

Comparative Study Of Islamic Economic Law And The Capitalist

2018 ◽  
Vol 16 (2) ◽  
pp. 104
Author(s):  
Tesa Mellina ◽  
Mohammad Ghozali
Keyword(s):  
Economic System ◽  
Capitalist System ◽  
Economic Problems ◽  
Economic Law ◽  
The Poor ◽  
Economic Practice ◽  
The World ◽  
Islamic Economic ◽  
Economic Injustice ◽  
Islamic Values

The implementation ofthe capitalist system has eliminated the Islamic values in economic practice. After the financial crisis hit the world, the capitalist system reaped many questions and its greatnessbegins to be doubted. The capitalist system implementationprecisely creates new problems in the economy. The concept of individualism which is the main key in capitalist practice only creates economic injustice and misery of the poor. The only economic theory that is expected as a light in dealing with economic problems is an economic system that is able to create justice,the welfare of all parties and blessings both the world and the hereafter. The theory is the Islamic economics which in practice is inseparable from Islamiceconomic law. Islamic economic law that underlies the Islamic economic system is totally different from the capitalist economic system.Keywords: Islamic Economic Law; Islamic economics; Capitalist Economy

Identifying the best practices in green operations strategy of hospitals

2019 ◽  
Vol 26 (4) ◽  
pp. 1106-1131 ◽  
Author(s):  
Yazan Khalid Abed-Allah Migdadi ◽  
Abeer Ahmad Omari
Keyword(s):  
Best Practices ◽  
Waste Management ◽  
Electrical Power ◽  
Global Reporting Initiative ◽  
Operations Strategy ◽  
Content Type ◽  
Hazardous Waste Management ◽  
The World ◽  
Sustainability Reports ◽  
Two Stages

Purpose The purpose of this paper is to identify the best practices in the green operations strategy of hospitals. Design/methodology/approach A total of 25 cases from all over the world were investigated. The source of data was the annual sustainability reports that were retrieved from Global Reporting Initiative (GRI) database. The present research adopted the benchmarking method and the quantitative content analysis of sustainability reports. Then, the indicative models of best practices were developed by using two analysis approaches; within cluster analysis and across clusters analysis. Findings This study found four major taxonomies of green operation strategy in hospitals. The significant strategic groups were resources/waste management; electrical power management; non-hazardous waste management; and emissions/resources management. Indicative models for the relationship between actions and key green performance indicators were developed in the two stages of the analysis. Originality/value The best practices of green operations strategies in hospitals have not so far been investigated. Countries around the world should obey the new regulations for their environmental footprint; if they do, it will exert pressure on all sectors and organizations at all levels to take immediate steps to measure and improve their environmental performance.

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