Alpen Steel | Renewable Energy

Rubrik ini adalah kumpulan artikel tentang energi yang di-upload oleh para member kami. Semoga bermanfaat bagi pengunjung yang ingin: mencari kumpulan referensi tentang energi, mengetahui seluk beluk tentang energi terbarukan secara khusus, mengaplikasikan energi terbarukan dilingkungannya. 

Teknologi energi adalah teknologi yang terkait dengan bidang-bidang mulai dari sumber, pembangkitan, penyimpanan, konversi -energi dan pemanfaatannya untuk kebutuhan manusia. Sektor kebutuhan utama yang paling besar dalam jumlah untuk massa mendatang adalah sektor kelistrikan dan sektor transportasi. Sumber energi dapat digolongkan menjadi dua bagian yaitu energi terbarukan dan energi tak terbarukan. Dalam pembangkitan energi beberapa sistem pembangkitan yang telah digunakan untk memenuhi kebutuhan energi didunia, seperti: pembangkit listrik tenaga air /PLTA, pembangkit listrik tenaga surya/PLTS, pembangkit listrik tenaga uap dan gas/PLTU,PLTG, pembangkit listrik panas bumi/PLTP, pembangkit listrik tenaga angin/bayu/PLTB, pembangkit listrik tenaga gelombang laut/PLTGL, dan pembangkit listrik tenaga nuklir/PLTN. Dari Wikipedia bahasa Indonesia, ensiklopedia bebas.



~ The Work Process Of Wind Turbine

How a wind turbine works

Wind power involves converting wind energy into electricity by using wind turbines. A wind turbine is composed of 3 propellers-like blades called a rotor. The rotor is attached to a tall tower. The tower looks like a very tall pole. On average wind towers are about 20m high. The reason why the tower is so tall is because winds are stronger higher from the ground.

 

horizontal and vertical axis wind turbine
Vertical and horizontal axis  turbines used for residential electricity generation
Buy wind turbines online in our secure store!

 Wind comes from atmospheric changes; changes in temperature and pressure makes the air move around the surface of the earth; all of which is triggered by the sun. So in a way, wind energy is another form of solar power. A wind turbine captures the wind to produce energy. The wind makes the rotor spin; as the rotor spins, the movement of the blades spinning gives power to a generator which makes energy. The motion of the wind turbine turning is called kinetic energy, this power is converted into electricity.

  The conversion of wind into electricity

 Wind power is converted into electricity by magnets moving past stationary coils of wire known as the stator. As the magnets pass the stator, AC electricity is produced. It is then converted into DC electricity which can be used to charge batteries which store the electrical energy or can also be fed into a grid interactive inverter for feeding power into the electricity grid.

 The benefits of wind power

 Wind power is a clean energy source that can be relied on for the long-term future. A wind turbine creates reliable, cost-effective, pollution free energy. It is affordable, clean and sustainable. One wind turbine can be sufficient to generate energy for a household. Because wind is a source of energy which is non-polluting and renewable, wind turbines create power without using fossil fuels, without producing greenhouse gases or radioactive or toxic waste. Wind power reduces global warming.

 How are wind turbines installed

  Wind turbines can be installed on properties, on boats, or caravans. Getting a wind turbine depends entirely on the amount of wind generated in your area. The first thing you need to do is to find out the average speed in your area.

 The average wind speed needs to be above 5m/s (18km per hour) to make installing a wind turbine worthwhile. Ideal locations for wind turbines are in the country, on farms, or on the coast: basically anywhere away from built-up areas. The more buildings around the wind turbine, the less wind there is. Energy Matters can do full installations of hybrid, wind and solar energy systems. Setting up a wind turbine is a big job that takes time but it can be a very cost effective way of creating power as long as the average wind speed is high enough.

 In certain cases, installing a wind turbine can be even better than installing solar panels because it can create a bigger mass of the energy required. Learn more about wind energy vs. solar power or read our guide - Is Wind Power Right For You?

 Buy wind turbines online in our secure store! If you have any questions, please don't hesitate in contacting our friendly team!

 

 

~ All About Wiind Turbine

Wind Turbine Energy

What are the benefits of of wind energy?

The production of wind energy creates no air pollution and, if the turbines are sited properly, has minimal environmental impact. By including wind generation in Green Power Switch, TVA and the distributors of TVA electricity are introducing this clean technology to the Tennessee Valley. This is the first commercial-scale use of wind power to generate electricity in the southeastern United States.

What is the role of wind energy in Green Power Switch?

With the inauguration of TVA’s expanded wind site in December 2004, wind energy became a major source of power supply for Green Power Switch. Fifteen new turbines were added to the TVA wind site on Buffalo Mountain near Oak Ridge, Tennessee. They are located near the three smaller turbines originally built in 2000. The site is on a two-mile ridge line facing southwest, the predominant wind direction at the location. The newer turbines were built by Invenergy Wind LLC, and TVA is purchasing their output under a 20-year, $60 million power-purchase agreement.

Wind Mills

How much electricity is produced?

The newer turbines expanded the capacity of the Buffalo Mountain site to 29 megawatts of generation, or enough to power about 3,780 homes. They are about 260 feet tall, and the blades are 135 feet long. They have a capacity of 1.8 megawatts each. The three original turbines, with a capacity of 660 kilowatts each, are 213 feet tall, and their blades are 75 feet long. Generally, the higher the tower, the better the access to the wind.

How is wind energy generated?

A turbine and switchgear are mounted at the top of each tower in a casing called a nacelle, and blades are attached to the turbine. The turbines use moving air to produce power by transferring the wind’s momentum to the rotor blades and localizing that energy in a single rotating shaft. The larger turbines rotate at about 15 revolutions per minute. Transformers in the nacelles step up the power to 35 kilovolts (kV), and it’s stepped up again to 161 kV at the substation located on the mountain. The substation connects to an existing TVA transmission line. The three smaller turbines are connected to the TVA system through a partnership arrangement with Clinton Utilities Board.

Do wind turbines produce electricity all the time?

Energy is generated when the wind speed reaches about 10 miles per hour, and a speed of 25 miles per hour allows the turbines to generate at their rated capacity. They shut down when the wind exceeds 55 miles per hour. Although wind speed varies according to the time of day, season, height above ground, and terrain, the proper placement of a wind turbine in a breezy location away from large obstructions enhances its performance.

Are the wind turbines noisy?

Large modern turbines are very quiet. At distances of more than 650 feet, the swishing sound of the rotor blades is usually masked completely by wind noise in the leaves of trees or shrubs. The turbine sites will be distant enough from neighbors so that people won’t hear any sound at all unless they’re standing close to the towers.

Will the turbines interfere with radio and TV signals?

No. In fact, some turbines even double as communications towers — for cellular phone transmitters, among other things. The turbine blades are made not of metal but of glass-reinforced epoxy (a material similar to fiberglass), and the turbines are equipped with asynchronous (brushless) generators that don’t create any electrical disturbance. For these reasons the turbines that will be used in the green power program will cause no electromagnetic interference and won’t disrupt radio or television signals.

Q&A

 

~ Jacob Wind Systems

  The Jacobs Wind Systems are on the cutting edge for providing clean, quality, reliable and efficient power in the USA and around the world.

In the energy conscious person of today we see a desire to reduce electrical usage or cut the cost paid for energy consumption.  A Jacobs Wind System can provide you a means of offsetting the ever-rising costs of your electrical energy.

 

 Wind Turbine Industries Corp.


 

 

~ History Of Wind Turbine

 
The world's first automatically operated wind turbine was built in Cleveland in 1888 by Charles F. Brush. It was 60 feet tall, weighed four tons and had a 12kW turbine.[1]

History

Wind machines were used in Persia as early as 200 B.C.[2] The windwheel of Heron of Alexandria marks one of the first known instances of wind powering a machine in history.[3][4] However, the first practical windmills were built in Sistan, Iran, from the 7th century. These were vertical axle windmills which had long vertical driveshafts with rectangle shaped blades.[5] Made of six to twelve sails covered in reed matting or cloth material, these windmills were used to grind corn and draw up water, and were used in the gristmilling and sugarcane industries.[6]

By the 14th century, Dutch windmills were in use to drain areas of the Rhine River delta. In Denmark by 1900 there were about 2500 windmills for mechanical loads such as pumps and mills, producing an estimated combined peak power of about 30 MW. The first known electricity generating windmill operated was a battery charging machine installed in 1887 by James Blyth in Scotland.[7] The first windmill for electricity production in the United States was built in Cleveland, Ohio by Charles F Brush in 1888, and in 1908 there were 72 wind-driven electric generators from 5 kW to 25 kW. The largest machines were on 24 m (79 ft) towers with four-bladed 23 m (75 ft) diameter rotors. Around the time of World War I, American windmill makers were producing 100,000 farm windmills each year, most for water-pumping.[8] By the 1930s windmills for electricity were common on farms, mostly in the United States where distribution systems had not yet been installed. In this period, high-tensile steel was cheap, and windmills were placed atop prefabricated open steel lattice towers.

A forerunner of modern horizontal-axis wind generators was in service at Yalta, USSR in 1931. This was a 100 kW generator on a 30 m (100 ft) tower, connected to the local 6.3 kV distribution system. It was reported to have an annual capacity factor of 32 per cent, not much different from current wind machines.[9] In the fall of 1941, the first megawatt-class wind turbine was synchronized to a utility grid in Vermont. The Smith-Putnam wind turbine only ran for 1100 hours. Due to war time material shortages the unit was not repaired.

The first utility grid-connected wind turbine operated in the UK was built by John Brown & Company in 1954 in the Orkney Islands. It had an 18 meter diameter, three-bladed rotor and a rated output of 100 kW.


 

~ SHARP Membuat Papan Reklame Bertenaga Surya di Indonesia

     

 
Papan Reklame Bertenaga Surya Pertama di Indonesia dari SHARP
 
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Visi SHARP menuju tahun 2012 adalah berkontribusi kepada dunia melalui bisnis yang sadar lingkungan dan kesehatan, fokus pada produk-produk penghasil energi dan hemat energi. Panel Surya PHOTOVOLTAIC sebuah produk pembangkit energi terbarukan yang menghasilkan listrik dari intensitas cahaya matahari, merupakan salah satu bukti nyata dan jawaban yang diberikan oleh SHARP.

Hampir semua kegiatan perkantoran, industri maupun rumah tangga membutuhkan energi listrik. Sedemikian vitalnya hingga manusia berusaha membangun pembangkit-pembangkit tenaga listrik dalam skala ukuran dan macam untuk memenuhi kebutuhan energi listrik mereka.

Dari data terakhir yang di dapat dari PLN konsumsi listrik untuk triwulan kedua 2009 adalah sebesar 64,8 tera watt hour (TWh). Di DKI Jakarta sendiri, proporsi terbanyak adalah pengguna listrik bisnis dan rumah tangga. Sedangkan konsumsi listrik satu papan reklame yang berdurasi 6 jam per hari, rata-rata membutuhkan energi listrik sebanyak 192.000 KWh, yang mampu menyalakan satu buah desa kecil.

Salah satu gerakan hemat energi yaitu dengan hemat bahan bakar dan menggunakan bahan bakar dari non-fosil yang dapat diperbaharui seperti tenaga angin, tenaga air, energi panas bumi, dan tenaga matahari. Duniapun sudah mulai merubah tren produksi dan penggunaan bahan bakarnya, dari bahan bakar fosil beralih ke bahan bakar non-fosil, terutama tenaga surya yang tidak terbatas.

SHARP sadar dan peduli akan kuatnya tenaga surya selama lebih dari 40 tahun, dan menjadi salah satu perusahaan pertama di dunia yang menyadari hal ini serta menjadi salah satu produsen panel sel surya (solar cell) terkemuka di dunia, PHOTOVOLTAIC (PV).

Kini, SHARP melakukan terobosan terbaru melalui proyek perdana dengan menggunakan panel surya PHOTOVOLTAIC sebagai sumber energi listrik pada salah satu papan reklame SHARP yang berlokasi di jalan protokol MH. Thamrin, Jakarta Pusat.

 “Kami berharap dengan mengganti energi listrik dengan energi matahari pada papan reklame kami mampu memberikan kontribusi yang signifikan pada lingkungan,” demikian yang dikatakan oleh Ryunosuke Kitagawa, Brand Strategy Group Director PT SHARP Electronics Indonesia.

Proses pengerjaan dari proyek ini memakan waktu selama 3 bulan, dimulai pada Juli 2009 yaitu proses perencanaan dan perancangan. Dilanjutkan pada Agustus 2009 dengan proses rekonstruksi papan reklame, diikuti pemasangan panel surya, dan uji coba sistem pengoperasian papan reklame. Kemudian pada bulan September 2009, papan reklame SHARP yang menggunakan energi surya sebagai sumber listrik sudah mulai dioperasikan.

“Kedepannya SHARP berharap seluruh papan reklame di Indonesia menggunakan sistem panel surya sebagai pengganti energi listrik untuk menghemat energi,” kata Presiden Direktur PT SHARP Electronics Indonesia Fumihiro Irie.

Sebelumnya perusahaan elektronik ternama ini sudah lama mendukung program-program hemat energi, diantaranya adalah memadamkan seluruh billboardnya se-Jawa dan Bali pada perayaan Earth Day tahun 2008 dan ikut serta mendukung gerakan Earth Hour 2009 pada Maret 2009 lalu. Pada kegiatan sehari-hari SHARP juga menerapkan hemat energi dengan cara memadamkan listrik pada saat jam istirahat selama satu jam dan menggunakan air secukupnya.

Di masa mendatang SHARP akan terus menghasilkan produk-produk ramah lingkungan, hemat energi, dan tahan lama seperti produk panel surya PHOTOVOLTAIC serta produk-produk elektronik lain dari SHARP yang memang sudah terbukti kualitasnya.      

Sekilas Tentang PHOTOVOLTAIC:
SHARP sudah memulai R&D yang terfokus terhadap tenaga surya dan memproduksi panel sel surya PHOTOVOLTAIC untuk pertama kalinya di tahun 1959. PHOTOVOLTAIC SHARP telah terbukti dapat diimplementasikan dari luar angkasa sampai rumah seperti pada mercu suar tahun 1966, satelit Jepang tahun 1976, pabrik LCD TV AQUOS Kameyama 1 & 2 hingga kini, dan lainnya. Penggunaan modul SHARP PHOTOVOLTAIC secara meluas dapat mencegah perubahan iklim yang disebabkan oleh global warming. PHOTOVOLTAIC SHARP pertama kali diperkenalkan di Indonesia pada tahun 1980an.

Kelebihan PHOTOVOLTAIC SHARP dibandingkan pembangkit tenaga listrik lainnya :
•    bersih & bebas polusi
•    beroperasi tanpa ada bagian yang perlu dibongkar pasang
•    menghasilkan listrik tanpa suara
•    hampir tidak memerlukan perawatan
•    listrik yang dihasilkan dapat dipergunakan untuk keperluan apapun dan di manapun  tidak perlu investasi besar ataupun
     pengecekan keamanan seperti industri nuklir
•    tidak memerlukan biaya transportasi (atau resiko) seperti minyak, batubara, uranium dan plutonium
•    awet dan tahan lama

Cara kerja sistem Pembangkit Listrik Tenaga Surya dengan menggunakan Grid-Connected panel sel surya PHOTOVOLTAIC SHARP untuk perumahan : Modul sel surya PHOTOVOLTAIC SHARP merubah energi surya menjadi arus listrik DC. Arus listrik DC yang dihasilkan ini akan dialirkan melalui suatu inverter (pengatur tenaga) yang merubahnya menjadi arus listrik AC, dan juga dengan otomatis akan mengatur seluruh sistem. Listrik AC akan didistribusikan melalui suatu panel distribusi indoor yang akan mengalirkan listrik sesuai yang dibutuhkan peralatan listrik. Besar dan biaya konsumsi listrik yang dipakai di rumah akan diukur oleh suatu Watt-Hour Meters.

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Dua penari sedang menunjukkan kebolehannya pada saat konferensi pers dan
peluncuran papan reklame SHARP pertama di Indonesia yang
menggunakan tenaga surya sebagai sumber energi.


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Ki-Ka: Hanadi (Product Marketing Photovoltaic SEID), Fumihiro Irie (President Director SEID),
Ryunosuke Kitagawa (Brand Strategy Group Director SEID) dan Ayu Diandra Sari
(Puteri Indonesia Lingkungan Hidup) berbincang pada saat konferensi pers dan peluncuran papan reklame
SHARP pertama di Indonesia yang menggunakan tenaga surya sebagai sumber energi.


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Suhei Arai (Ass.GM Marketing SEID), R. Kitagawa (Brand Strategy Group Director SEID),
Fumihiro Irie (President Director SEID), Rospen Sitinjak (Wakil Walikota Jakarta Pusat),
Ario Subijoko (Manager Komunikasi Sekretaris Perusahaan PLN), Didi Oerip Affandi

 

 
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