WIND ENERGY

Wind Energy Basics

Basic information on wind energy and wind power technology, resources, and issues of concern.
Wind Energy and Wind Power

Wind is a form of solar energy. Winds are caused by the uneven heating of the atmosphere by the sun, the irregularities of the earth's surface, and rotation of the earth. Wind flow patterns are modified by the earth's terrain, bodies of water, and vegetative cover. This wind flow, or motion energy, when "harvested" by modern wind turbines, can be used to generate electricity.
How Wind Power Is Generated

The terms "wind energy" or "wind power" describe the process by which the wind is used to generate mechanical power or electricity. Wind turbines convert the kinetic energy in the wind into mechanical power. This mechanical power can be used for specific tasks (such as grinding grain or pumping water) or a generator can convert this mechanical power into electricity to power homes, businesses, schools, and the like.

Wind Turbines

Wind turbines, like aircraft propeller blades, turn in the moving air and power an electric generator that supplies an electric current. Simply stated, a wind turbine is the opposite of a fan. Instead of using electricity to make wind, like a fan, wind turbines use wind to make electricity. The wind turns the blades, which spin a shaft, which connects to a generator and makes electricity.
Wind Turbine Types

Modern wind turbines fall into two basic groups; the horizontal-axis variety, like the traditional farm windmills used for pumping water, and the vertical-axis design, like the eggbeater-style Darrieus model, named after its French inventor. Most large modern wind turbines are horizontal-axis turbines.
Turbine Components

Horizontal turbine components include:

* blade or rotor, which converts the energy in the wind to rotational shaft energy;
* a drive train, usually including a gearbox and a generator;
* a tower that supports the rotor and drive train; and
* other equipment, including controls, electrical cables, ground support equipment, and interconnection equipment.


SOURCE : http://windeis.anl.gov

Pertamina Plumpang Kebakaran

Musibah kembali terjadi di Indonesia.Tepatnya tanggal 19 jan 2009 pertamina plumpang yang memasok bbm se-jabodetabek kebakaran. Kebakaran ini terjadi pada tangki n0 24. Pada waktu kebakaran tangki no 24 ini tidak terisi penuh akan tetapi bahan bakar (bensin jenis premium)yang berada dalam tangki habis terbakar, hal ini dikarenakan susahnya api yang dipadamkan. Penyebab kebakaran ini belum ditemukan. Akibat dari kebakaran ini adalah selain kerugian yang diderita pertamina, juga menimbulkan kepanikan warga sekitar dan warga se-jabodetabek yang khawatir akan kelangkaan bbm....di Yogya langka ga ya bbm??...(sumber gambar :www.kompas.com)

WALLPAPER NARUTO

Akatsuki

The Akatsuki kanji means daybreak, breaking down the word itself gives us "aka" meaning red (a common color in the group) and "tsuki" meaning moon. This Organization is a collection of S-Ranked criminals. Many of these are missing-nins who fled their villages after causing death and destruction. With the departure of Orochimaru, the deaths of Sasori, Kakuzu, Deidara and the neutralization of Hidan, there are 6 active Akatsuki members. The group replaced Sasori with "raw" recruit Tobi, who was eager to do his part. Most members wear a forehead protector from their hidden village with a scratch through it, and all seem to wear a ring identifying their position in the organization and a black cloak with red clouds. When the organization members leave to travel the country they will work in groups of two collecting knowledge of new skills and jutsu.

Their ultimate goal is to control the world; this will be accomplished through three steps. Step One is for the group to attain money. Step Two is to create the first mercenary group. Shinobi villages make money for their country, and for the money to be steady it requires war. Because there have not been any large scale wars in approximately the last decade, the ninja villages were being reduced in size. The Five Great Shinobi Villages could handle the downtrend, but the smaller villages could not. Akatsuki will form their own fighting force with no country allegiance. With this force they will undercut all the other villages and fight their battles for cheap. Then using the bijuu they can create new battles and new wars and gain a monopoly over the whole market. In the end they plan to control all the wars and be powerful enough to even collapse the shinobi villages of the large countries, forcing them to rely on Akatsuki as well. With all that in hand, the group can achieve Step Three, to control the world. It should be noted their goal and plans have been explained by Pain, the man acting as leader. While Pain was separated from the group, he expressed his own desire for the Bijuu, to use them to create a powerful Kinjutsu. It has also recently been revealed that Pain reported to Tobi, who was revealed to be Uchiha Madara. What Madara wants with the Bijuu and powerful Sharingan of Uchiha Sasuke is unknown. He may share Pain's deadly Kinjutsu plan or have his own goal mind.

The stated goal of the group is far reaching and it requires the capturing of the bijuu and "Jinchuuriki," meaning the power of human sacrifice. These are the individuals possessing bijuu (tailed beasts) within their bodies. The demons are known by the number of tails their body possesses. Shukaku is the One-Tailed Tanuki, Nibi is the Two-Tailed Cat, Sanbi is the Three-Tailed Turtle, Yonbi is a Four-Tailed demon, Hachibi is an Eight-Tailed Demon and Kyuubi is the Nine-Tailed Fox. The only known Jinchuuriki are Uzumaki Naruto, Gaara of the Sand, Nii Yugito and two other unnamed Jinchuuriki have also been seen. Yugito, Gaara and two or possibly three other unknown Jinchuuriki have had their Bijuu removed. All lost their lives save for Gaara, who was later resurrected with a tensei jutsu. At some point after Gaara's capture and before Yugito's, the group managed to capture and seal away another Bijuu. It is unknown if this was a wild bijuu or a Jinchuuriki. The only remaining Bijuu are the Eight-Tails and the Nine-Tails within Naruto. Akatsuki's current base of operation is unknown. Previously they met at a cave in the River Country, which was later destroyed. They then moved on to a new base. These bases are used to summon the gigantic King of Hell statue. With the reduction in members, the largest gathering of members has happened at Pain's compound in the Rain Country.

DIGESTER BIOGAS

Digester biogas adalah suatu wadah tempat berlangsungnya suatu proses fermentasi anaerob, diantara beberapa model digester biogas yang ada, ada dua jenis digester biogas yang dikembangkan di Indonesia yaitu model india (floating cover) dan model cina (fixed dome).

a. Model Digester India (Floating Cover)

Model India atau lebih sering dikenal sebagai digester mengapung terdiri dari dua bagian, yaitu bak bagian bawah (terbuat dari batu bata) sebagai tempat bahan baku untuk biogas, sedangkan bagian atas berbentuk sungkup terbuat dari pelat baja sebagai penampung biogas yang dihasil kan.
b. Model Digester China (Fixed Dome)

Digester model China atau lebih dikenal dengan sebutan digester permanen berbentuk tipe kubah dan seluruhnya terbuat dari batu bara dan ditanam dalam tanah. Kelemahan dari model digester ini yaitu pengurasan kerak lebih sulit dilakukan.

PHOTOVOLTAIC

Teknologi photovoltaic merupakan teknologi yang memanfaatkan energy sinar matahari yang diserap oleh material semiconductor, sehingga electron bebas dan hole bebas tereksitasi. Tereksitasinya electron bebas ini akan menghasilkan arus.

HISTORY of PHOTOVOLTAIC

The development of photovoltaic cells can be dated originally to Becquerel’s discovery in 1839 of aphotovoltage produced by the action of light on an electrode in an electrolyte solution. About 40 years later, Adams and Days observed the photovoltaic effect in selenium (Adam and Days, 1877). Solar efficiency of about one percent characterized selenium and copper oxide cells by about 1914. The modern era of semiconductor photovoltaic started in 1954 when Chapin, Fuller and Pearson obtained a solar efficiency of six percent for silicon junction (Chapin et al., 1954), a value that was increased to 14 percent by 1958, and to 28 percent by 1988 (Verllinden et el., 1988). (Tulisan kutip dari buku photovoltaic materials)

Ramai-ramai nimbun BBM yu.........

Oknum : Hai prends elo setuju kaga bensin naek?
Prend oknum : Ya enggak lah!ne naek bensin harga sembakao juga naek
Oknum : Bukan itu aja prend....kita juga susah nyari bensinnya coz sekrg banyak orang-
orang nimbun BBM...........prend ane ada ide neh.......?
Prend oknum : Ide apaan tuh?
Oknum : yuk nimbun BBM juga.....
Prend Oknum: Gile loe........!!!!!!!!!!NTUh ide bener-bener gile.....gue ga mw ikut-ikut
Oknum :Ya elah, cupu banget sih loe...kalo kita nimbun bbm dapet duit banyak men bukn tu aja kita juga ga usah ikut-ikutan ngantri kalo deadline harga bnsn naek
Piye prend?
prend oknum:ogah ah...bisa-bisa gw masuk bui