Category Archives: Electrical & Electronics Engineering
The invention that changed the history of light in the world
Chances are you, like many others in the world, sometime in your life with a bulb has burned trying to change it. Though perhaps not realizing the change is, this uncomfortable situation is increasingly rare. On 9 October 1962, the American scientist Nick Holonyak not only gave a solution to the incandescent bulb has burned the fingers of millions of people in the course of its history.
Also, and perhaps more importantly, Holonyak pioneered a device that revolutionized lighting technology and eventually made the incandescent lamps they became obsolete. An LED (stands for Light Emitting Diode) is a two-terminal electronic component that allows the flow of electrical current through it without the intermediation of a gas, as in traditional bulbs. Holonyak developed LEDs that emit a red light of low intensity. Today, however, there are devices with the same technology that emit high brightness light of any color.
At first, the LED bulbs invaded the Christmas decoration industry. However, with the development of multi-color LED, now are the light source of television, stadiums and casinos. This is a revolutionary development, because it has allowed generating light at lower cost and longer than traditional lighting with infrared radiation. The bulbs do not take minutes to ignite, do not heat up and melt rarely.
How to save energy in our homes?
Increases in the price of electricity has made energy efficiency will become increasingly important. Here are a few tips for the accounts of the light does not impact so much in their pockets. The first time I paid real attention to the term energy efficiency was in 2008, when Chile was on the verge of a crisis of power due to the lack of rain, the reduction in Argentine gas supplies, the fall of two central and record oil prices, a combination of factors, some experts called as a perfect storm.
As a solution to this complicated scenario, the government decided to conduct an energy efficiency campaign to reduce the power consumption of the population, and in passing awareness of the importance of properly use energy. The result: We ended the year with a decline of 8% in energy consumption, avoiding the dreaded rationing and learned an important lesson: we must take care of energy.
But what do we mean when we talk about energy efficiency? It means that we must do more things using the same amount of energy. To instill this in the public, the Government established the Energy Efficiency Programmed Country a couple of years later became the Chilean Energy Efficiency Agency. Given the current scenario I decided to find some tips to help us lower our bills a little light and in turn encourage us to be a little more conscious about the use of electricity. Then the data that I found most interesting.
China last the largest hydroelectric facility in the world
The thirty-second installation of the turbine, 700 MW, increasing the total capacity up to 22.5 hydroelectric gigawatts, an amount representing 11 percent of China’s total hydroelectric capacity.
The largest hydroelectric facility in the world, located in the Three Gorges Dam in Hubei province, China, started on Wednesday to full operation after successfully connecting to the last turbine, has announced the general manager Company China Yangtze Power, Zhang Cheng. The thirty-second installation of the turbine, 700 MW, increasing the total capacity up to 22.5 hydroelectric gigwatts, an amount representing 11 percent of China’s total hydroelectric capacity.
“The entry into operation of all generators makes the Three Gorges Dam is the largest hydropower project in the world and the largest producer of clean energy,” he said during a ceremony Zhang was quoted by China Radio International. The dam construction began in 1994 and its first power generating unit was connected to the network in 2003. The official news agency Xinhua reported that the plant has already generated a total of 564,800 million kilowatt hours, which China has saved about 200 million tons of coal a year.
But the dam, located in the middle reaches of Yangtze River, has a total cost of 254,000 million yuan (32,000 million), four times the cost estimated, and have spent another 123,800 million yuan (15,500 million euros) in “follow-up work.” Construction, with a dam 185 meters high and a reservoir 600 kilometers long, has forced the Chinese authorities to relocate at least 1.3 million people. The Government has acknowledged that he has increased the risk of earthquakes or landslides in the region.