Sometimes, we can use electricity independently of the electric power grid. We can use generators for the generation of electricity which ensure that most of the essential appliances can be run whenever there is a power outage. There are generators of different wattage capacities and they can be used according to the needs of the individual. The choice of purchasing the right type of the generator depends of different factors like the voltage ratings, wattage capacity, fuel type, fuel efficiency, portability, price, noise level – a really good choice can only be made if you know what to look for.
–Standby generators provide backup power in homes and offices. These generators are permanently installed outside the house or office building, and plugged into the electric circuits or home wiring. They can automatically recognize any disruption in the usual electric supply and then they begin supplying power within a few moments. Standby generators use propane and natural gas, which offer a safe, lasting fuel supply. It is also more environmental friendly than gasoline or diesel fuels. Like any other motor, a generator motor creates heat and needs to be cooled to prevent overheating. These standby generators can be either air-cooled or liquid-cooled and the major difference is that air-cooled systems are louder and not quite as effective. Liquid cooled systems are more expensive but quieter and more dependable.
–Portable generators are commonly used in areas where there is no power supply such as construction sites, camps, etc. Portable generators are able to run appliances such as refrigerators, televisions, furnaces.. Portable generator systems are wheeled units that have to be rolled outside to start. Through extension cords, portable generators supply electricity to selected appliances. These type of generators use gasoline, that can be difficult to store and transport, and additionally, carbon monoxide is always a big concern. Portable generators tend to be much smaller and less expensive, however, they are designed to be used just for short periods of time (only a few hours).
However, there is a very interesting innovation, a small generator- rubber chip that converts kinetic energy caused by human body’s simple movements such as walking or breathing into electricity. This energy is sufficient to power cell phones, mp3, mp4 payer as well as other smaller portable devices such as pacemakers and hearing aids. This revolutionary chip is made of PZT inserted into a transparent silicone cover of width of one millimeter. Energy is created when it is pressed or bent. The scientists who designed the chip claim that inserted into shoes it could create energy by walking or jogging and after conversion into electricity, could be used to power small portable devices such as mobile phones and MP3 players. Hand movements while typing on the computer also could be used.
The rubber chip could be also used for medical purposes. In fact, scientists have a vision of using the chip as a means to power a pacemaker, so it would be installed next to the lungs. In this way, the chip could use the energy of motion caused by breathing. Most importantly, users of a pacemaker should not have to undergo operations every time the battery has to be changed. The application of this rubber chip to power hearing aids is also not excluded.
Scientists who created the rubber chip believe that the human body is a perfect source of energy, but it is not only where it might be applied. The chip can also get in a car or bicycle tires.