![]() ![]() The power can be transmitted using microwaves, millimeter waves or lasers. Wireless power transmission (WPT) can be used for applications where either an instantaneous amount or a continuous delivery of energy is needed, but where conventional wires are unaffordable, inconvenient, expensive, hazardous, unwanted or impossible. ![]() Rural areas such as those in China require the electrical power necessary to bring them into the 20th Century and to equal standing with Western nations. Africa is in need of power to run pumps to tap into the vast resources of water under the Sahara Desert. Yet there is no method for delivering power. There are areas of the World where the need for electrical power exists. This loss implies that our present system of electrical distribution is only 70-74% efficient. The resistance of the wire used in the electrical grid distribution system causes a loss of 26-30% of the energy generated. ![]() Much of this power is wasted during transmission from power plant generators to the consumer. Electrical power accounts for much of the energy consumed. A great concern has been voiced in recent years over the extensive use of energy, the limited supply of resources, and the pollution of the environment from the use of present energy conversion systems. Still, generally, wireless energy transfer works very well at short range and efficient long-distance transfer is possible if the transmitters and receivers are physically large, or if the energy can be formed into a tight beam. Sending energy through wires is often more efficient because wires represent a low loss way to confine and guide the energy to where it is needed. The efficiency of an energy transferring system is the percentage of energy sent which reaches the destination. ![]()
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