Explain any two energy conservation techniques in fan.

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Following are energy conservation techniques in Fans : 1) Use the electronic regulators instead of conventional regulator: Function of regulator is to control the speed of the fan. The conventional regulators use a resistance having taps and connected in series with the fan. Considerable amount of energy is lost in form of heat in the resistance. When the fan is operating at low speed the power loss is significant. The electronic fan regulator uses TRIAC, a semiconductor device. In electronic regulators voltage is varied by varying the firing angle. Since the voltage supplied is proportional to the speed and hence the speed of the fan can be increased or decreased. An average saving of 27% can be achieved under reduced speed, if the fan is used along with an electronic type regulator against a conventional type regulator. Though the initial cost of an electronic regulator is high, the higher savings will pay back the investor in less than 10 months. 2) Use of energy efficient fans (motor): Energy efficient motor can be used in fans for reducing energy consumption. 3) Use of windows to allow Natural air circulation: Keep open your windows to allow natural air circulation. This will enable you to reduce the fan usage or to operate the fan at reduced speed, to reduce your energy consumption energy bill. 4) Make sure to turn your fan OFF when you leave the home, office or industry: Switch OFF fans whenever not required or you are leaving your home, class room, office or industry. 5) Use of properly designed blades: Whole house fans are large, powerful fans usually 20-48 inches in diameter with a one-quarter to one-half horsepower motor. 6) Timely and proper maintenance of fans: Don't forget to properly maintain your electric fan and keep it in good working order. 


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