How to calculate how much will be the electricity bills for your operating electric heater?

E lectricity bill have to be paid for the energy you have utilized in the form of electricity. Electricity company bill you for your energy consumption in kwh. A kwh energy is said to be consumed, if a 1kw consuming device or appratus is stayed turned ON for one hour. This is the simplest definition you can find at various other website too. But there is a something you have to bother about. The electricity bill, for instance a 1HP(745W) motor, can be higher than what the device is consuming. The reason is that often devices or apparatus, like motor, have capacitance and inductance associated with them. Because of these, inductance and capacitance, the power factor is less than one. which results in extra loads to the transmission system and hence, electricity company charges for these unnecessary load. Don't worry if you so not understand power factor at this point of time.In very simple form, remember, the more the power factor, lower will be the reactive power consumtion(A power

How to prolong Your Electric Heater Life.

How to Question
    Electric Heater works under high temperature. Normally an Electric Heater would fail, when its heating wire melt down. So to get your heater deliver its intended job done for an appreciated long time, some precautions should be taken. The very important thing to be taken into consideration is the heater sheath watt density. A sheath watt density can be defined as the total rated power divided by its exposed surface area from which heat is to dissipated. It Should be noted that for a given size Heater (for instance a Tubular Electric Heating Element), the watt density depends upon the medium to be heated and its surrounding environment. For Example a heater designed to heat water can not be used in open air, if, when used, will burn sooner it reach its failure temperature. Other Precaution Required to be taken is to check with the connection. Since an electric heater works in a high temperature environment, the heater terminal are usually equipped with post terminals (screws and nuts). If the connection wire is not tightened properly or loosely  held, it would then result in arching at the terminal. This arching have two effects:
1. Because of arching the voltage surge can be around thousands volts which is enough to create a breakdown for heater insulating material.
2. Terminal will Burn Resulting in an open ended circuit.

The Above discussion is valid to a single phase and a three phase connected heater. But for a three phase connected heater, especially for a star connected heater, it have been seen that if the heater connected are not balanced, then it can, again be a cause of heater failure. For that reasons it is suggested by heater manufacturer not to mix old heater with a new one.

Conclusion: It is to be noted that, for an electric heater, proper watt density should be selected rather than total wattage depending upon the operating environment. Also check with the proper connection and the fashion (star or delta) in which these heater are to be used with. By ensuring these little things you can expect a long heater life and with desired results.


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