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Article: Reduce utility cost by improving power factor: because the cost of electrical energy can be dependent on power factor, judicious selection of the techniques used to control electrical power to industrial process heating applications can result in significant savings.(Power Controls)
- Article from:
- Process Heating
- Article date:
- August 1, 2008
- Author:
CopyrightCOPYRIGHT 2008 BNP Media. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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When SCR controllers are used to control the electrical power, power factor is effectuated. Learn how multiple SCR controllers can be used to improve the power factor and reduce electrical costs.
Power factor is the ratio of real power to apparent power; therefore, power factor is
Watts/Vrms x Irms
If the voltage and current are in phase, as would occur with a resistive load, the power factor is unity because the real power and apparent power are equal. If the voltage and current are not in phase, as would occur with an inductive or capacitive load, no power is created and the power factor would be zero.
Because the utility company ...