Green Energy Power
Buyer Beware – Using Power Factor Correction and Transient Voltage Surge Suppression to Reduce Energy Costs.
Today’s energy acutely aware climate has motivated many to do what they will to change into more efficient and conserve energy and money. Unfortunately this same climate has prompted others to make the most of unsuspecting consumers’ wishes to save lots of energy and cut back expenses.
Companies that tout power factor improvement (kVAR correction) and transient voltage suppression are a very good example of this dangerous trend. Lately we are seeing increasingly of these companies cropping up and feel it is time to set the record straight.
First, transient voltage surge suppression (TVSS) plays a useful role in improving power quality to protect sensitive tools inside a facility. However, TVSS doesn’t save energy. TVSS’s are only active a tiny fraction of a second to protect against voltage surges which solely last for less than a millisecond. To actually scale back energy consumption the TVSS would want to truly cut power consumption for an extended time frame which just isn’t what they’re designed to do. Again, TVSS is vital to defend sensitive electrical equipment however buyers ought to avoid vendors promising, or even guaranteeing, that they may reduce vitality consumption.
Now what about distributors who declare that bettering power issue will save 15% or 20% or 30% of power consumption and corresponding cost? This one is somewhat trickier.
For residential applications, power issue does nothing to avoid wasting energy because the standard home already has a median power issue of about 0.97 which is almost the proper power issue of 1 or unity. In addition, the system (called a capacitor) is placed at the main circuit breaker. According to IEEE 5.5.3.3 capacitors have to be situated at or near the respective inductive loads to scale back power system losses by reducing heat and distribution losses often known as I2R losses.
So what about industrial and industrial facilities using power factor correction to scale back energy costs? It is completely appropriate for a corporation that is incurring penalties or a kVA billing construction from the utility company to improve the facility’s total power issue by employing a capacitor bank on the main service entrance or individual capacitors at or close to the respective motor loads. Doing so will eliminate the facility factor penalties and/or reduce the kVA demand costs on the utility bill which may save vital money and provide a significant ROI on the investment.
But what about power factor correction reducing kWh consumption? IEEE additionally tells us that I2R losses only account for 2 to 5% of the overall load in a facility. Simple math tells us that it could be against the legal guidelines of physics to get the 15% to 30% vitality reduction claimed by some vendors. Think about it. Even in case your facility had 5% distribution losses and you would correct 100% of the issue via power factor correction at every load (which can’t be done) you’ll still only save 5% on the most. No where near the claims of some capacitor vendors and manufacturers.
All that said, power issue correction when done properly will eradicate utility penalties and kVA demand charges, enhance facility energy quality, enhance electrical system capacity, and save just a little energy when applied to the suitable motor loads.
So make an funding in transient voltage surge suppression and power issue correction when appropriate and necessary. But caveat emptor!
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