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Archive for July, 2010

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Buyer Beware – Using Power Factor Correction and Transient Voltage Surge Suppression to Reduce Energy Costs.

Today’s energy conscious climate has motivated many to do what they can to become more efficient and conserve energy and money. Unfortunately this same climate has prompted others to take advantage of unsuspecting consumers’ wishes to save energy and reduce expenses.

Companies that tout power factor improvement (kVAR correction) and transient voltage suppression are a good example of this bad trend. Lately we are seeing more and more of these companies cropping up and feel it is time to set the record straight.

First, transient voltage surge suppression (TVSS) plays a valuable role in improving power quality to protect sensitive equipment inside a facility. However, TVSS does not save energy. TVSS’s are only active a tiny fraction of a second to protect against voltage surges which only last for less than a millisecond. To actually reduce energy consumption the TVSS would need to actually cut power consumption for an extended period of time which is not what they are designed to do. Again, TVSS is important to protect sensitive electrical equipment but buyers should avoid vendors promising, or even guaranteeing, that they will reduce energy consumption.

Now what about vendors who claim that improving power factor will save 15% or 20% or 30% of energy consumption and corresponding cost? This one is a little trickier.

For residential applications, power factor does nothing to save energy because the typical home already has an average power factor of about 0.97 which is almost the perfect power factor of 1 or unity. In addition, the device (called a capacitor) is placed at the main circuit breaker. According to IEEE 5.5.3.3 capacitors must be situated at or near the respective inductive loads to reduce power system losses by reducing heat and distribution losses known as I2R losses.

So what about commercial and industrial facilities using power factor correction to reduce energy costs? It is perfectly appropriate for a company that is incurring penalties or a kVA billing structure from the utility company to improve the facility’s overall power factor by employing a capacitor bank at the main service entrance or individual capacitors at or near the respective motor loads. Doing so will eliminate the power factor penalties and/or reduce the kVA demand charges on the utility bill which can save significant money and provide a significant ROI on the investment.

But what about power factor correction reducing kWh consumption? IEEE also tells us that I2R losses only account for 2 to 5% of the total load in a facility. Simple math tells us that it would be against the laws of physics to get the 15% to 30% energy reduction claimed by some vendors. Think about it. Even if your facility had 5% distribution losses and you could correct 100% of the problem via power factor correction at every load (which can’t be done) you would still only save 5% at the most. No where near the claims of some capacitor vendors and manufacturers.

All that said, power factor correction when done properly will eliminate utility penalties and kVA demand charges, improve facility power quality, increase electrical system capacity, and save a little energy when applied to the appropriate motor loads.

So make an investment in transient voltage surge suppression and power factor correction when appropriate and necessary. But caveat emptor!

LEED Certified and Green Technology, Energy Edge Technologies can help save your Industrial, Hospital, Grocery Store or any other high energy commercial buildings massive amounts of money! We Take A Full Facility Approach or call 888-729-5722 Ext. 100.

A day after failing to make weight for his fight against Matt Hughes, Thiago Alves dominated the former UFC welterweight champion en route to a 2nd round TKO victory. The main event at UFC 85 in London was somewhat anticlimactic to the fans at the O2 Arena who considered the semifinal matchup between Manchester’s Michael Bisping and Jason Day the biggest fight on the card.

Hughes didn’t make any excuses following his one sided loss, saying simply that hes a good fighter and he got me. The longtime king of the UFCs welterweight division also gave notice that his career as an active fighter was drawing to a close, suggesting that he had one fight left and challenging Matt Serra in what presumably would be his retirement match. Hughes had no answer for Alves from the opening horn, as he was stuffed on several takedown attempts early on. When he did finally get his opponent to the ground he was unable to do much damage. Alves, conversely, scored effectively with his striking including several damaging knee strikes. He also did considerable work on the ground, with an elbow strike opening up a large cut on Hughes forehead. Though he didnt get to his knees a la Georges St. Pierre, Alves did make a plea to Dana White for a title shot. His failure to make weight wont help his cause, however, and judging from the UFC Presidents incredulous smirk in response that opportunity wont be immediately forthcoming.

The end came early in the 2nd round as Hughes was caught coming in by a devastating knee strike. He fell to the canvas in a heap and referee Herb Dean was jumping in to stop the contest before Alves could follow up with any punches.

Michael Bisping simply overwhelmed Jason Day en route to a lopsided TKO victory. Bisping built upon the improved boxing skills he demonstrated at UFC 83 by unveiling an impressive ground and pound attack. Day never really got anything going and by the last minute of the fight was simply trying to cover up to prevent damage from Bispings elbows and hammer fists.

In other action, Mike Swick used an array of high kicks and a 7 reach advantage to coast to a unanimous decision over Marcus Davis. Davis, a former professional boxer, was unable to get inside against his lanky opponent and was never really in the fight. Like Bisping, Swick may have made an excellent career choice by moving down in weight.

A controversial point deduction for a strike to the back of the head cost Nate Marquardt his match against Thales Leites. Marquardt was solidly in charge for the entire fight, but suffered a point deduction for an illegal knee strike in round one. While that infraction was valid, replays of the 2nd round deduction for the strike to the back of the head gave the impression that he was penalized for a legal strike to the side of the head.

In the opening PPV match, another controversial ending saw Fabrico Werdum defeat Brandon Vera by 1st round KO. The fight had been evenly contested up until the stoppage, with Werdum scoring a couple of takedown and Vera countering with some effective punching. Late in the first round, Werdum got a full mount and began to fire a series of punches. Vera was clearly defending himself and didnt appear to be hurt at all when the referee jumped in to stop the fight. Vera said that hed answered that he was OK when asked by ref Dan Miragliotta and that he was just trying to ride out the round from that position.

Ross Everett is a widely published widely published freelance sports writer and highly respected authority on sports betting odds comparison. He writing has appeared on a variety of sports sites including sports news and sportsbook directory sites. He lives in Las Vegas with three Jack Russell Terriers and a kangaroo. He is currently working on an autobiography of former energy secretary Donald Hodell.