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Why You Need Power Factor Correction and TVSS Do Not Save Energy

February 8th, 2010 Robert Holdsworth No comments

In today’s energy climate more and more people have become motivated to accomplish what they can to become more energy efficient to conserve energy and money. Regrettably this same climate has encouraged some to take advantage of innocent consumers’ desires to save energy and reduce operating expenses.

Vendors that advertise power factor improvement (kVAR correction) and transient voltage suppression to save energy are a good case in point of this bad trend. Recently we are seeing more and more of these businesses cropping up and we believe it is time to set the record straight.

First off, transient voltage surge suppression (TVSS) plays an important part in improving power quality to guard sensitive equipment inside a facility. However, TVSS does not save energy. TVSS’s are barely active an infinitesimal portion of a second to defend against voltage surges which only last for less than a millisecond. To actually decrease energy use the TVSS would need to essentially cut power consumption for an extended amount of time which is not what they are designed to do. Again, TVSS is essential to protect susceptible electrical equipment but consumers should steer clear of vendors promising, or even guaranteeing, a reduction in energy consumption.

And what about salespeople who maintain that increasing power factor will save 15% or 20% or 30% of energy consumption and resultant costs? This is false but also a bit trickier.

For homes, power factor correction does zero to save energy because the average home already has an average power factor of approximately 0.97 which is nearly the perfect power factor of 1 or unity. Additionally, the unit (called a capacitor) is installed at the homes main circuit breaker. According to IEEE 5.5.3.3 capacitors must be located at or near the individual inductive motor loads to decrease power system losses by reducing heat and distribution losses known as I2R losses.

So what about commercial and industrial facilities looking to use power factor correction to shrink energy expenditures? It is completely appropriate for a business that is incurring penalties or a kVA billing structure from the utility company to improve the facility’s overall power factor by installing a capacitor bank at the main electrical service entrance or individual capacitors at or near the particular motor loads. Doing so will do away with the power factor penalties and/or reduce the kVA demand charges on the electric bill which can save considerable money and provide a significant ROI on the investment.

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

All that said, power factor correction when done appropriately will eliminate utility penalties and kVA demand charges, improve facility power quality, increase electrical system capacity, and save a modicum of energy when applied at the proper motor loads in an industrial facility.

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

Save Money On Your Company’s Energy Bill, visit Energy Edge Technologies site for strategies on saving a tremendous amount of capital on your Corporate Energy Bill or call 888-729-5722 Ext. 100.

Options for Saving by Using Renewable Energy

February 8th, 2010 John Gerace, PhD, PE No comments

There are many different types of renewable energy that can be used in place of energy created by burning fossil fuels. Renewable energy is generated from geothermal heat, sunlight, tides, rain and wind. All of which will naturally replenish. Currently only about 20% of the worlds energy consumption uses natural energy sources.

One of the cleanest and most efficient types of renewable energy is wind power which is slowly gaining in popularity and usage. Wind power is seen more in Europe though many countries are building off shore wind farms. Only a light breeze is needed to generate power and the energy conversion is one of the most efficient of all renewable sources.

Renewable energy is not only being used in large scale production but many can be scaled down to use for small grid or even residential use. The best example of this would be solar power. Solar power takes the suns light and converts it to electricity using solar cells. Solar can easily supplement current electricity usage and some business and people are finding that they no longer pay an electricity bill after conversion to solar power.

Hydropower has been used for years via construction and operation of dams. Most people are familiar with Hoover Dam which is the largest hydropower station in the world. As water flows from a high spot to a low spot it gives off energy which can be transformed into different types of power such as electrical. You also can use hydropower without dams in rivers and oceans as long as there is a current or tide.

Biofuels are mainly based on bioalcohol or bioethanol. This fuel is produced from fermenting soy or sugar that comes from plants. This pure form can then be used instead of gasoline. Biodiesel is an oil made from animal fat, vegetable oils and recycled grease. Although these fuels when burned produce emissions, they are much cleaner than the traditional petrol.

So now that you know, consider how you can make changes and choices to take advantage of these alternatives.

Save Money On Your Company’s Energy Bill, visit Energy Edge Technologies site for strategies on saving a tremendous amount of capital on your Corporate Energy Bill or call 888-729-5722 Ext. 100.

Energy Efficiency and Your Own Efforts

February 8th, 2010 John Gerace, PhD, PE No comments

There are plenty of things you can do to demonstrate better energy efficiency. Everyone knows the big ones such as recycle and turn off the lights. But there are other small things that can really add up. They may seem odd or like slight inconveniences, but the small magnitude of the inconvenience will completely disappear once it becomes a part of your regular schedule.

The first thing is to unplug all chargers when you are done with them. Many people have their cell phone, camera, or MP3 chargers in the same spot, always ready to go for convenience purposes as we are all always rushing out the door. However, leaving something just simply plugged in can drain electricity and at the same time serves no purpose.

Another thing would be to car pool or take public transportation. These are likewise inconveniences to many people, especially on days when they are running late. However, sticking to a schedule like this may actually make you more punctual and aware of your time. It also can be much cheaper for you. Your car will last longer and your petrol bill will go way down.

You should also start recycling the little bits of plastic you may not even realize can be recycled. For example, many people just throw away the plastic trays from TV dinners. This is hugely impractical, since they can be easily rinsed out and recycled.

Many people throw away lots of little bits of paper like sticky notes, or bits of plastic, like from a candy wrapper. This plastic is merely going to sit in a land fill. Why not put it to good use? These things all add up, so we need to be smart about them. If everyone merely took a step back and looked at what they were really wasting–and knew the life of an object after it was thrown away–people would save so much more in terms of recycling and reusing

Save Money On Your Company’s Energy Bill, visit Energy Edge Technologies site for strategies on saving a tremendous amount of capital on your Corporate Energy Bill or call 888-729-5722 Ext. 100.