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Archive for August 28th, 2009

Water Efficiency – Water Used in Generating US Electricity

In my four-article series on water use (The Resource Matrix), I took you on a journey to reveal the layers of The Resource Matrix in order to help you understand how water will be a highly contested commodity tomorrow, possibly as much as oil is fought over today.

You learned about your water footprint and a website where you can calculate it, virtual water and virtual water transfers, whereby choices here affect water availability elsewhere, to the point of some people not having enough water to drink in order to produce inexpensive dyed cotton, along with insane choices such as growing crops in the desert.

You learned that on average it takes 1854 to 3000 gallons to produce one pound of beef.

Yep, it’s it’s been a great journey through the sidetrip city of the Resource Matrix.

Today, we’ve found the on-ramp to the Green Lighting Interstate and are driving to take a look at water use in generating electricity.

For a simple reason. It takes a lot of water to produce electricity.

How much? 5% of all US water? 10%? Can’t be as high as 25%?

Electricity and water?

I thought the issue was fossil fuels and greenhouse gases

The U.S. Geological Survey (USGS) estimated water use in the United States in 2000.

Their grand total: 408 billion gallons per day withdrawn for all uses.

The number 1 spot, weighing in at 48%, was thermoelectric power.

Irrigation earned the runner-up prize at 34%.

The 195 billion gallons need to come from somewhere, and actions have consequences. Environmental ones, as in 40 million fish in the Great Lakes killed each year due to being trapped against water intake devices. That’s a lot of Friday night fish dinners.

How much water is used in generating electricity?

Large fossil fuel and nuclear plants require incredible quantities of water for cooling and ongoing maintenance.

Water for thermoelectric power is used in generating electricity with steam-driven turbine generators. It uses 48% of all water in the US.

According to the Pace Energy and Climate Center, the amount of water used for power plant cooling varies by each specific power plant’s electricity generating technology and size. Nuclear reactors require the most water for cooling, and baseload fossil fuel power plants come in second.

The Salem Nuclear Generating Station alone takes 3 billion gallons a day from the Delaware Bay, according to the Pace Energy and Climate Center.

Nationally:

• Steam electric generating plants across the nation draw in more than 200 billion gallons per day.
• Nuclear and fossil fuel power plants drink over 185 billion gallons of water per day.
• Geothermal power plants add another 2 billion or so gallons a day.
• Most renewable energy technologies require little or no water for cooling.

These numbers are starting to sound like the same ones the U.S. Treasury and Federal Reserve Bank use.

Imagine watching your favorite science program where astronomers explain that the universe is 78 billion light-years wide (78 billion units of 5,878,630,000,000 miles). There is absolutely nothing in our experience to help us wrap our mind around it.

How much is 3 billion gallons per day?

The Delaware Bay feeds Salem Nuclear Generating Station 3 billion gallons a day.

Imagine this rectangle: a football field with end zones (360 feet long x 160 feet wide). Then add to it walls on each side of the rectangle to create a container to hold the 3 billion gallons you pour into it.

How high do you need to make those walls to contain 3 billion gallons? 6915 feet high. Or 1.3 miles.

Maybe 6915 feet high is still hard to imagine. So how deep do you cover the field in order to feed the Salem plant every minute? Answer: 5 feet deep. Every minute.

48% of all water use: We’re Number One!

How much is 195 billion gallons per day?

Using the USGS figure for 2000, thermoelectric power nationwide used 195 billion gallons a day, or 48% of all water used in the US. My guess is the water use has grown since then.

How high are the walls on our football field now? 449,475 feet or 85 miles high. We’re back to US Treasury and astronomy numbers again.

So, let’s get a higher-level view to help us.

Lake Erie holds 116 cubic miles of water.

Nationally, thermoelectric power uses 195 billion gallons a day – or 64.2 cubic miles a year.

We drain Lake Erie every 22 months.

But the water used is returned to its source.

So what’s the issue about water use?

Power generation returns 98% of the water back to its source (bay, lake, river, ocean).

It’s the environmental consequences.

The Pace Energy and Climate Center explains it neatly:

Withdrawal of large volumes of surface water for either power plant cooling or hydropower generation can kill fish, larvae and other organisms trapped against intake structures (impinged), or swept up (entrained) in the flow through the different sections of a power plant.

Examples include:

• The Salem Nuclear Generating Station is responsible for an annual 11 percent reduction in weakfish and 31 percent reduction in bay anchovy.
• At the Indian Point 2 and 3 reactors on the Hudson River, the number of fish impinged totaled over 1.5 million fish in 1987.
• The 90 power plants using once-through-cooling on the Great Lakes kill in excess of 40 million fish per year due to impingement. (Once-through cooling needs a continual flow of new water, and uses 30 to 50 times that of a closed cycle system. Closed cycles cool down water from steam then reuse it.)

The diversion of water out of the river removes water for healthy in-stream ecosystems:

• Stretches below dams are often completely de-watered.
• Fluctuations in water flow from peaking operations create a “tidal effect,” disrupting the downstream riparian community that supports its unique ecosystem.
• A dam’s impoundment slows water flows, which hinders natural downstream migration of many fish species.
• By slowing river flows, dams also allow silt to collect on river and reservoir bottoms and bury fish spawning habitat. Silt trapped above dams accumulates heavy metals and other pollutants. Disrupting the natural flow of sediments in rivers also leads to erosion of riverbeds downstream of the dam and increases risks of floods.
• The impoundment of water by hydropower facilities fundamentally reshapes the physical habitat from a riverine to an artificial pond community.
• This often eliminates native populations of fish and other wildlife.
• Dams also impede the upstream and downstream movement of fish and other wildlife, and prevent the flow of plants and nutrients. This impact is most significant on migratory fish, which are born in the river and must migrate downstream early in life to the ocean and then migrate upstream again to lay their eggs (or “spawn”).
• As mentioned above, withdrawal of water into turbines can also impinge or entrain significant numbers of fish.

The cleanest kilowatt is the one never used:

Back to those compact fluorescent lamps and LEDs

PowerScorecard.org explains the solution:

By re-directing electricity dollars to support environmentally benign energy resources, consumers are empowered, in states that offer supply choice, to influence the existing generating resources that are deployed to meet demand.

They can also support the construction of new and cleaner electricity resources that will be built to meet overall growth in demand in the future. By supporting these power options, consumers can minimize many water use and consumption impacts. Still, directing your dollars to cleaner power products in no way helps remediate damages that already have occurred. Consumers can stop the construction of new hydropower facilities or alter conditions of siting and operation, but they cannot undo previous environmental degradation that occurred at existing hydropower facilities.

In short, reduce your use of electricity.

More Info:

We used several sources for this article, including the PowerScorecard.org website, which is produced by the Pace Energy and Climate Center, which is part of the Pace University School of Law’s Center for Environmental Legal Studies, Pace University, White Plains, New York.

On PowerScorecard, you can get:

• Ratings of Electric Power Choices for some service areas.
• More info on electricity and the environment:
  • Technologies
  • Climate change
  • Acid rain
  • Ozone depletion
  • Water use (our article today)
  • Water quality
  • Land: on-site and off-site impacts

Thanks for letting us keep you updated . . .

To your green, brighter future,

Cinnamon Alvarez,

A19

And now I would like to offer you free access to powerful info on energy efficiency that’s easy to read and cuts through all this “green” information clutter — so you can literally start making positive changes today.

You can access it now by going to: http://www.a19.com/pub/articles/

From Cinnamon Alvarez: Founder, A19 — woman-owned green manufacturer of hand-made ceramic lighting fixtures

The Story of Eco Radio

The Perfect Solar Storm: A Global Disaster

The average solar cycle lasts for eleven years. The cycle includes a minimum of solar activity and a maximum. The sun is unusually quiet right now and has been for some time but there should be an increase in solar activity at some point in the near future.

The best current scientific estimate for the next solar maximum is 2012. If this estimate is correct, there is still a few years to try and prevent the potential of a future global disaster. A disaster that would begin on the surface of the sun and could end with tragedy on earth.

The surface of the sun is a mass of plasma that contains highly charged energy particles. Once in a while, some of these particles escape the suns surface and a mass of plasma travels through space on the solar wind. This process is known in scientific terms as a coronal mass ejection but it can also be called a solar storm.

A disaster for the planet would occur if a solar storm reaches and hits the earths magnetic shield in just the right way. If it were to happen, millions of people would lose their lives and the planet would be thrown into chaos as the technology that has become crucial to every day living suddenly gets taken away.

The perfect solar storm will start with skies that will be filled with a bright red aurora. However, soon everything will become dark as every electric bulb becomes devoid of light. The storms damage to the electric grid would be caused through an increased DC current. The runaway current would knock out and melt hundreds of key transformers within minutes, cutting off power for hundreds of millions of people.

Those damaged transformers cannot be repaired only replaced and installing a replacement takes a well-trained crew a week or more. Its incredible to consider that most major electrical utilities have just one or two suitably trained crews available for these type of transformer repairs. In addition, there are only a few spare transformers available and the rest would have to be built to order. Its a process that can take nearly twelve months.

So, the power blackout from the perfect solar storm would last for months but its not just the absence of light that would be the problem. Drinking water would still come through the taps for maybe half a day after the storm. With no electricity to pump water from reservoirs, there would be no more tap water after that.

The electric grid is necessary for almost all natural gas and fuel pipelines to operate. As a result, fuel and natural gas will quickly run out and without food delivery, supermarket shelves would soon become bare. Soon it would become necessary to control public hysteria and the military would have to be called in to restore civil order

There will be no power for heat, cooling or refrigeration until the grid is repaired and after their back up generators run out, hospitals will not be able to provide modern healthcare. A lack of water and food will result in spreading disease but Pharmaceutical companies without electricity will not be able to produce the necessary medicine.

Of course, many will say that this is absurd science fiction and it cannot happen here, but this chilling disaster scenario was outlined in a report released last January (funded by NASA) by the US National Academy of Sciences (NAS).

The fact is that a storm from the sun did hit the earths magnetic field in 1859. The effect of this solar storm on earth became known as the Carrington Event. The event was named after the amateur astronomer who observed two patches of intensely bright and white light emanating from a large group of sunspots that may have produced the event.

The solar storm that produced the Carrington Event created a red aurora across the planet from the poles to the tropics. Throughout the world, telegraph systems crashed, machines burst into flames, and electric shocks rendered operators unconscious. Compasses and other sensitive instruments reeled as if struck by a massive magnetic fist. It can happen again and the technology of the planet is now much more advanced and vulnerable.

The next solar maximum is estimated to return in about three years. A global disaster from the perfect solar storm can be prevented with proper contingency planning. There is still time for the government to be proactive and prepare to avoid disaster by creating a potential response to quickly repair the damage to the electric grid from the perfect solar storm.

James William Smith has worked in Senior management positions for some of the largest Financial Services firms in the United States for the last twenty five years. He has also provided business consulting support for insurance organizations and start up businesses. He has always been interested in writing and listening to different viewpoints on interesting topics. Visit his website at http://www.eworldvu.com or his daily blog at http://www.eworldvublog.blogspot.com

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