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5.21.2010

“Our study develops a mathematical model to describe the designs it adopts and why, which could help direct design of future photoelectric devices.”

Purple is the New Green

by Marie Guma-Diaz, University of Miami
Published: May 17, 2010

Purple bacteria were among the first life forms on Earth. They are single celled microscopic organisms that play a vital role in sustaining the tree of life. This tiny organism lives in aquatic environments like the bottom of lakes and the colorful corals under the sea, using sunlight as their source of energy. Its natural design seems the best structural solution for harvesting solar energy. Neil Johnson, a physicist and head of the inter-disciplinary research group in complexity in the College of Arts and Sciences at the University of Miami, thinks its cellular arrangement could be adapted for use in solar panels and other energy conversion devices to offer a more efficient way to garner energy from the sun.

According to the study, purple bacteria adapt to different light intensities by changing the arrangement of the light harvesting mechanism, but not in the way one would think by intuition.

"These bacteria have been around for billions of years, you would think they are really simple organisms and that everything is understood about them. However, purple bacteria were recently found to adopt different cell designs depending on light intensity," says Johnson. "Our study develops a mathematical model to describe the designs it adopts and why, which could help direct design of future photoelectric devices."

Johnson and his collaborators from the Universidad de los Andes in Colombia share their findings in a study entitled "Light-harvesting in bacteria exploits a critical interplay between transport and trapping dynamics," published in the current edition of Physical Review Letters.

Solar energy arrives at the cell in "drops" of light called photons, which are captured by the light-gathering mechanism of bacteria present within a special structure called the photosynthetic membrane. Inside this membrane, light energy is converted into chemical energy to power all the functions of the cell. The photosynthetic apparatus has two light harvesting complexes. The first captures the photons and funnels them to the second, called the reaction center (RC), where the solar energy is converted to chemical energy. When the light reaches the RCs, they close for the time it takes the energy to be converted.

According to the study, purple bacteria adapt to different light intensities by changing the arrangement of the light harvesting mechanism, but not in the way one would think by intuition.

"One might assume that the more light the cell receives, the more open reaction centers it has," says Johnson. "However, that is not always the case, because with each new generation, purple bacteria create a design that balances the need to maximize the number of photons trapped and converted to chemical energy, and the need to protect the cell from an oversupply of energy that could damage it."

To explain this phenomenon, Johnson uses an analogy comparing it to what happens in a typical supermarket, where the shoppers represent the photons, and the cashiers represent the reaction centers.

"Imagine a really busy day at the supermarket, if the reaction center is busy it's like the cashier is busy, somebody is doing the bagging," Johnson says. "The shopper wonders around to find an open checkout and some of the shoppers may get fed up and leave…The bacteria are like a very responsible supermarket," he says. "They would rather lose some shoppers than have congestion on the way out, but it is still getting enough profit for it to survive."

The study develops the first analytical model that explains this observation and predicts the "critical light intensity," below which the cell enhances the creation of RCs. That is the point of highest efficiency for the cell, because it contains the greatest number and best location of opened RCs, and the least amount of energy loss.

Because these bacteria grow and repair themselves, the researchers hope this discovery can contribute to the work of scientists attempting to coat electronic devices with especially adapted photosynthetic bacteria, whose energy output could become part of the conventional electrical circuit, and guide the development of solar panels that can adapt to different light intensities.

Currently, the researchers are using their mathematical model and the help of supercomputers, to try to find a photosynthetic design even better than the one they found in purple bacteria, although outsmarting nature is proving to be a difficult task.

Marie Guma-Diaz is a science writer for The University of Miami.



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Scott's Contracting, St Louis Renewable Energy
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Oil Production Peak Much Sooner Than Expected

Oil Production Peak Much Sooner Than Expected 

May 14, 2010
by Craig Severance

A storm is quickly approaching, and the world is not ready for it.

The permanent end of the era of cheap oil is coming as soon as next year, according to a raft of official reports that have made their way into energy media over the last few months.  Governments are now beginning to acknowledge the looming crisis. Yet, perhaps because they waited too long to prevent it, leaders are not yet alerting the public.

The entire world economy is built on cheap oil,  A permanent oil production shortage will thus lead to The End of The World (As We Know It).  What will come on the other side of this -- will it be good or bad? 

Public Unaware.  Except for a few stories in financial pages such as London's Financial Times, this earth-shaking news has yet to reach the Mainstream Media.  While "Peak Oil" researchers have long warned of approaching oil shortages, the difference now is these dire warnings are being validated by the highest government and oil company officials.  Yet, no political leader has had the courage to make a major announcement to prepare the public for what lies ahead.

This public blindness is tantamount to the isolationism that gripped the U.S. in the years preceding WWII.  While the highest government leaders did their best to prepare for inevitable war, they were hamstrung by the resistance of a public unable to accept what really lay ahead.  Similar to today, some politicians advanced their own careers by feeding on the public's desire to believe no coming storm could ever reach them.  Yet, the storm came anyway. 

The Limits of Oil.   The looming crisis we now face is often referred to as "Peak Oil" -- a status where global oil production will reach a plateau, then begin its irreversible decline.  

Oil fields follow a production curve where output increases at first, then reaches a plateau or "peak", after which a steep decline occurs.   Because existing oil fields decline, oil companies must continually develop major new finds just to maintain existing production.  If these new projects do not exceed the decline of existing fields, it becomes impossible to maintain oil production, let alone grow oil output to fuel economic growth. 

The problem in recent years is that new oil finds have been smaller, deeper, and in more difficult to reach places.  Cheap oil prices simply won't support the investment needed to develop them, so oil companies have not invested heavily enough to keep up with demand.  Lester Brown of Worldwatch Institute notes that major oil companies, awash in cash, have instead spent billions buying up their own stock, aware their existing reserves will soon increase greatly in value.

Did Global Oil Production Permanently Peak in 2008?  Until 2008, world energy forecasters had always assumed global oil production would keep up with economic growth.  According to classic economic theory, as world economies grew they would demand more oil, and oil companies would respond by investing in more exploration and development.  "Peak Oil" was considered decades away.

Beginning around 2005, however, world oil production began to hit a brick wall, and by 2008 global oil demand actually exceeded supply.  With only a 2% shortfall of supply compared to demand, oil spiked to $147/barrel, and U.S. gasoline prices soared to over $4/gallon.

That same year, the International Energy Agency for the first time published a "bottom-up" oil analysis, evaluating each of the world's major oil fields to see if production actually could continue to increase.

After looking at the oil field data, the IEA revised its forecasts of future oil production downward, yet still took a very optimistic official view, by using rosy projections of as-yet-undiscovered oil fields.

Independent researchers, however, using IEA's same "bottom-up" data, have now stated the IEA was wildly optimistic.  The Global Energy Systems Group has concluded the world actually reached Peak Oil in 2008, and global oil production will now begin to decline.   Investment alone cannot fix the problem as the decline rates of existing fields are accelerating.
Significantly, though IEA's official forecasts remained rosy, IEA's Chief Economist Dr. Fatih Birol began urgently telling anyone who would listen the era of cheap oil is over, and "we have to leave oil before oil leaves us".  If we do not "leave oil" behind us fast enough, economic growth may be choked off as oil prices rise to unaffordable levels. 

From "Tin Hat" Theory to "Crikey!"  In the last few months, there has been a sea change in attitudes about global oil supply among top officials.  The UK government, the U.S. Department of Energy, and the U.S. Joint Forces Command, among others, have begun to acknowledge the seriousness of the situation.

On March 25th, the French publication LeMonde reported on a semi-private U.S. Department of Energy Roundtable held in April 2009, where top U.S. DOE energy analyst Glen Sweetnam presented the graph below summarizing prospects for world liquid fuel production vs. demand:


The chart includes all known sources of supply, including undeveloped projects and "unconventional" sources such as tar sands.  It politely labels the expected gap as "unidentified projects". The gap occurs very soon (beginning in 2011) and is very large -- roughly 10 million barrels/day by 2016.  To put this in perspective, 10 mbd is roughly equivalent to the entire output of Saudi Arabia, and is well over 10% of total world demand. (Recall $147/barrel in 2008 occurred with only a 2% shortfall.) 

DOE still avoids any use of the words "Peak Oil", instead talking of an "undulating plateau" of oil prices & production.  Shortages will lead to higher prices and more investment, spurring more production and lower prices.  However, oil price volatility discourages new investment, so production plateaus.  Richard Heinberg of Post Carbon Institute asks "What's the difference?"  in  "Quacks Like a Duck...".

Whatever you call it, there is now a growing official consensus the world faces serious oil supply shortages beginning in the 2011-2015 time frame and continuing.  Rick Monroe of the staff of Energy Bulletin has provided links to the growing list of official warnings here.  

Peak oil analyst Jeremy Leggett, who participated in a closed-door UK government summit on oil supply March 22, summarized the recent awakening of official realization: "Government has gone from the BP position – ‘40 years of supply left, the price mechanism works, no need to worry’ – to ‘crikey’."

The End of "As We Know It".  The coming oil descent can be seen as both a crisis and an opportunity.    

The end of cheap oil will be the end of living life "As We Know It".  Those who try to continue doing things in the old ways that depend on cheap oil will experience severe hardships.   

Yet, there will be opportunities.  Those who prepare now will be better able to weather the storm, to see the rainbow on the other side.

The End of...Gas Guzzlers
 
To win WWII, Americans had to give up buying new cars, as auto factories were converted to weapons production.  The opposite will now be true -- we will need to buy different vehicles that use little or no gasoline or diesel.    

Think back to 2008.  When gas prices hit $4/gallon, families with gas guzzlers suddenly found they were paying $400/month for fuel.  Prices for very nice SUV's and heavy trucks plummeted -- you couldn't give them away.  Meanwhile, buyers lined up to buy hybrids.  The time to unload your gas guzzlers and buy something else is now. 

The End of...Cheap Food?
 
I love my big burgers, but this too may come to an end if corn-fed beef gets too pricey.  To replace a paltry 6% of U.S. gasoline, we already feed 1/3 of the entire U.S. corn crop to the corn ethanol industry, with impacts worldwide on crop prices, conversion of rain forest to cropland, and ocean dead zones from fertilizers. Ethanol corn use is projected to increase to 1/2 of the entire U.S. corn crop by 2015 under Congressional mandates. 

If you actually had to raid your refrigerator to fuel your car, you would see the obscenity of feeding food to machines. Yet this is exactly what we are doing.  One of the worst decisions ever made was to build the infrastructure to convert food crops to fuel, because we have now directly tied the price of food to the price of fuel.  As oil prices rise so will the price of food.

Even if we were not directly feeding our food supply to our machines, our very production of food is heavily dependent on petroleum. There may be hope -- a study just released by Iowa State University shows farmers could be just as productive using half their present fuel use. Yet, lower fuel use depends on crop-rotation away from fuel-intensive corn, a move unlikely to happen if corn prices are tied to skyrocketing oil prices. 

It is unlikely Congress will find the sanity to eliminate taxpayer subsidies of ethanol.  Therefore, a switch away from gasoline to electric vehicles may be the only way to keep food prices affordable.  

My big burger days may soon end -- but at least my waistline could be better for it.  Those whose waistlines are already too thin -- the billions of hungry people in the world -- will feel the impact of higher grain prices much more.  In 2008, food price riots broke out worldwide the last time oil prices skyrocketed.  We must stop feeding food to cars. 
The End of...Globalization?
  
Higher oil prices mean the world is about to get a lot smaller, as the cost of transporting goods halfway around the world will no longer be cheap.  Jeff Rubin, former chief economist at CIBC World Markets, argues  "a lot of long-lost jobs are going to be coming home".  

Rubin has written a book Why Your World Is About to Get a Whole Lot Smaller: Oil and the End of Globalization.  He notes that already in 2008 high oil prices began to make U.S. steel and furniture producers competitive again.  Rubin expects China's economic growth to be fueled more by growth in their own consumption. 

Walmart may once again carry products labeled "Made in USA". 

The End of...Pristine Wilderness?

Millions of us are now viewing once again the movie Avatar  -- James Cameron's wonderously beautiful tale of a pristine world.  This time, however, we are not magically transported to Pandora in a theater by the magic of 3D.  Instead, we may notice ourselves driving a small DVD home from the store in a 3,000 lb. vehicle, to view it on our big-screen TV.  

If we truly look at ourselves, we will see that we are the voracious society in search of our own "unobtanium ".  Our unobtanium is oil, and shouts of  "Drill, Baby, Drill!" have shown there are those among us who are willing to do anything, and destroy anything, to acquire it. 

As oil becomes scarce and prices skyrocket, these shouts will grow louder, coupled with skapegoating tactics to lay blame for the oil crisis at the feet of those who wish to preserve our most precious natural areas.   

There will once again be pressures to open to drilling Alaska's pristine wilderness, the Arctic National WIldlife Refuge.  If this is done, it will not solve the crisis, as EIA projected ANWR would likely reduce oil prices only 30-50 cents per barrel (about a penny per gallon of gasoline).  Yet, hunters take note, a wildlife area critical to scores of species of North American migratory birds would be violated. 

Despite the British Petroleum oil gusher in the Gulf of Mexico, expanded offshore oil development in all U.S. coastal waters will likely be approved.   Whether another Deepwater Horizon event occurs may be determined by whom we elect -- those most beholden to the oil companies, or those willing to strictly regulate them.

Canada has already begun the rape of its northern forests to exploit tar sands, the surface mining of which results in a landscape of complete devastation.  Similarly, there will be calls to utterly devastate the forests and water resources of Western Colorado to exploit oil shales. 

Only a move away from oil as quickly as possible can save these pristine areas from the destructive forces of a desperate society

We Can Do It.  Though Americans resisted the recognition that WWII was coming, once it came they rose valiantly to the call to action. A similar can-do spirit is needed now for the transition to a post-oil world.  

This crisis is coming soon.  It is too late to prevent it, so we simply need to get used to it.  Peak Oil is happening.

We will need to adapt -- but we can do that. 

We must repeat this to ourselves, as we face the challenging times ahead:

It's The End of the World (As We Know It) --  and I feel fine.


Scott's Contracting GREEN BUILDER, St Louis "Renewable Energy" Missouri.http://www.stlouisrenewableenergy.com, contact scotty@stlouisrenewableenergy.com for additional information

5.20.2010

St Louis Ameren UE Renewable Energy Info

Ameren UE Solar Renewable Energy Rebate Application and Rate Information. If needed information for Solar Panels, Inverters, Total Wattage, etc. email Scotty
AmerenUE's renewable energy initiatives

Leading the way to a secure energy future

Renewable energy is electric energy produced from sources that replenish themselves naturally, never run out, and are cleaner for the environment. These resources include:

Wind

Sunlight (solar energy)

Landfill and agricultural waste (biomass)

Water (some low-impact and run-of-river hydroelectric facilities)

As a responsible steward of the environment, Ameren is committed to exploring all of these renewable energy options. In fact, the company already has a number of renewable initiatives under way—see Facts about AmerenUE’s Commitment to Develop Renewable Energy Resources brochure. Other renewable initiatives include:

Pure Power

UE responded to the desires of its customers by offering a voluntary renewable energy program—Pure Power—this program empowers UE electric customers to support wind farms and other renewable energy facilities in the Midwest as well as contribute to regional development. See how the Pure Power program works at www.ameren.com/PurePower.

Participation in this program does not constitute the purchase of energy. Renewable energy credits which represent the environmental attributes associated with past renewable energy generation are retired on behalf of program participants. All renewable energy credits purchased under this program are Green-e certified by the independent Center for Resource Solutions.

Utility Scale Wind-Powered Electric Generation

Working with wind developers who seek partners to develop utility scale wind-powered electric generation (20 MW and larger) for our portfolio. See the latest news regarding our portfolio.

Methane to Megawatts Project

An agreement between AmerenUE and Fred Weber, Inc. includes plans to install combustion turbines capable of generating about 15 megawatts (MW) of electricity by burning methane gas at Fred Weber’s solid waste landfill in Maryland Heights, Missouri. See the latest news on the Methane to Megawatts project.

Solar Home

UE funded a project at the University of Missouri-Rolla to develop a solar home for entry in the U.S. Department of Energy (DOE) Solar Home Competition.

Missouri Schools Going Solar

Supported Missouri Schools Going Solar, a program in conjunction with the Missouri Department of Natural Resources that provided solar panels to schools.

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AmerenUE-Funded ‘Missouri Schools Going Solar’ Program Unveils First Solar Array Panel

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Missouri Schools Going Solar

Renewable Generating Opportunities

UE continues to pursue renewable generating opportunities, such as wind, solar, landfill gas, agricultural methane, hydro and other alternative energy sources to generate electricity. See details in our 20-year Integrated Resource Plan.

Clean Energy Message

UE has taken its clean energy message to school children (K-6th grade) at more than 350 Missouri schools, through the National Theatre for Children’s live production of “Boomerang Jack and the Unseen Green Machine.” More about the National Theatre for Children.

Net Metering

UE offers net metering. For net metering tariff details and required application (Sheet 13 includes the necessary documents for filing), see our Rates section.

Missouri's Proposition C

UE will comply with Missouri’s Proposition C, which passed on the Nov. 2008 ballot. The Public Service Commission in conjunction with the Department of Natural Resources began rulemaking for Proposition C in 2009; however, final rules have not been published to date. Primary effective date is January 1, 2011. For details on Proposition C, see the Missouri Secretary of State site. View the Missouri Solar Rebate Tariff information or access the Missouri Solar Rebate Application.

Hybrid Bucket Truck

We are one of the first utilities in the nation to place in service a hybrid bucket truck that uses both diesel fuel and electricity. See the Fact Sheet.

For more information about renewable energy at UE, contact our Renewables group at 314.554.2649 or lcosgrove@ameren.com.

Deck and Patio Maintenance Continued

Deck Safety & Maintenance Continued Contact:   Scotty to schedule free estimate for your Deck and Patio Maintenance and Building Needs
  • Loose or Corroded Fasteners

1. Tighten any loose fasteners (nails, screws, or anchors) and pound in any nails that have popped up.

2. Rusted or corroded fasteners need to be replaced because they can cause the surrounding wood to deteriorate.

3. The deck and stairs should appear even and should not sag, sway, or move when tested.

  • Finish

1. Clean away leaves and debris that can be slippery and promote mildew.

2. If mildew is present, or the deck coating has worn away, clean and apply a new waterproofing coating (which will help prevent split or decayed wood and loosened fasteners).

  • Grills, Fire Pits, and Chimineas

1. Make sure any source of fire is placed far away from flammable surfaces. (Or protect the deck surface with a nonflammable pad.)

2. Follow manufacturers' directions for using heaters.

3. Never leave candles unattended.

  • Lighting and Electrical

1. Make sure all lighting fixtures work.

2. Clean light covers to allow maximum light to shine through.

3. Trim any plants or tree limbs that may block light. Make sure all electrical outlets, appliances, and other features are up to code, in good condition, and childproof if children will be present.

4. Make sure electrical cords do not present a tripping hazard.

Article Continues>  click here .  To View the Entire Green Build Stair Case Photos> click here

Scotty with Scotts Contracting is available for all your Green Building Needs. 

http://www.stlouisrenewableenergy.blogspot.com
http://www.stlouisrenewableenergy.com
scotty@stlouisrenewableenergy.com

Deck and Patio Maintenance

Deck Safety Checklist

Follow the National American Deck & Railing Association's 10-point checklist to keep your deck safe and relaxing.

  • Railings and Banisters
1. Push on railings and banisters to make sure they're secure.
2. Check to make sure they're high enough to keep people safe (most codes require a 36-inch-high railing at minimum).
3. Rails should be no more than 4 inches apart (measured from the inside of the rail) to keep small children and pets from squeezing through. This is especially important if your deck is elevated.
  • Stairs

1. Check railings or handrails to make sure they are firmly in place.
2. Check the risers and stringers, the sides of the stairs that hold up the steps, to be certain they are securely attached.
3. If guardrails are used in the staircase, make sure they are no more than 4 inches apart.
4. If the area behind the stair treads is open, the opening should be no more than 4 inches high.
5. Keep stair pathways clear of planters, decor, and other items that present a tripping hazard.

  • Split or Decaying Wood

Rot is wood's worst enemy, so check several different areas of the deck to be sure the wood is still sound. This includes the ledger board (where the deck attaches to the house), support posts, joists underneath the deck, deck boards, railings, and stairs.
1. Use a tool such as an ice pick or screwdriver to penetrate the wood. If you can easily push 1/4 to 1/2 inch into the lumber, break off a sliver of wood without splinters, or discover that the wood is soft and spongy; your deck might be decaying. (Solid wood will resist the tool.) Small holes in the wood may indicate insects.
2. Replace the damaged wood to maintain strength and integrity.

Green Build Stair Case Remodel by Scott's Contracting

Scotty is available for Free Estimate, Design Consultation, Weatherization Services, and General Handyman Service for your Home and Small Business needs.

--
Scott's Contracting
scottscontracting@gmail.com
http://stlouisrenewableenergy.blogspot.com
http://www.stlouisrenewableenergy.com

Ethanol and the Gulf Spill

By Geoff Styles - Info Provided by: scotty,Scotts Contracting, Green Builder St Louis 'Renewable Energy' Missouri

The implications for the oil industry from the ongoing Gulf of Mexico oil spill are already taking shape, with the administration calling for a Challenger-style investigation and rewriting the playbook for oil & gas leasing and the issuance of safety and environmental permits for offshore drilling. It's less clear how the spill might affect other aspects of energy, beyond boosting the public's interest in pursuing clean energy options. However, it would be ironic if a problem perceived to have arisen because of a "cozy relationship" between oil companies and regulators resulted in an even cozier relationship between the government and the ethanol industry that depends on it for both financial support and the rules that mandate the use of its product. Yet that's exactly what could happen as the administration decides whether to increase the allowable percentage of ethanol in gasoline. read more:

Provided by:Scott's Contracting GREEN BUILDER, St Louis "Renewable Energy" Missouri.http://www.stlouisrenewableenergy.com, contact scotty@stlouisrenewableenergy.com for additional information

Retrofitting Your Home for Passive Solar: Adding Thermal Mass

In previous blogs in this series, I’ve been describing one way to solarize your home: by adding passive solar. The strategy I’ve been describing requires installation of windows on the south-facing walls of your home or business to allow the low-angled winter sun to enter, warming your home in the winter.

Sunroom If you end up dramatically increasing the amount of south-facing glass, however, you may need to add thermal mass inside your home or business. Thermal mass is any material that can absorb solar energy during the day and release it at night and on cold days. It serves as a heat sponge that prevents overheating. It helps maintain a more constant internal temperature. Tile, brick, concrete block, adobe blocks and concrete floors are good examples of thermal mass.

Thermal mass is easiest to install in new construction, and much more challenging to install in retrofits. Tiling floor or adding brick facing to nearby walls may help.

For best results, the thermal mass must be in direct contact with the sun. Adding a second layer of drywall to existing walls in direct contact with the incoming solar radiation works well, too. Mass should be a darker color to increase absorption of sunlight.

One note of caution in all of this: for best results, the south-facing windows you install should be shaded by eaves (overhang) to prevent heat gain in the cooling season. You may need to build eaves over these windows if there is no overhang on the south side of the building, or install retractable awnings that can be employed in the summer to prevent overheating.

Adding new windows is relatively inexpensive, though not cheap by any stretch of the imagination. It will help improve the energy performance and comfort of your home, if done correctly, and will increase the amount of daylighting. This, in turn, could reduce electrical costs by reducing the amount of artificial lighting.

Scott's Contracting GREEN BUILDER, St Louis "Renewable Energy" Missouri.http://www.stlouisrenewableenergy.com, contact scotty@stlouisrenewableenergy.com for additional information

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