Archive for the ‘Green Energy’ Category

New Tower Designs

Thursday, April 21st, 2011

Over the course of the past few months we have made a major technological breakthrough in the efficiency and output of solar updraft towers. At this point I hesitate to call the new towers “solar updraft” anymore. I think a better name would be a solar thermal tower.

We’ve reduced the overall tower height to 600 feet, and the diameter to 500 feet, yet we can move over 14 million cubic feet of air per second up the tower with wind speeds of over 40 miles per hour.

Our “greenhouse” is now used solely to remove turbulence in the incoming air stream and optimizing its angle of attack in relationship to our turbine blades.

These new designs will allow us to produce 30MW from a small tower using under 20 acres of land and nearly 100MW from our flagship quad-tower design using 40 acres of land.

This is a significant reduction in size compared to the proposed towers that are thousands of feet tall with greenhouses that cover thousands of acres.

I believe that the proposed size of the outdated tower designs have been the major hindrance in bringing this technology to market. Building a tower a few thousand feet tall requires special (read very expensive) engineering and equipment. Our new tower design can be built using standard methods requiring no specialized engineering.

We are currently working on a new design that will allow our towers to top out at 300 feet with the same outputs stated above.

Innovation is what will set us apart from other renewable energy companies pursuing similar technologies. Further innovation is needed to bring this 40 year old technology to the forefront of green energy, but our current improvements are bring us closer to a marketable utility-scale output than ever before.

We will be posting new information on the website soon.

Where does oil come from?

Thursday, August 13th, 2009

Its been said many times that we are running out of oil. That in ten years we’ll run dry and society will cease to function unless we find some new energy source.

Well those ten years have come and passed many times and we still continue to pump oil from the ground. The problem with this alarmist theory is that we honestly don’t know where oil comes from.

Sure, the popular theory that oil is a result of organic material decomposing under pressure for millions of years sounds feasible, but the odds of this organic material all collecting on the same location and decomposing is rather slim. I wouldn’t bet on those odds.

No, my belief is that oil is a byproduct of the heat and pressure at the Earth’s core. The Russians have used this theory since the 1950s and started drilling deep for oil and they’ve found it where it shouldn’t be. Too deep to be of organic origins.

So what does this mean? If oil isn’t of organic origins, but a byproduct of activity at the Earth’s core, that means we have a much larger supply of oil that we know what to do with. We just need to drill deeper.

But how deep is too deep? Where does the ROI increase the price of oil too much that it no longer becomes a feasible energy source? These are answers we can’t answer now, or anywhere in the near future, because we have no idea how much oil is down there.

What this means is that we need to start finding alternative energy sources now. We can not invent and prefect a new energy source at the same time. This take times, first comes the invention, then years of trials to make it a feasible and reliable energy source.

I see this as where we as a people are failing. We have politicians trying to end our oil dependency prematurely, and theres not a viable alternative yet. Sure solar, wind, and geothermal are available, but their output is just a fraction of our needs, and they can never really be a replacement for oil-based energy production, simply a supplement to it. Just as Ethanol is a short-term and short-sighted replacement for gasoline and diesel as motor fuels.

G. Grant Lowrance
Parrilla Energy

The Renewable Energy Industry Must Double In Size In The Next Few Years

Wednesday, July 29th, 2009
Renewable energy is a $7 billion industry. The US government has an order in place to purchase 20% of its energy
from renewable sources. Many states have mandates stating 20% of their electricity must be clean and
renewable by 2012. To do this the renewable energy industry must double in size in the next few years.
Renewable energy is a $7 billion industry. The US government has an order in place to purchase 20% of its energy from renewable sources. Many states have mandates stating 20% of their electricity must be clean and renewable by 2012. To do this the renewable energy industry must double in size in the next few years.

G. Grant Lowrance
Parrilla Energy

The Real Reason High Oil Prices Are Good For Wind Energy

Wednesday, July 29th, 2009

There are multiple production methods of electricity and the retail price of electricity rises when the most expensive method of production costs rises. Simply put, when oil prices rise, the cost of producing electricity with oil rises. Wind energy production costs stay the same, the fuel is free, but we can then charge more for our electricity, thereby raising our margins. Rarely, if ever, does the retail price of electricity drop. Once the price rises, it stays up.

G. Grant Lowrance
Parrilla Energy

What is “Green Energy”?

Wednesday, July 29th, 2009

The words “green energy” are thrown around quite a bit these days, but I don’t think most people understand exactly what green energy is. Is it green because its renewable? Is it green because its clean?

Green energy can be many things to many people, depending on your needs and political persuasion. Green can be hydro-electric, but is it green if it damns rivers and blocks the spawning paths of fish? Nuclear power is green, creating pollution-less power for many years. But is it green if the spent fuel is deadly and a meltdown can be an ecological disaster? Modern propane and coal power plants are very clean, but are they considered green if the process of acquiring fuel for them pollutes and destroys ecosystems?

That leaves us with three energy sources: wind, solar, and solar updraft towers.

Wind turbines can produce prodigious amounts of electricity from a rather small footprint. It’s fuel is free and undepletable. Wind turbines are scalable power, you build for your current needs and add more turbines as your demands increase. Wind energy is also very clean, with no by-products or harmful exhausts. The only downside of wind energy is that wind is not constant. Its flow can be predictable, and with careful planning and research locations can be found that are not only near the power grid (to alleviate the need to build more power lines) but provide a near-constant flow of wind at speeds necessary to produce utility-scale electricity.

Solar power has seen a revival in the past few years. Home developers are offering “solar roofs” to new home buyers. These are typically at a $30,000 premium over the price of a comparable house, but there are state and federal tax credits that offset the initial cost of the solar cells. The solar roofs provide between 75% to 110% of the electricity needed to power an average energy-efficient house. The only drawback is in 20 years when the solar cells need to be replaced, the tax credits that offset their purchase price wont be in effect, so the homeowner will be stuck with a $30,000 bill to replace the cells or convert back over to strictly grid-power. Two choices I don’t care for.

Solar updraft towers are an interesting concept: utilize the greenhouse effect to heat air that in turn powers wind turbines. Clean, fairly efficient, with very few moving parts and very little need for new innovations to make them work well. They produce power on hot days, cold days with sunlight, and warm nights. The only drawback is their size. They require a very large tower, typically over 1000 feet high and a few hundred feet wide, and many acres of flat ground covered in a greenhouse. The best locations would be in deserts, but typically there are no connections to power grids in the desert areas.

I believe that there is a need for clean, renewable energy. I don’t think there is one cookie-cutter solution, though. Every region has a unique set of variables that need to be addressed in order to maximize the effectiveness of the green energy source. This is a challenge we will face in the coming years as we are transitioned to a green economy, but with proper planning and research we should be able to meet that challenge head on.

G. Grant Lowrance
Parrilla Energy