Showing posts with label turbine. Show all posts
Showing posts with label turbine. Show all posts

Friday, February 20, 2009

Wind Power Bull

In a way this is important. Putting up a wind turbine has become as common place as buying a car and the permitting process has also become noncontroversial. It helps to recall that this has taken twenty years of build out around the world after twenty years of perfecting the technology.

Rather importantly, these wind turbines are obviously working financially for their owners and for the power companies also. That means in a world with a paucity of safe investments, these investments are gold.

We can expect the build out of these turbines to continue booming until the installed base is maximized at an order of magnitude higher. I cannot think of a better industrial stimulus program to replace the failed housing stimulus plan that foundered in the morass of sub prime lending.

Other technologies are rising but are still in the maturation stage. This is important to understand. We cannot buy time to make a technology bullet proof. Wind technology is presently bullet proof and it has cost forty years to achieve this.

It therefore make great sense to load our grid with as much wind power as can be properly handled, say 20% to 30% of grid load. It has certainly succeeded in Europe and is obviously working everywhere else.

It is not the final answer, but it is a great stimulating solution for the next five years while we get over the subprime hangover.
What is wonderful, is that individual investors can easily participate in this build out, by simply identifying location and working through the permitting and acquisition process.


US Officially Leads World in Wind

http://www.ecogeek.org/content/view/2543/86/

Written by Jack Moins

Friday, 06 February 2009

The Global Wind Energy Council (
GWEC), a consortium of wind power supporters, based out of Brussels has announced some news that will have a lot of us pretty geeked. Last year, they revealed, showed tremendous gains in the wind market, growing 28.8 percent, to reach 120 GW of installed capacity.
Steve Sawyer, Secretary General of GWEC adds, "The 120 GW of global wind capacity in place at the end of 2008 will produce 260 TWh and save 158 million tons of CO2 every year."
In the race fight climate change, and move away from geopolitically volatile, deletable fossil fuels, wind offers the promise of oodles of largely untapped power. As Bob Dylan would say, "The answer my friends, is blowing in the wind."
Last year the U.S. started to exploit this resource in earnest, with
50 percent growth, to reach 25 GW of capacity. The big news is that for the first time the U.S. seized the world lead in wind power production, wresting it from former champion Germany.
This year, Germany came in a close second at 24 MW, while alternative-energy-friendly-Spain filled in at third. China, though, perhaps earns the biggest pat on the back for
taking fourth place after managing to double its growth for the fourth year in a row. If it continues on this pace, it may soon seize the wind power lead, and help get the coal power monkey off its back.

Cost wise, wind is relatively affordable, almost as cheap as coal and nuclear, and significantly cheaper than solar. However, the unprecedented wind power growth also brings challenges. The young industry has yet to figure out a good scheme to store power to offset its variable nature, much like solar. However, with money and projects flowing in like, well... the wind, the industry seems ready to tackle such a challenge.


Tuesday, February 3, 2009

Whirlpool Power Device Solves Power Dam Salmon Transit Problem

Sometimes we come across a bit of new technology that is way more important than imagined by the developer. This is one of those. Before we get to that though, this is an important new innovation because it permits easy exploitation of run of the river power opportunities were reservoirs are inconvenient. Also every river can locate a one meter drop just about anywhere, and you do not have to put the whole river through the mill.

The picture shows a millrace feeding a prop which spins slowly with a high torque, allowing the passage of fish down through the prop. I do not expect fish to swim up through the prop, but it is only one meter and less likely things sometimes work. More likely, and what is shown in the drawings on the home site is a bypass channel that can obviously be replaced by a fish ladder to reduce wastage.

Most important is that a fish can swim past this system up stream. On top of that, the system as illustrated can obviously be stacked as a double silo to any necessary height. This means we have a feasible way to allow migrating fish to bypass a tall power dam safely.

We currently are trucking fish past dams and it unsatisfactory. Here we have a solution that also produces power to support its upkeep.

This directly solves the problem of sharing a salmon fishery with dam. We still have to work to maintain appropriate streams and gravel washes but that is the easy part that needs regulation and a little care. This promises to even be beneficial to the salmon since a dammed river system has eliminated most of the natural hazards and has opened up ample potential spawning beds and rearing areas



Capturing the Power of Whirlpools

http://www.ecogeek.org/content/view/2488/85/

Written by Philip Proefrock

Monday, 19 January 2009

An Austrian engineer, Franz Zotlöterer, has developed a new method for small scale hydropower by creating a whirlpool that avoids many of the problems typically associated with hydroelectric generation.

In terms of green power generation, solar and wind get much of the attention. Hydropower is as green as wind and solar in terms of limiting emissions, but some of the ecosystem disruption associated with large-scale hydro have taken it off the table as a choice for good green power. However, smaller scale hydropower options can provide electrical power and provide additional benefits to the waterway.

The original idea behind the vortex was, in fact, not power generation, but water purification. A vortex in the water serves to efficiently aerate the water and to aid in more rapid breakdown of contaminants.

The idea to use a continuous, strong vortex flow actually occurred to Franz Zotlöterer while trying to solve the inherent problems with water quality of the natural swimming pond he had set up in his own garden. He finally decided to build a small rotation basin to aerate the water – and it worked. He then began to think about other potential fields of application for his aeration concept: drinking water supply, wastewater treatment, electricity generation.
- Aquamedia

Instead of channeling the water directly through a turbine, vortex hydropower creates a spinning vortex, and draws energy from the swirling water. This approach makes it possible to generate energy without completely blocking the waterway and eliminates the need for much screening or filtration. Small debris is not a problem for vortex generation as it would be for a conventional turbine. Furthermore, fish are able to pass by the vortex chamber without harm. The vortex operates at slower speeds, and the large open chamber makes it possible for fish to pass even going upstream. The vortex also reduces the temperature change of the water, and can more readily be integrated into the natural river environment.

The pilot plant only needs a fall of 1.3 meters (4.25 feet) and, with a flow rate of 1 cubic meter per second (about 265 gallons per second), produces 8 kW of electricity, enough for about 14 average European homes. A head of as little as 0.7 meters (2.25 feet) is possible for a vortex generator. The much lower rise makes it easier to locate a vortex generator on a smaller waterway, without the need for high dams and other interventions typically associated with hydropower.

The vortex system is about 80% efficient, comparable to a standard turbine. However, the vortex cannot scale as large as a turbine power plant. A vortex has a range of performance up to about 150 kW, while a traditional turbine can reach up to 100 MW.

A system that both generates electricity and helps to clean and purify the water is a great technology of the kind we like to see.

Thanks for the tip, VikingHouse

For much more technical detail see;