RexRed
 
  1  
Reply Thu 27 Oct, 2011 10:59 pm
http://www.networkworld.com/community/blog/us-fund-aggressive-technology-cuts-solar-powe
georgeob1
 
  1  
Reply Fri 28 Oct, 2011 11:42 am
@RexRed,
It's an interesting article that illuminates several key issues.
1. In the first place the DOE is investing in thermal collection of solar energy for use in a heat engine, as opposed to photo voltaic collectors. The reason for this is the perception that the needed efficiency gains to reduce the cost from $.21/KW-Hr to $.06/Kw-Hr to compete with conventional sources (coal & nuclear) are not likely fron photo voltaic collectors.

2. The listed new technological breakthroughs for thermal solar collection, which include things as far ranging as energy storage/recovery systems, "novel" new materials & coating for collectors, high temperature heat cycles and autonomous controls, etc, all portent sill very challenging technological barriers to success. The energy storage problem is likely the most intractable - there are many potential technologies for this but all of them yield at most recovery of 60% of the energy stored - a very significant inefficiency.

The bottom line here is that solar power, though well worth the investment in research, isn't likely to become a competitive source of bulk energy production for at least twenty years, or more.

There are no technilogical breakthroughs indicated for wind power (propellers have been around for a long time). Thus renewable sources of electrical energy will not be significant contributors to our energy needs for at least a couple of decades.

We need to quickly start building more nuclear plants and new infrastructure fort natural gas if we wish to shut down the 50% of our electrical power currentl;y produced by coal fired plants.
0 Replies
 
RexRed
 
  1  
Reply Sun 30 Oct, 2011 10:19 pm
http://www.itworld.com/data-centerservers/217417/apple-tills-solar-farm-power-its-data-center
0 Replies
 
RexRed
 
  1  
Reply Wed 2 Nov, 2011 03:34 pm
Ant frying tech could make solar cheap

http://futureoftech.msnbc.msn.com/_news/2011/11/02/8600889-ant-frying-tech-could-make-solar-cheap

0 Replies
 
RexRed
 
  1  
Reply Wed 2 Nov, 2011 10:29 pm
New thorium reactor in India by end of decade.

http://www.guardian.co.uk/environment/2011/nov/01/india-thorium-nuclear-plant
georgeob1
 
  1  
Reply Thu 3 Nov, 2011 09:40 am
@RexRed,
Thorium is abundant in the earth's crust - a pleantiful and ubiquirous potential source of fuel. However, from an engineering viewpoint, I am a bit skeptical of the relative advantages of a thorium reactor. Interestingly there is no shortage of nuclear fuel even without thorium. There is lots of recoverable uranium in the world and in our country; along with new designs of uranium reactors, including breeder reactors that produce fissionable plutonium along with their power; and fast (neutron) fission reactors that use other isotopes, producing both useable power and recyclable new fuel sources - all tested, proven and available. In addition there are new generations of U-235 reactor designs that are inherently safe from loss of coolant events and promise higher temperature gains in thermodynamioc efficiency.

Increased use of nuclear power is an obvious solution to our energy problem. Moreover, it is far safer than coal, does far less damage to the environment than coal or wind/solar farms and is cheaper than any of them.
0 Replies
 
RexRed
 
  1  
Reply Wed 9 Nov, 2011 09:17 pm
Carbon capture plan for Peterhead
http://www.bbc.co.uk/news/uk-scotland-scotland-business-15650454
0 Replies
 
RexRed
 
  1  
Reply Mon 14 Nov, 2011 02:56 pm
Orbital solar power plants could meet Earth's energy needs
Harvesting the sun's energy from space could provide cost-effective power within 30 years

http://www.msnbc.msn.com/id/45288950/ns/technology_and_science-innovation/#.TsF_7sMr27s
georgeob1
 
  2  
Reply Mon 14 Nov, 2011 03:20 pm
@RexRed,
Interesting concept requiring only an order of magnitude advance in cost and capability of systems for transporting and assembling heavy materials in geosynchronour orbit. The artcle didn't address the risks associated with automated microwave relay of Giga Watt power transmissions to earth - a small aiming error could fry everything it touches.

Still an interesting idea. However, t he notion that it could be designed and deployed in thirty years is a fantasy.
0 Replies
 
RexRed
 
  1  
Reply Mon 21 Nov, 2011 01:19 am
Meet a 13-year-old solar panel developer
http://whatsnext.blogs.cnn.com/2011/11/18/meet-a-13-year-old-solar-panel-developer/
0 Replies
 
RexRed
 
  1  
Reply Thu 24 Nov, 2011 06:56 pm
Wind Power Gets Huge Boost With Pennsylvania Project
http://idealab.talkingpointsmemo.com/2011/11/wind-power-gets-huge-boost-with-pa-project.php?ref=fpnewsfeed
georgeob1
 
  1  
Reply Thu 24 Nov, 2011 10:24 pm
@RexRed,
The article is highly deceptive on several levels.

The most glaring is the implied claim that the 140MW of installed wind generating capacity will actually produce 140 MW of electrical power. The truth is that the best modern on shore wind turbines produce, on average, only 28% of their rated power - in this case about 39 MW. The reason; the wind doesn't blow all the time and wind turbines must be designed to handle the highest sustained local winds, as opposed to the average which is much less.

Coal-fired or nuclear power plants are limited only by required shutdowns for maintenance and economic factors relating th the relative costs of their fuel. The 100 nuclear plants in this country have averaged an output greater than 90% of their maximum rated power continuously for the last ten years: coal plants somewhat less, about 75%, and that only because they are shutdown first during periods of low demand because their fuel cost is much higher than that of the nuclear plants. The standard coal or nuclear plant is rated at 1,150 MW with an average output of 1,058MW for nuclear plants and 860MW for coal plants.

Thus the expected output of this 7,700 acre (12 square miles), $350 million wind farm will be just 3.7% that of a standard nuclear plant occupying just 300 (or so) acres, and on a unit of output basis will cost 40% more to build. Moreover its operating costs, based on recent history will be almost three times that of a nuclear plant on a similar unit of output basis.

The second element of deception is the complete lack of meaningful comparisons with other sources of power. While this may well be the largest wind project in the State, it represents only a trivial fraction of the state's consumption. It will take only 27 or so such wind farms, costing $9.45 billion and occupying 325 square miles to equal the output of a single $6.5 billion modern nuclear plant occupying a few hundred acres.
0 Replies
 
RexRed
 
  1  
Reply Mon 28 Nov, 2011 04:14 am
For solar energy which is supposedly not worth investing in it seems like big stakes.

Now China to probe U.S. renewable energy support

http://www.reuters.com/article/2011/11/25/us-china-usa-energy-idUSTRE7AO05I20111125
0 Replies
 
RexRed
 
  1  
Reply Mon 28 Nov, 2011 04:19 am
Largest Tesla Coils Ever Will Recreate Natural Lightning

http://techzwn.com/2011/11/largest-tesla-coils-ever-will-recreate-natural-lightning/
0 Replies
 
RexRed
 
  1  
Reply Mon 28 Nov, 2011 11:40 pm
Bright ides from inquisitive minds

Who Said Wind Power Couldn't Be Pretty?

http://www.environmentalgraffiti.com/news-windylights
0 Replies
 
RexRed
 
  1  
Reply Fri 2 Dec, 2011 02:04 am
Should Composting Be Mandatory?

http://www.theatlanticcities.com/politics/2011/11/composting-be-mandatory/587/
0 Replies
 
RexRed
 
  1  
Reply Fri 9 Dec, 2011 03:41 pm
Glowing bacteria could power 'bio-light'

http://www.cnn.com/2011/12/03/tech/innovation/bio-light-eco-system/index.html
0 Replies
 
RexRed
 
  1  
Reply Thu 15 Dec, 2011 12:06 am
Idea, build high pollutant factories in space transport energy to earth through monolithic atmospheric impervious batteries.
0 Replies
 
RexRed
 
  1  
Reply Fri 16 Dec, 2011 07:25 pm
What the Higgs Boson Does (infographic)

http://www.livescience.com/17431-higgs-boson-god-particle-infographic.html
0 Replies
 
RexRed
 
  1  
Reply Fri 16 Dec, 2011 07:27 pm
8 Stories Buried By the Corporate Media That You Need to Know About

http://www.alternet.org/story/153455/8_stories_buried_by_the_corporate_media_that_you_need_to_know_about/
0 Replies
 
 

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