Re: New Coal Power Plants

peterwezeman@xxxxxxxxxxx wrote:

I heard on the radio that utilities building new coal fired plants
generally prefer conventional steam plants rather than the newer design
where the coal is gasified and then burned in a gas turbine with steam
bottoming cycle. I find this somewhat surprising as the gasification
plants have a thermal efficiency of 45 percent versus 30-35 percent for
steam plants, and gasification plants have been operating successfully
in this country for over a decade. Are the costs of a gasification
system so great as to offset the increase in efficiency?

I'm not sure there *is* any increase in efficiency. At
http://pepei.pennnet.com/Articles/Article_Display.cfm?Section=Archives&Subsection=Display&ARTICLE_ID=152601
are efficiency data for some power plants
that were going into service in 2000;
percentage efficiencies were over 40.


--- Graham Cowan, former hydrogen fan
Boron: fire with nuclear cachet http://tinyurl.com/4xt8g
.

Relevant Pages

  • Re: New Coal Power Plants
    ... generally prefer conventional steam plants rather than the newer design ... I find this somewhat surprising as the gasification ...
    (sci.energy)
  • New Coal Power Plants
    ... I heard on the radio that utilities building new coal fired plants ... generally prefer conventional steam plants rather than the newer design ... I find this somewhat surprising as the gasification ...
    (sci.energy)
  • Re: New Coal Power Plants
    ... I heard on the radio that utilities building new coal fired plants ... generally prefer conventional steam plants rather than the newer design ... where the coal is gasified and then burned in a gas turbine with steam ... system so great as to offset the increase in efficiency? ...
    (sci.energy)
  • Re: Green Energy: Applleication to build two US nuclear reactors
    ... about 35% efficiency to 50% efficiency, and don't pollute downtown. ... turbine efficiency. ... Even without combined cycle technology new coal plants can be from 40% to ...
    (sci.energy)
  • filthy coal is cheaper and far nastier......but claim that solar pv makes another step forward....
    ... billion to the capital cost of a power plant, not including efficiency ... In Europe, Germany is building 16 new plants to come on line by 2012, ... power plants and Britain has endorsed new coal. ... "Today's solar cells absorb only visible light, ...
    (uk.politics.misc)