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New Siemens Gas Turbine Exceeds Original Rated Output; 60%+ Efficiency

A new gas turbine from Siemens, the largest ever built, has successfully completed testing at the E.ON power plant in Irsching, near Ingolstadt in Bavaria. In the process, it has posted a new record, running for more than 1,200 hours at full load. It also significantly exceeded its original rated output of 340 megawatts.

The Siemens turbine. Click to enlarge.

Analysis of measurement data showed that the rated output can be increased to 370 megawatts. The next phase of the project involves connecting the gas turbine to a steam turbine. Once it is operating in combined-cycle mode, output will rise to over 570 megawatts, thus providing electricity for around 3.2 million people.

The efficiency of the combined-cycle plant is projected at over 60%, two percentage points above the figure for what is currently the world’s most efficient combined-cycle plant, also from Siemens.

An increase of two percentage points in efficiency has a substantial impact on the level of carbon dioxide emissions, reducing CO2 output by 43,000 metric tons per year.

The gas turbine weighs 440 metric tons. Just one of its roughly 1,000 turbine blades generates ten times as much power as a Porsche 911.

A ceramic coating as insulation and other adhesive coatings make the blades on the front rings impervious to combustion temperatures of up to 1,500 ° C. These special coatings give the turbine a total service life of 25,000 hours—six times longer than pure metal would survive if exposed to the flow of the hot combustion gases. Steel makes up 95% of the gas turbine.



The current recovery programs could support the installation of a few hundred of these to replace the oldest of the 700+ coal fired power plants in USA and Canada. It could be a quicker way to reduce GHG in both countries and would make PHEVs and BEVs more advantageous yet.


I agree, they might even make the input to them natural gas or IGCC and run the steam turbines off the hot turbine exhaust. Coal plants were told to upgrade if they expanded and then told that was not necessary. Consistent policies might help a lot.


Energy companies in natural gas-rich states like Texas should figure out a way to use more nat gas turbines for baseload electricity instead of new coal burning power plants. Texas coal fired plants rely primarily on coal burned from nearby strip mines, which is very wasteful. Wasteful as it is though, the long term economics favor the strip mining...especially with the predictability of coal prices & knowing where the resource is and how to get it in a systematic way, vs. natural gas wells which produce strongly for a couple years then drop off steeply soon thereafter. You'd think there'd be a way for the energy companies to get stakes in the drilling, distribution and storage of nat gas to mitigate for price fluctuations so it'd be more attractive at the end of the day. Guess we'll see eventually.


The recent massive swings in Ng price is (only)partly due to reduced demands during the current economic slow down. As usual, speculators have played their game to benefit from the wide price changes.

One way to stabilize NG price would be to stop speculation or reduce the role or impact of speculators on NG market place. End users-distributors could be the only buyers...directly from producers thru long term contracts without Wall Streets speculators being involved.

Alternatively, Governments could buy and store huge NG stocks and use it to stabilize the price or; simply impose some type of indirect price control thru trading fees etc.


Natural gas prices have been up and down. Allen Greenspan talked about a shortage of natural gas in 2003, then production happened and the price fell. This has been the case since deregulation. If I were in the business, I would want some predictability so that I could plan.

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