Hakimul Batih 4/26/2011

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Dear Tory,

I have question about geothermal efficiency in LEAP's technology data base. under the folder of EPRI TAG geothermal efficiency is 10-12% but under the folder of DOE EPRI and AEO99 it say that geothermal efficiency is 100%. It seems to me that EPRI TAG data base is the realistic one because geothermal fluids do not reach the high temperatures of steam from boilers, this make the thermal efficiency relatively low (http://en.wikipedia.org/wiki/Geothermal_energy). Could you please give the idea,assumption, or explain what kind of efficiency that make DOE EPRI and AEO99 put 100% efficiency of geothermal power plant?

Thank you

Best Regards,

Batih

Tory Clark 4/26/2011
 

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Hi Batih,

I've quickly looked at these resources and I agree that TAG seems to be best resource for thermal efficiency for geothermal systems. You can read more about the background assumptions from EPRI here (from the updated 2005 edition):

http://tinyurl.com/3apdjt7

The DOE EPRI data source, the Renewable Energy Technology Characterizations, can be found here:

http://www1.eere.energy.gov/ba/pba/tech_characterizations.html

And the latest AEO data (2010) can be found here:

http://www.eia.doe.gov/oiaf/aeo/assumption/pdf/electricity_tbls.pdf

Hope this helps, and thank you for the feedback. We hope to update TED with more current data for a future release of LEAP. For now I recommend using TED as a starting point for data sources and then using a search engine to find the latest version of that data.

Tory

Hakimul Batih 4/27/2011
 

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Thank you Tory,

This really helps. TED database is important at least for data comparison especially for site specific system such as geothermal.

Regards,

Batih