Electronics Forum / Electrical Engineering / October 2007

Try the Chena Hot Springs site at:
http://www.yourownpower.com/
and more details at:
http://www.yourownpower.com/New/

I have been there and they are producing electricity with water that
comes out of the earth at only 162 degrees F.

The Chena Hot Springs geothermal power plant is currently operating as
the base load for the site, and United Technologies representatives
are on hand completing performance tests by varying the hot and cold
water flow rates. The power plant has been running flawlessly, and is
running off 162.5F hot water from a 700ft deep well. The cooling water
source is from a cold water well at a higher elevation than the power
plant, and is delivered via siphon (gravity feed). This means no pump
needed to move the cold water through the power plant, reducing the
parasitic load on the plant.

Chena Hot Springs is excited to announce the second ORC generator is
online and producing 230kW gross (200kW net).  The second unit uses a
dual condenser system with an air-cooled condenser used during the
winter months to take advantage of the extreme temperatures (a balmy
-25F today in Fairbanks).  In the summer, the unit will use a water-
cooled condenser identical to the first ORC unit.  This allows for
maximum efficiency and flexibility in all conditions.