The Chena Hot Springs 400kw Geothermal Power Plant: Experience Gained During the First Year of Operation

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Journal Article: The Chena Hot Springs 400kw Geothermal Power Plant: Experience Gained During the First Year of Operation

Abstract
In July 2006, Chena Hot Springs Resort installed the firstof two 200kW Organic Rankine Cycle (ORC) power plantmodules designed and built by United Technologies Corporation(UTC) at their Hartford, Connecticut research facility.The second unit was brought online the following December.The modules were designed based on the PureCycle 200product released by UTC in 2004 and designed to operate offindustrial waste heat applications. The PureCycle 200 usescomponents and hardware from the Carrier Refrigerationline, which is a division of UTC, in over 90% of the system.This greatly reduces the upfront cost of the equipment sinceair-conditioning equipment has a cost structure significantlylower than traditional power generation equipment. This issignificant because Chena Hot Springs is a moderate temperaturegeothermal resource with a maximum produced watertemperature of only 165°F. For this reason, any ORC designedto generate power from the Chena resource is saddled with aninherently a low thermal efficiency. Low efficiency requiresincreased power plant equipment size (turbine, condenser,pump and boiler) that can ordinarily become cost prohibitive.One of the main goals for the Chena project was to reduce theequipment cost of these UTC designed PureCycle modulesto $1300 per kW.This paper describes the site preparation, installation andoperation of the two PureCycle 200 units, and experiencegained as the first anniversary of the installation approaches.This paper does not focus on the design of the system, whichhas already been covered in two previous papers presented atthe 2005 (Joost, Biederman, Holdmann) and 2006 (Cogswell)GRC Annual Meeting.

Author 
Gwen Holdmann








Published Journal 
Chena Geothermal Power Plant Report, Chena Power Plant, Alaska, 2007





DOI 
Not Provided
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Online 
Internet link for The Chena Hot Springs 400kw Geothermal Power Plant: Experience Gained During the First Year of Operation

Citation

Gwen Holdmann. 2007. The Chena Hot Springs 400kw Geothermal Power Plant: Experience Gained During the First Year of Operation. Chena Geothermal Power Plant Report, Chena Power Plant, Alaska. 1-9.