General Methodology

Sources: Most of the performance and cost estimates for the 1997 technology has been drawn from the EPRI 1996 "Next Generation Geothermal Power Plants" (NGGPP) study [1]. Starting from the NGGPP estimates, this TC adds performance and cost factors to exploration and reservoir management processes to represent geothermal "field" technologies more accurately.

Scope: This TC includes both Flash Steam and "Binary" conversion systems because: (a) those technologies cove r the temperature range at geothermal reservoirs currently under production; (b) they share many subcomponents , especially all aspects of finding, producing, and injecting geothermal fluids; (c) they serve the same markets; an d (d) the distinctions of when to use them and what other conversion subsystem designs might modify or replace the m are beginning to blur.

Process and Status: Industry and laboratory experts were interviewed to formulate the estimates of how thes e technologies will be improved over time. Processes to obtain such inputs have been active since 1989, when th e Department of Energy Technology Characterization process was initiated. The estimates provided here are based o n continuing updates of assessments conducted for OGT in 1990 and 1993 [17]. Polling of experts was renewed in 1997 because of large changes in some aspects of system designs and component costs.

Solar Stirling Engine Basics Explained

Solar Stirling Engine Basics Explained

The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

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