Compound Hybrid Geothermal-Fossil Power Plants: Thermodynamic Analyses and Site-Specific Applications

[+] Author and Article Information
Ronald DiPippo

Mechanical Engineering Department, Southeastern Massachusetts University, North Dartmouth, Mass. 02747

Eileen A. DiPippo

Power Division, Stone and Webster Engineering Corp., Boston, Mass.

Joseph Kestin

Division of Engineering, Brown University, Providence, R.I.

H. E. Khalifa

Advanced Energy Conversion Systems, United Technologies Research Center, East Hartford, Conn.

J. Eng. Power 103(4), 797-804 (Oct 01, 1981) (8 pages) doi:10.1115/1.3230804 History: Received November 29, 1979; Online September 28, 2009


In this paper, we extend the analysis of hybrid fossil-geothermal power plants to compound systems which combine the features of the two previously analyzed hybrid plants, the geothermal preheat and the fossil superheat systems. Compound systems of the one- and two-stage type are considered. A complete summary of formulae to assess the performance of the plants is included for completeness. From the viewpoint of thermodynamics, compound hybrid plants are superior to individual all-geothermal and all-fossil plants, and have certain advantages over basic geothermal-preheat and fossil-superheat hybrid plants. The flexibility of compound hybrid systems is illustrated by showing how such plants might be used at several geothermal sites in the western United States.

Copyright © 1981 by ASME
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