High geothermal energy utilization geothermal/fossil hybrid power cycle: a preliminary investigation

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Combining geothermal and fossil fuel energy into the so-called hybrid cycle is compared with a state-of-the-art double-flash geothermal power cycle using resources which vary from 429/sup 0/K (312/sup 0/F) to 588/sup 0/K (598/sup 0/F). It is demonstrated that a hybrid plant can compete thermodynamically with the combined output from both a fossil-fired and a geothermal plant operating separately. Economic comparison of the hybrid and double-flash cycles is outlined, and results are presented that indicate the performance of marginal hydrothermal resources may be improved enough to compete with existing power cycles on a cost basis. It is also concluded that on ... continued below

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Pages: 107

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Grijalva, R. L. & Sanemitsu, S. K. November 1, 1978.

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Description

Combining geothermal and fossil fuel energy into the so-called hybrid cycle is compared with a state-of-the-art double-flash geothermal power cycle using resources which vary from 429/sup 0/K (312/sup 0/F) to 588/sup 0/K (598/sup 0/F). It is demonstrated that a hybrid plant can compete thermodynamically with the combined output from both a fossil-fired and a geothermal plant operating separately. Economic comparison of the hybrid and double-flash cycles is outlined, and results are presented that indicate the performance of marginal hydrothermal resources may be improved enough to compete with existing power cycles on a cost basis. It is also concluded that on a site-specific basis a hybrid cycle is capable of complementing double-flash cycles at large-capacity resources, and can operate in a cycling load mode at constant geothermal fluid flow rate.

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Pages: 107

Notes

Dep. NTIS, PC A06/MF A01.

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  • Report No.: SAN-1572-T1
  • Grant Number: EG-77-G-03-1572
  • DOI: 10.2172/5753833 | External Link
  • Office of Scientific & Technical Information Report Number: 5753833
  • Archival Resource Key: ark:/67531/metadc1103209

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • November 1, 1978

Added to The UNT Digital Library

  • Feb. 18, 2018, 3:59 p.m.

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  • April 2, 2018, 1:17 p.m.

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Grijalva, R. L. & Sanemitsu, S. K. High geothermal energy utilization geothermal/fossil hybrid power cycle: a preliminary investigation, report, November 1, 1978; United States. (digital.library.unt.edu/ark:/67531/metadc1103209/: accessed May 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.