Geothermal preheating in fossil-fired steam power plants

Khalifa, H E; DiPippo, R; Kestin, J

doi:10.2172/6565025

Title: Geothermal preheating in fossil-fired steam power plants

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Abstract

A thermodynamic analysis of a hybrid fossil geothermal power plant in which the low-grade geothermal energy is used for preheating the feedwater in a fossil-fired steam power plant is presented. By restricting the geofluid to sensible heat addition, the entropy production in this process can be reduced. This results in an overall improvement in the utilization of the two energy sources. The performance of the hybrid system is studied in terms of suitably defined figures of merit. These include criteria for the choice of the appropriate hybrid utilization strategy, given the finite nature of geothermal and fossil resources. The question of optimum bleed conditions in a cycle comprising both geothermal and regenerative feedwater heating is discussed.

Authors:: Khalifa, H E; DiPippo, R; Kestin, J

Publication Date:: Wed Mar 01 00:00:00 EST 1978

Research Org.:: Brown Univ., Providence, RI (USA). Div. of Engineering

OSTI Identifier:: 6565025

Report Number(s):: COO-4051-19

DOE Contract Number:: EY-76-S-02-4051

Resource Type:: Technical Report

Country of Publication:: United States

Language:: English

Subject:: 15 GEOTHERMAL ENERGY; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; FEEDWATER; GEOTHERMAL HEATING; FOSSIL-FUEL POWER PLANTS; HYBRID SYSTEMS; GEOTHERMAL POWER PLANTS; DIAGRAMS; ENTROPY; PERFORMANCE; REGENERATION; STEAM TURBINES; THERMODYNAMICS; HEATING; HYDROGEN COMPOUNDS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; POWER PLANTS; THERMAL POWER PLANTS; THERMODYNAMIC PROPERTIES; TURBINES; TURBOMACHINERY; WATER; Geothermal Legacy

Citation Formats


                    Khalifa, H E, DiPippo, R, and Kestin, J. Geothermal preheating in fossil-fired steam power plants.  United States: N. p., 1978. 
        Web.  doi:10.2172/6565025.

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                    Khalifa, H E, DiPippo, R, & Kestin, J. Geothermal preheating in fossil-fired steam power plants.  United States.  https://doi.org/10.2172/6565025

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                    Khalifa, H E, DiPippo, R, and Kestin, J. 1978.  
        "Geothermal preheating in fossil-fired steam power plants".  United States.  https://doi.org/10.2172/6565025.  https://www.osti.gov/servlets/purl/6565025.

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@article{osti_6565025,

  title        = {Geothermal preheating in fossil-fired steam power plants},

  author       = {Khalifa, H E and DiPippo, R and Kestin, J},

  abstractNote = {A thermodynamic analysis of a hybrid fossil geothermal power plant in which the low-grade geothermal energy is used for preheating the feedwater in a fossil-fired steam power plant is presented. By restricting the geofluid to sensible heat addition, the entropy production in this process can be reduced. This results in an overall improvement in the utilization of the two energy sources. The performance of the hybrid system is studied in terms of suitably defined figures of merit. These include criteria for the choice of the appropriate hybrid utilization strategy, given the finite nature of geothermal and fossil resources. The question of optimum bleed conditions in a cycle comprising both geothermal and regenerative feedwater heating is discussed.},

  doi          = {10.2172/6565025},

  url          = {https://www.osti.gov/biblio/6565025},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Wed Mar 01 00:00:00 EST 1978},

  month        = {Wed Mar 01 00:00:00 EST 1978}

}

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