Advanced binary geothermal power plants working fluid property determination and heat exchanger design

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The performance of binary geothermal power plants can be improved through the proper choice of a working fluid, and optimization of component designs and operating conditions. This paper reviews the investigations at the Idaho National Engineering Laboratory (INEL) which are examining binary cycle performance improvements for moderate temperature (350 to 400 F) resources with emphasis on how the improvements may be integrated into design of binary cycles. These investigations are examining performance improvements resulting from the supercritical vaporization of mixed hydrocarbon working fluids and achieving countercurrent integral condensation with these fluids, as well as the modification of the turbine inlet ... continued below

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Medium: P; Size: Pages: 8

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Bliem, C.J. & Mines, G.L. January 1, 1989.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

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  • EG & G Idaho
    Publisher Info: EG and G Idaho, Inc., Idaho Falls (USA)
    Place of Publication: Idaho Falls, Idaho

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Description

The performance of binary geothermal power plants can be improved through the proper choice of a working fluid, and optimization of component designs and operating conditions. This paper reviews the investigations at the Idaho National Engineering Laboratory (INEL) which are examining binary cycle performance improvements for moderate temperature (350 to 400 F) resources with emphasis on how the improvements may be integrated into design of binary cycles. These investigations are examining performance improvements resulting from the supercritical vaporization of mixed hydrocarbon working fluids and achieving countercurrent integral condensation with these fluids, as well as the modification of the turbine inlet state points to achieve supersaturated turbine vapor expansions. For resources where the brine outlet temperature is restricted, the use of turbine exhaust recuperators is examined. The baseline plant used to determine improvements in plant performance (characterized by the increase in the net brine effectiveness, watt-hours per pound of brine) in these studies operates at conditions similar to the 45 MW Heber binary plant. Through the selection of the optimum working fluids and operating conditions, achieving countercurrent integral condensation, and allowing supersaturated vapor expansions in the turbine, the performance of the binary cycle (the net brine effectiveness) can be improved by 25 to 30% relative to the baseline plant. 15 refs., 7 figs.

Physical Description

Medium: P; Size: Pages: 8

Notes

NTIS, PC A02/MF A01 - OSTI; 1.

Source

  • US Department of Energy research and development for the geothermal marketplace: 7th geothermal program review, San Francisco, CA, USA, 21 Mar 1989

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  • Other: DE89011144
  • Report No.: EGG-M-89092
  • Report No.: CONF-890352-5
  • Grant Number: AC07-76ID01570
  • Office of Scientific & Technical Information Report Number: 6303098
  • Archival Resource Key: ark:/67531/metadc1112234

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 1989

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • June 1, 2018, 4:04 p.m.

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Bliem, C.J. & Mines, G.L. Advanced binary geothermal power plants working fluid property determination and heat exchanger design, article, January 1, 1989; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc1112234/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.