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Optimum Flashing Pressure in Single and Double Flash Geothermal Power Plants

[+] Author Affiliations
Shahin Amiri, Hossein Shokouhmand, Ahmad Kahrobaian

University of Tehran, Tehran, Iran

Shayan Amiri

Khaje Nasir Toosi University of Technology, Tehran, Iran

Paper No. HT2008-56234, pp. 125-129; 5 pages
doi:10.1115/HT2008-56234
From:
  • ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
  • Heat Transfer: Volume 1
  • Jacksonville, Florida, USA, August 10–14, 2008
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4847-0 | eISBN: 0-7918-3832-3
  • Copyright © 2008 by ASME

abstract

In this paper an analytical investigation has been reported on determination of the optimum flashing pressures to get maximum efficiency in flash geothermal power plants. Also, two different views on efficiency have been considered; thermal efficiency and exergy efficiency. Both views anticipate very close optimum flashing pressure and in this pressure, exergy efficiency is between 3 to 5.5 times more than thermal efficiency. It is observed that the optimum flashing pressure in a single flash power plant is between the optimum flashing pressures of two separators in a double flash power plant. Also both views predict an increase of 20–29 percent for the efficiency of double flash power plants than the efficiency of single flash power plants.

Copyright © 2008 by ASME

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