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Operating a sub-sea organic Rankine cycle (ORC) system using individual pressure vessels

  • US 8,375,716 B2
  • Filed: 12/21/2007
  • Issued: 02/19/2013
  • Est. Priority Date: 12/21/2007
  • Status: Expired due to Fees
First Claim
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1. An organic Rankine cycle (ORC) system for generating electrical power using a sub-sea geothermal source from a sea, the ORC system comprising:

  • a first pressure vessel containing an evaporator configured to receive heat from the sub-sea geothermal source and vaporize an organic fluid passing through the first pressure vessel;

    a second pressure vessel removably connected to the first pressure vessel and containing a turbine configured to receive the organic fluid and expand the fluid to produce mechanical shaft energy convertible to electrical power;

    a third pressure vessel removably connected to the second pressure vessel and containing a condenser configured to condense the vaporized organic fluid flowing from the second pressure vessel and reject heat to cold sea water; and

    a fourth pressure vessel removably connected to the third pressure vessel and the first pressure vessel, and containing a pump configured to increase a pressure of the condensed organic fluid and recycle the organic fluid to the first pressure vessel.

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