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Organic Rankine Cycle Mechanically and Thermally Coupled to an Engine Driving a Common Load

  • US 20090211253A1
  • Filed: 06/16/2006
  • Published: 08/27/2009
  • Est. Priority Date: 06/16/2005
  • Status: Abandoned Application
First Claim
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1. Apparatus, comprising:

  • a load (21);

    an internal combustion engine (19) having a shaft (20) through which it delivers torque to the load, said engine having an air inlet receiving air from a source (51), said engine having exhaust (24) passing through a heat exchanger (25);

    an organic Rankine cycle subsystem including a turbine (28) having a shaft (20, 20a) coupled to said engine shaft and having an organic Rankine cycle working fluid that is vaporized in said heat exchanger;

    characterized by;

    said organic Rankine cycle working fluid being preheated (45-48), before vaporization, by heat extracted from one or more engine fluids of said engine, to thereby cool the engine, said heat exchanger comprising an evaporator (25) for heating the organic Rankine cycle working fluid with engine exhaust (24), said evaporator having a serpentine organic Rankine cycle fluid flow conduit (120) with exhaust pressure pulse reducing fins (121, 122) disposed on said conduit;

    an air conditioning subcycle system having a coolant compressor (107) mechanically coupled to said shaft (20), a coolant condenser (109) receiving coolant flow from said compressor, an expansion valve (113) passing coolant flow from said coolant condenser, and an evaporator (45a) in fluid communication between the expansion valve and the compressor, said evaporator comprising a heat exchanger providing thermal communication between said coolant flow and air flowing from said source to said air inlet;

    turbine bypass valving (81, 82) selectively operable to bypass the organic Rankine cycle working fluid around the turbine; and

    means (81, 82, 84, 89) for controlling organic Rankine cycle working fluid pressure drop across the turbine.

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