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Rankine cycle condenser pressure control using an energy conversion device bypass valve

United States Patent

April 1, 2014
View the Complete Patent at the US Patent & Trademark Office
The disclosure provides a waste heat recovery system and method in which pressure in a Rankine cycle (RC) system of the WHR system is regulated by diverting working fluid from entering an inlet of an energy conversion device of the RC system. In the system, an inlet of a controllable bypass valve is fluidly coupled to a working fluid path upstream of an energy conversion device of the RC system, and an outlet of the bypass valve is fluidly coupled to the working fluid path upstream of the condenser of the RC system such that working fluid passing through the bypass valve bypasses the energy conversion device and increases the pressure in a condenser. A controller determines the temperature and pressure of the working fluid and controls the bypass valve to regulate pressure in the condenser.
Ernst; Timothy C. (Columbus, IN), Nelson; Christopher R. (Columbus, IN), Zigan; James A. (Versailles, IN)
Cummins Intellectual Properties, Inc. (Minneapolis, MN)
13/ 209,398
August 13, 2011
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with government support under "Exhaust Energy Recovery," contract number DE-FC26-05NT42419 awarded by the Department of Energy (DOE). The government has certain rights in the invention.