Working fluid for rankine cycle power plant
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United States of America Patent
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Oct 31, 1989
Grant Date -
N/A
app pub date -
Jan 8, 1986
filing date -
Jan 8, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A composite working fluid for a Rankine cycle power plant operating between a boiler temperature and a condenser temperature comprises a mixture of immiscible fluids selected such that the saturated vapor line of the composite fluid in the vicinity of the boiler temperature is generally along a line of substantially constant entropy. As a result, the vapor of the composite working fluid expands from boiler to condenser temperature generally along the saturated vapor line of the composite working fluid. One of the immiscible fluids of the composite working fluid is a 'wet' fluid, and one of the immiscible fluids is a 'dry' fluid. The 'wet' fluid is a polar compound with a molecular weight smaller than the molecular weight of the 'dry' fluid, which is a non-polar compound. Preferably, the 'wet' fluid is water, and the 'dry' fluid is selected from a class comprising hydrocarbons and their halogenated derivatives.
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