WASTE HEAT RECOVERY SYSTEM
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United States of America Patent
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Issued Date -
Feb 25, 2016
app pub date -
Mar 20, 2014
filing date -
Mar 25, 2013
priority date (Note) -
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Abstract
A method and apparatus for controlling the mass flow rate of a positive displacement expander comprises pumping a working fluid to a heat exchanger to convert the fluid into a working vapor. At least a portion of the working vapor is stored in an accumulator connected to the heat exchanger. At least a portion of the working vapor stored in the accumulator is selectively released into a positive displacement expander via a pulse width modulated valve to increase the efficiency of the expander.
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