Waste heat recovery system with constant power output
First Claim
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1. A method for generating power using waste heat from an engine including an exhaust system and an exhaust gas recirculation system comprising the steps of:
- transferring heat energy, using a first heat exchanger, from the exhaust gas recirculation system to a liquid flowing through a conduit defining a loop;
transferring heat energy from the exhaust system to the liquid of the loop;
combining the liquid heated by the exhaust system with the heated liquid flowing from said first heat exchanger at a junction in the loop;
transferring heat energy, using a second heat exchanger positioned downstream of said junction, from the exhaust gas recirculation system to the combined liquid heated by the exhaust system and by the exhaust gas recirculation system; and
generating electrical power with a turbine with the heat energy stored in the liquid of the loop.
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Abstract
A waste heat recovery system for use with an engine. The waste heat recovery system receives heat input from both an exhaust gas recovery system and exhaust gas streams. The system includes a first loop and a second loop. The first loop is configured to receive heat from both the exhaust gas recovery system and the exhaust system as necessary. The second loop receives heat from the first loop and the exhaust gas recovery system. The second loop converts the heat energy into electrical energy through the use of a turbine.
63 Citations
9 Claims
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1. A method for generating power using waste heat from an engine including an exhaust system and an exhaust gas recirculation system comprising the steps of:
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transferring heat energy, using a first heat exchanger, from the exhaust gas recirculation system to a liquid flowing through a conduit defining a loop; transferring heat energy from the exhaust system to the liquid of the loop; combining the liquid heated by the exhaust system with the heated liquid flowing from said first heat exchanger at a junction in the loop; transferring heat energy, using a second heat exchanger positioned downstream of said junction, from the exhaust gas recirculation system to the combined liquid heated by the exhaust system and by the exhaust gas recirculation system; and generating electrical power with a turbine with the heat energy stored in the liquid of the loop. - View Dependent Claims (2, 3, 4, 5)
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6. A system configured to produce electricity from waste heat produced by an engine including:
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an exhaust gas recirculation system; and an exhaust system; a loop including a conduit, fluid flowing through the conduit, a turbine, a first heat exchanger to transfer heat energy from the exhaust gas recirculation system into the fluid, a second heat exchanger positioned downstream of said first heat exchanger to transfer heat energy from the exhaust gas recirculation system to the fluid in the loop, a third heat exchanger adapted to transfer heat from the exhaust system into the fluid, a junction positioned upstream of said second heat exchanger and downstream of said first heat exchanger to combine heated fluid flowing from said third heat exchanger with fluid flowing from said first heat exchanger prior to flowing into said second heat exchanger. - View Dependent Claims (7, 8, 9)
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Specification