Waste heat recovery system with constant power output
AssigneeCummins Inc.
InventorsTimothy C. Ernst, Christopher R. Nelson
Life of this patent
Estimating the term…
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.
Claims11
A heat recovery system for an engine including an exhaust and an exhaust gas recovery system, the heat recovery system including:
- a first loop including fluid, a conduit, a first heat exchanger, a second heat exchanger and a valve wherein the fluid flows through the conduit, the first heat exchanger conducts heat energy between the fluid and the exhaust gas recovery system and the second heat exchanger conducts heat energy between the fluid and the exhaust and the valve is configured to control the amount of fluid passing through the second heat exchanger;
- a second loop including a third heat exchanger, a fluid, a conduit and a heat conversion device, wherein the fluid flows through the conduit, the third heat exchanger transfers heat from the exhaust gas recovery system to the fluid, and the heat conversion device converts heat from the fluid;
- and
- a fourth heat exchanger transfers heat from the first loop to the second loop.
A heat recovery system for use with a diesel engine including an exhaust system and an exhaust gas recovery system configured for use in at least a high flow state and a low flow state, the heat recovery system including:
- a first loop including a fluid, an outer loop portion, an inner loop portion, a first heat exchanger, a second heat exchanger and a valve, wherein:
- the outer loop portion includes the first heat exchanger thermally connected to the exhaust gas recovery system;
- the inner loop portion includes the second heat exchanger thermally connected to the exhaust system;
- and
- the valve connects the inner loop portion to the outer loop portion;
- a second loop including a fluid, a heat conversion device configured to convert heat energy in the fluid and a third heat exchanger thermally connected to the exhaust gas recovery system;
- and
- a fourth heat exchanger thermally connecting the first loop to the second loop.
Dependencies are inferred from the claim text.