Waste heat utilization device for internal combustion engine
First Claim
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1. A waste heat utilization device recovering waste heat produced by an internal combustion engine from a heat medium, the device comprising:
- a Rankine cycle circuit including an evaporator, an expander, a condenser and a pump serially arranged in a circulation line for circulation of a combustible working fluid wherein, during operation, the evaporator transfers heat from the heat medium to the working fluid, the expander expands the working fluid passing through the evaporator to produce drive power, the condenser condenses the working fluid passing through the expander, and the pump forces the working fluid passing through the condenser toward the evaporator,a casing to air-tightly enclose the Rankine cycle circuit, chemically inactivating the Rankine cycle circuit;
a first cooling water circuit for circulation of cooling water through the evaporator after passing through the internal combustion engine;
a second cooling water circuit including a radiator outside the casing to cool the cooling water with outside air, for circulation of the cooling water through the condenser after passing through the radiator;
a third cooling water circuit for circulation of cooling water through the radiator after passing through the internal combustion engine; and
a failure coping device comprising;
a sensor to detect a failure of the Rankine cycle circuit; and
an electronic control unit configured to cope with a failure when a failure is detected by the detecting section by issuing a warning to outside of the casing and by stopping the driving of the pump.
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Abstract
A waste heat utilization device recovering waste heat produced by an internal combustion engine from a heat medium includes a Rankine cycle circuit including an evaporator, an expander, a condenser and a pump serially arranged in a circulation line along which a combustible working fluid circulates. A casing air-tightly encloses the Rankine cycle circuit to chemically inactivate the Rankine cycle circuit.
18 Citations
12 Claims
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1. A waste heat utilization device recovering waste heat produced by an internal combustion engine from a heat medium, the device comprising:
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a Rankine cycle circuit including an evaporator, an expander, a condenser and a pump serially arranged in a circulation line for circulation of a combustible working fluid wherein, during operation, the evaporator transfers heat from the heat medium to the working fluid, the expander expands the working fluid passing through the evaporator to produce drive power, the condenser condenses the working fluid passing through the expander, and the pump forces the working fluid passing through the condenser toward the evaporator, a casing to air-tightly enclose the Rankine cycle circuit, chemically inactivating the Rankine cycle circuit; a first cooling water circuit for circulation of cooling water through the evaporator after passing through the internal combustion engine; a second cooling water circuit including a radiator outside the casing to cool the cooling water with outside air, for circulation of the cooling water through the condenser after passing through the radiator; a third cooling water circuit for circulation of cooling water through the radiator after passing through the internal combustion engine; and a failure coping device comprising; a sensor to detect a failure of the Rankine cycle circuit; and an electronic control unit configured to cope with a failure when a failure is detected by the detecting section by issuing a warning to outside of the casing and by stopping the driving of the pump. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. The waste heat utilization device recovering waste heat produced by an internal combustion engine from a heat medium, the device comprising:
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a Rankine cycle circuit including an evaporator, an expander, a condenser and a pump serially arranged in a circulation line for circulation of a combustible working fluid wherein, during operation, the evaporator transfers heat from the heat medium to the working fluid, the expander expands the working fluid passing through the evaporator to produce drive power, the condenser condenses the working fluid passing through the expander, and the pump forces the working fluid passing through the condenser toward the evaporator; a casing to air-tightly enclose the Rankine cycle circuit, chemically inactivating the Rankine cycle circuit; a first cooling water circuit for circulation of cooling water through the evaporator after passing through the internal combustion engine; a second cooling water circuit including a radiator outside the casing to cool the cooling water with outside air, for circulation of the cooling water through the condenser after passing through the radiator; a third cooling water circuit for circulation of cooling water through the radiator after passing through the internal combustion engine; an electrical power detector to detect the electrical power generated by the electrical generator; a flow distribution valve to distribute the flow of cooling water to the first and third cooling water circuits after passing through the internal combustion engine, wherein, when the electrical power detected by the electrical power detector is greater than or equal to a preset value, the flow distribution valve is configured to increase the flow of cooling water passing through the internal combustion engine and entering the third cooling water circuit. - View Dependent Claims (12)
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Specification