Waste heat utilization device and control method thereof
First Claim
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1. A waste heat utilization device comprising:
- a Rankine cycle in which an operation fluid circulates, the Rankine cycle including;
a heater for heating the operation fluid using a waste fluid with a waste heat from a heat engine;
an expander that expands the heated operation fluid to recover a mechanical energy; and
a condenser for cooling and condensing the expanded operation fluid; and
a control unit which controls an operation of the Rankine cycle, wherein;
the control unit operates the Rankine cycle when a waste fluid temperature is not less than a predetermined temperature and when the waste fluid is in a flowing state in the heat engine.
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Abstract
A waste heat utilization device includes a Rankine cycle in which an operation fluid circulates, and a control unit which controls an operation of the Rankine cycle. The Rankine cycle has a heater for heating the operation fluid using a waste fluid with a waste heat from a heat engine, an expander that expands the heated operation fluid to recover a mechanical energy, and a condenser for cooling and condensing the expanded operation fluid. The control unit operates the Rankine cycle when a waste fluid temperature is not less than a predetermined temperature and when the waste fluid is in a flowing state in the heat engine.
53 Citations
36 Claims
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1. A waste heat utilization device comprising:
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a Rankine cycle in which an operation fluid circulates, the Rankine cycle including; a heater for heating the operation fluid using a waste fluid with a waste heat from a heat engine; an expander that expands the heated operation fluid to recover a mechanical energy; and a condenser for cooling and condensing the expanded operation fluid; and a control unit which controls an operation of the Rankine cycle, wherein; the control unit operates the Rankine cycle when a waste fluid temperature is not less than a predetermined temperature and when the waste fluid is in a flowing state in the heat engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A control method of a waste heat utilization device that comprises a Rankine cycle which heats an operation fluid in the Rankine cycle by a heater using a waste fluid with a waste heat from a heat engine, expands the heated operation fluid by an expander for recovering a mechanical energy, and cools and condenses the expanded operation fluid by a condenser, the method comprising:
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determining whether a waste fluid temperature is not less than a predetermined temperature; determining whether the waste fluid is in a flowing state; and operating the Rankine cycle when the waste fluid temperature is not less than the predetermined temperature and the waste fluid is in the flowing state. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification