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US 6,928,820 B2Granted
Waste heat collecting system having rankine cycle and heating cycle
AssigneesDenso Corporation, Nippon Soken, Inc.
InventorsAtsushi Inaba, Shinichi Hamada, Shigeru Hisanaga, Tadashi Hotta
Life of this patent
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Abstract
An object of the invention is to provide a rankine cycle suitable for a use for a motor vehicle. In a waste heat collecting system having the rankine cycle and a refrigerating cycle, when ECU receives an air-conditioning signal from A/C ECU, the refrigerating cycle is operated, by preceding the operation of the rankine cycle. In the case that there is no air-conditioning signal and a temperature of an engine cooling water is higher than a predetermined value, the rankine cycle is operated.
Claims6
A waste heat collecting system having a rankine cycle comprising:
- a vapor generating device for generating a superheated vapor by heating a liquid-phase fluid with a waste heat from a thermal engine;
- an expansion device for generating a kinetic energy by expanding the superheated vapor in an isenthropic manner;
- a condensing device for condensing the vapor expanded in the expansion device to convert the vapor into the liquid-phase fluid;
- a liquid pump for pumping the liquid-phase fluid to the vapor generating device;
- and
- an adjusting means for adjusting an amount of the waste heat to be supplied to the vapor generating device from the thermal engine, so that the supply of the superheated vapor from the vapor generating device to the expansion device is correspondingly controlled, wherein
- the adjusting means supplies the waste heat from the thermal engine to the vapor generating device when a temperature (Tw) of the waste heat is higher than a predetermined value, and stops the supply of the waste heat from the thermal engine to the vapor generating device when the temperature (Tw) of the waste heat is lower than the predetermined value.
4 more elements
Dependencies are inferred from the claim text.