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Closed circuit operating according to a rankine cycle and method using same

Inactive Publication Date: 2011-10-27
INST FR DU PETROLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The major drawback of this device is that a great temperature difference is required for this conversion to be achieved.
The temperature and the pressure of the water vapour at the condenser inlet therefore have to be raised, but to the detriment of the efficiency of the steam turbine this power plant is provided with.

Method used

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  • Closed circuit operating according to a rankine cycle and method using same
  • Closed circuit operating according to a rankine cycle and method using same

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Embodiment Construction

[0020]In the sole FIGURE, Rankine cycle closed circuit 10 comprises a circulation and compression means 12 for a working fluid, water here, circulating clockwise (arrows A) in this circuit. This means, referred to as compressor in the rest of the description, allows to compress this water between an inlet 14 and an outlet 16 where this water, still in liquid form, is at high pressure.

[0021]This compressor is advantageously driven in rotation by any known means such as an electric motor 18.

[0022]This circuit also comprises a heat exchanger 20, referred to as evaporator, traversed by the compressed water that flows out in form of compressed vapour.

[0023]This evaporator is swept by a hot source 22 coming from the exhaust gas circulating in exhaust line 24 of an internal-combustion engine 26.

[0024]Advantageously, this engine is an internal-combustion engine of a motor vehicle.

[0025]This circuit also comprises an expansion machine 28, or expander, receiving at the intake thereof the high...

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Abstract

The present invention relates to a closed circuit operating according to a Rankine cycle, comprising a circulation and compression pump (12) for a working fluid in liquid form, a heat exchanger (20) swept by a hot source (22) for evaporation of said fluid, expansion means (28) for expanding the fluid in vapour form and a cooling exchanger (32) for condensation of this fluid, traversed by a cooling fluid between an inlet face (38) and an outlet face (40).According to the invention, this circuit comprises thermopiles (44) for capturing and converting (42) the calorific energy coming from cooling exchanger (32) to electric energy and said thermopiles are arranged in the heated cooling fluid stream coming from outlet face (40) of the cooling exchanger.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a closed circuit operating according to a Rankine cycle.[0002]It more particularly relates to such a circuit with a device allowing the calorific energy coming from this circuit to be recovered and converted to another energy.[0003]As it is well known, a Rankine cycle is a closed-circuit thermodynamic cycle whose specific feature is to involve a (liquid / vapour) phase change of a working fluid.[0004]This cycle is generally broken down into a stage wherein the working fluid used, generally water in liquid form, is compressed in an isentropic manner, followed by a stage where this compressed liquid water is heated and vaporized on contact with a source of heat. This water vapour is then expanded, in another stage, in an isentropic manner in an expansion machine, then, in a last stage, this expanded vapour is cooled and condensed on contact with a cold source.[0005]To carry out these various stages, the circuit comprises a com...

Claims

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Application Information

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IPC IPC(8): F01K13/00F01K23/06
CPCF01K15/00Y02T10/16F01N2240/02F01N5/02Y02T10/12
Inventor TERNEL, CYPRIEN
Owner INST FR DU PETROLE
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