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Organic Rankine cycle mixed working medium containing toluene

A technology of mixed working fluid and Rankine cycle, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of low engine exhaust pressure, limitation of absorption refrigeration application, poor energy utilization effect, etc., to protect the ozone layer , reduce the greenhouse effect, and have excellent environmental characteristics

Inactive Publication Date: 2013-04-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The exhaust pressure of the engine is low and the temperature is high, and the energy utilization effect of direct expansion work is poor, so the application of absorption refrigeration is limited

Method used

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  • Organic Rankine cycle mixed working medium containing toluene
  • Organic Rankine cycle mixed working medium containing toluene
  • Organic Rankine cycle mixed working medium containing toluene

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0019] Embodiment 1: take 80 mass % (C 7 h 8 ) and 20 mass %R141b is used as a circulating working fluid after physical mixing at room temperature.

Embodiment 2

[0020] Embodiment 2: take 60 mass % (C 7 h 8 ) and 40 mass %R141b is used as a circulating working fluid after physical mixing at room temperature.

Embodiment 3

[0021] Embodiment 3: take 40 mass % (C 7 h 8 ) and 60 mass %R141b is used as a circulating working fluid after physical mixing at room temperature.

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Abstract

The invention discloses an organic Rankine cycle mixed working medium containing toluene, which is applied to an engine waste heat system. The working medium is a two-component mixture composed of toluene and dichloro-fluoroethane in different mass percentages, and is suitable for being used as a working medium of a high-temperature ORC system in which the temperature of a heat source is 400 DEG C to 700 DEG C. The preparation method is as follows: performing physical mixing on the components according to designated matching at normal temperature, so as to obtain the corresponding mixed working medium. The ODP of the working medium is almost zero and the GWP is lower. The working medium has a good environmental property, conforms to the requirements for protecting the ozone layer and reducing the greenhouse effect, and can be directly applied to the high-temperature exhaust waste heat ORC system of an engine.

Description

technical field [0001] The invention belongs to a thermodynamic cycle working medium, in particular to a circulating working medium used in an internal combustion engine exhaust waste heat recovery system. Background technique [0002] The exhaust pressure of the engine is low, the temperature is high, and the energy utilization effect of direct expansion work is poor, so the application of absorption refrigeration is limited. At present, the use of Organic Rankine Cycle (ORC) to recover waste heat from internal combustion engines has become a research hotspot. Using Organic Rankine Cycle for waste heat recovery, the choice of working fluid will become the key. For the heat exchanger, the available energy loss is mainly the temperature difference heat transfer, that is, the average temperature difference between the working fluid side temperature and the heat and cold source. For the subcritical saturated cycle, the pure working fluid evaporates isothermally, while the mixe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04
Inventor 田华高媛媛舒歌群卫海桥梁兴雨
Owner TIANJIN UNIV
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