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Organic Rankine circulation (ORC) mixed working medium containing HFE-143(CH2FOCHF2)

A CH2FOCHF2, mixed working fluid technology, applied in the direction of heat exchange materials, chemical instruments and methods, can solve the problems of flammable and explosive, poor economy, large greenhouse effect, etc., and achieve excellent environmental characteristics and cycle performance. Effect

Inactive Publication Date: 2009-12-09
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the main reasons why low-temperature resources are less economical for power generation and utilization is the lack of suitable circulating working fluids
The working fluid currently used as a low-temperature organic Rankine cycle is C 5 f 12 , HC600, etc., they either have a large greenhouse effect (GWP), or are flammable and explosive, which limits their popularization and application

Method used

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  • Organic Rankine circulation (ORC) mixed working medium containing HFE-143(CH2FOCHF2)
  • Organic Rankine circulation (ORC) mixed working medium containing HFE-143(CH2FOCHF2)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: get 26.2 mass %HFE-143 and 73.8 mass %HFC-236ea, used as a refrigerant after physical mixing at room temperature.

Embodiment 2

[0031] Embodiment 2: take 15 mass %HFE-143, 56 mass %HFC-236ea and 29 mass %HFC-245ca, used as a refrigerant after physical mixing at room temperature.

Embodiment 3

[0032] Embodiment 3: get 42.7 mass %HFE-143 and 57.3 mass %HFC-245fa, used as a refrigerant after physical mixing at room temperature.

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PUM

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Abstract

The invention discloses an organic Rankine circulation (ORC) mixed working medium containing HFE-143(CH2FOCHF2), being suitable to serve as a refrigerating fluid for the low-temperature ORC system with the evaporating temperature being 60-100 DEG C. The mixed working medium is binary mixture or tertiary mixture composed of seven components according to different mass ratios: HFE-143, HFC-143, HFC-236ea, HFC-236fa, HFC-245ca, HFC-245fa and HFC-254cb.The preparation method of the invention is that the above components are physically mixed according to specified proportioning at normal temperature to obtain the corresponding mixed working medium. The working medium of the invention does not destroy the ozone layer, has smaller green house effect, is suitable for environment protection requirements, and has suitable thermal parameter and favourable cycle performance. Under design working condition, the ORC efficiency is 9.2%, and unit mass output net work is mainly above 23kJ / kg.

Description

technical field [0001] The invention belongs to a refrigerant in a heat pump or an air-conditioning system, and in particular relates to a working medium in a low-temperature organic Rankine cycle system with an evaporation temperature of 60-100°C. Background technique [0002] Research on low-temperature resources (such as low-temperature geothermal energy, waste heat or solar energy) power generation technology is helpful for reducing fossil energy consumption and CO 2 , SO 2 , NO x It is of great significance to achieve sustainable development by reducing the emission of greenhouse gases and environmental pollutants. One of the main technical factors restricting the utilization of low temperature resources for power generation is the system economy. The practice of medium-temperature resource power generation technology shows that the power generation technology based on organic Rankine cycle is more economical. [0003] In recent years, with the increasing challenges...

Claims

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Application Information

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IPC IPC(8): C09K5/04
Inventor 王怀信郭涛张圣君储静娴
Owner TIANJIN UNIV
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