Organic Rankine cycle mixed working medium
A Rankine cycle, mixed working fluid technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve problems such as high GWP value, and achieve good environmental performance, good temperature matching, and low GWP effects.
Inactive Publication Date: 2014-07-23
XI AN JIAOTONG UNIV +1
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Problems solved by technology
The mixed working medium in the above patent application is either flammable or has a high GWP value
Method used
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Embodiment 1
[0031] Example 1: In terms of mass percentage, 96% of HCFO-1233zd(E) and 4% of HFO-1234yf were used as circulating mixed working fluid after physical mixing at room temperature.
Embodiment 2
[0032] Example 2: In terms of mass percentage, 98% of HCFO-1233zd(E) and 2% of HFO-1234yf were used as circulating mixed working fluid after physical mixing at room temperature.
Embodiment 3
[0033] Example 3: In terms of mass percentage, 90% of HCFO-1233zd(E) and 10% of HFO-1234ze(E) were physically mixed at room temperature as a circulating mixed working medium.
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The invention discloses an organic Rankine cycle mixed working medium. The organic Rankine cycle mixed working medium comprises the following components by mass percentage: 70-98% of trans-1-chloro-3, 3, 3-trifluoropropene and 2-30% of second component, wherein the second component is one or two of 2, 3, 3, 3-tetrafluoropropene and trans-1, 3, 3, 3-tetrafluoropropene. The mixed working medium disclosed by the invention is incombustible, the ODP (ozone depletion potential) is close to zero, and the GWP (global warming potential) is very low, so that the mixed working medium is in line with environment-friendly requirements; and thermal parameters are appropriate and the cycle performance is excellent. Under the corresponding working conditions, the cycle efficiency is 8.7-10.9%, and the net power output per unit mass is 13.6-26.0kJ / kg.
Description
technical field [0001] The invention belongs to the technical field of thermal system working medium, and in particular relates to an organic Rankine cycle mixed working medium. Background technique [0002] The organic Rankine cycle is a closed cycle system in which organic working fluid replaces water vapor. It has attracted more and more attention because it can convert low-grade energy (such as industrial waste heat, geothermal energy, solar energy, biomass energy, etc.) into electrical energy. , however, due to the lack of ideal working fluid, the development of organic Rankine cycle is restricted to some extent. [0003] HCFC-123 is currently the most studied organic Rankine cycle working fluid. It can achieve high efficiency in the utilization of medium and low temperature waste heat. However, its atmospheric life is long and it has a destructive effect on the ozone layer. Its GWP value is 120; HFC -134a, HFC-245fa and pentane are the three most used working fluids i...
Claims
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Inventor 张可赵康毕胜山吴江涛
Owner XI AN JIAOTONG UNIV