CN113789154B - Ternary mixed working medium containing carbon dioxide and fluoroethane - Google Patents
Ternary mixed working medium containing carbon dioxide and fluoroethane Download PDFInfo
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- CN113789154B CN113789154B CN202111073209.7A CN202111073209A CN113789154B CN 113789154 B CN113789154 B CN 113789154B CN 202111073209 A CN202111073209 A CN 202111073209A CN 113789154 B CN113789154 B CN 113789154B
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
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Abstract
The invention discloses a ternary mixed working medium containing carbon dioxide and fluoroethane, which comprises 30-80% of carbon dioxide and 10-60% of fluoroethane by mass percent. The ternary mixed working medium provided by the invention is suitable for transcritical power cycle, has an ozone depletion potential value ODP of zero, is nonflammable, can not damage an atmospheric ozone layer after long-term use, and has a global warming potential value GWP of less than 150.
Description
Technical Field
The invention relates to the technical field of thermodynamic cycle, in particular to a ternary mixed working medium containing carbon dioxide and fluoroethane.
Background
The greenhouse effect is a great challenge facing countries around the world in this century. To achieve the objectives of "carbon peak, carbon neutralization" it is necessary to control substances that may produce significant greenhouse effects. To solve this problem, china formally accepts the basic addition amendment. Hydrofluorocarbons (HFCs) are currently widely used cyclic working fluids, but such working fluids tend to have a large Global Warming Potential (GWP)>150). To meet the basic calix amendment requirements, there is a need for developing efficient replacement working fluids with zero Ozone Depletion Potential (ODP) and Global Warming Potential (GWP) below 150 for either the power cycle or refrigeration cycle applications. Hydrofluoroolefins (HFOs) are unsaturated organics composed of carbon, hydrogen and fluorine, typically exhibiting zero ODP and very low GWP. However, hydrofluoroolefins tend to have some flammability. Carbon dioxide (CO) 2 ) As a natural working medium, the global warming potential is only 1, and has remarkable flame retarding effect. Fluoroethane (R161) is used as a hydrofluorocarbon working medium, but has a global warming potential of only 12, excellent cycle performance and is one of cycle working media with remarkable application prospect. By using carbon dioxide with flame retardance and excellent cycle performanceThe isofluoroethane and the hydro fluoroolefin with excellent environmental protection performance are mixed according to a certain proportion to form a mixed working medium, the advantages of the three working mediums are utilized to compensate each other, and finally the working medium meeting the power cycle application requirement is formed.
Disclosure of Invention
Accordingly, there is a need for a blend medium that is completely free of ozone layer damage, has a Global Warming Potential (GWP) of less than 150, is nonflammable, and has a high thermal efficiency, in view of the drawbacks of the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a ternary mixed working medium containing carbon dioxide and fluoroethane, comprising: the sum of the mass percent concentration of each component in the ternary mixed working medium is 100%, wherein the mass percent concentration of the carbon dioxide is 30% -80%, and the mass percent concentration of the fluoroethane is 10% -60%. The third component is one of difluoromethane (R32), trifluoroethylene (R1123) and 3, 3-trifluoropropene (R1243 zf).
The ternary mixed working medium comprises carbon dioxide, fluoroethane and difluoromethane, wherein the mass percentage of the carbon dioxide, the fluoroethane and the difluoromethane is 30-80%:10-60%:10-20% global warming potential less than 150.
The ternary mixed working medium comprises carbon dioxide, fluoroethane and trifluoroethylene, wherein the mass percentage of the carbon dioxide, the fluoroethane and the trifluoroethylene is 30-80%:10-60%:10-60% and global warming potential less than 150.
The ternary mixed working medium comprises carbon dioxide, fluoroethane and 3, 3-trifluoropropene, wherein the mass percentage of the carbon dioxide, the fluoroethane and the 3, 3-trifluoropropene is 30-80%:10-60%:10-60% and global warming potential less than 150.
The invention has the advantages that: the ternary mixed working medium provided by the invention comprises 30-80% of carbon dioxide and 10-60% of fluoroethane by mass percent. The ternary mixed working medium provided by the invention is suitable for transcritical power cycle, has an ozone depletion potential value ODP of zero, is nonflammable, can not damage an atmospheric ozone layer after long-term use, and has a global warming potential value GWP of less than 150.
The specific embodiment is as follows:
the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The ternary mixed working medium provided by the invention comprises the following components: the sum of the mass percent concentration of each component in the ternary mixed working medium is 100%, wherein the mass percent concentration of the carbon dioxide is 30% -80%, and the mass percent concentration of the fluoroethane is 10% -60%.
The ternary mixed working medium provided by the invention is suitable for transcritical power cycle, has an ozone depletion potential value ODP of zero, is nonflammable, can not damage an atmospheric ozone layer after long-term use, and has a global warming potential value GWP of less than 150.
The following describes the above technical scheme of the present invention in detail with reference to examples.
Example 1: taking carbon dioxide with the mass percentage concentration of 80%, fluoroethane with the mass percentage concentration of 10%, and difluoromethane with the mass percentage concentration of 10% for physical mixing at normal temperature to obtain the mixed working medium applicable to transcritical power cycle.
Example 2: taking 50% carbon dioxide by mass percent, 30% fluoroethane by mass percent and 20% difluoromethane by mass percent, and physically mixing at normal temperature to obtain the mixed working medium applicable to transcritical power cycle.
Example 3: taking carbon dioxide with the mass percentage concentration of 30%, fluoroethane with the mass percentage concentration of 60%, and difluoromethane with the mass percentage concentration of 10%, and physically mixing at normal temperature to obtain the mixed working medium applicable to transcritical power cycle.
Example 4: taking carbon dioxide with the mass percentage concentration of 80%, fluoroethane with the mass percentage concentration of 10%, and trifluoroethylene with the mass percentage concentration of 10% for physical mixing at normal temperature to obtain the mixed working medium applicable to transcritical power cycle.
Example 5: taking 50% carbon dioxide, 20% fluoroethane and 30% trifluoroethylene, and physically mixing at normal temperature to obtain a mixed working medium applicable to transcritical power cycle.
Example 6: taking carbon dioxide with the mass percentage concentration of 30%, fluoroethane with the mass percentage concentration of 60% and trifluoroethylene with the mass percentage concentration of 10% for physical mixing at normal temperature to obtain the mixed working medium applicable to transcritical power cycle.
Example 7: taking carbon dioxide with the mass percentage concentration of 80%, fluoroethane with the mass percentage concentration of 10%, and 3, 3-trifluoropropene with the mass percentage concentration of 10% for physical mixing at normal temperature to obtain the mixed working medium applicable to transcritical power cycle.
Example 8: taking 50% carbon dioxide by mass percentage, 20% fluoroethane by mass percentage and 30% 3, 3-trifluoropropene by mass percentage, and physically mixing at normal temperature to obtain the mixed working medium applicable to transcritical power cycle.
Example 9: taking carbon dioxide with the mass percentage concentration of 30%, fluoroethane with the mass percentage concentration of 60%, and 3, 3-trifluoropropene with the mass percentage concentration of 10% for physical mixing at normal temperature to obtain the mixed working medium applicable to transcritical power cycle.
Table 1: global warming potential GWP comparison for various embodiments of the invention
When the ternary mixed working medium provided by the invention is applied to transcritical cycle operation, a typical medium-high temperature heat source (exhaust waste heat of an internal combustion engine and industrial waste heat) is used as a design working condition: the inlet pressure of the expander is 12MPa, the inlet temperature is 200 ℃, the isentropic efficiency of the expander is 0.7, the isentropic efficiency of the working medium pump is 0.8, the inlet of the working medium pump is in a saturated liquid state, and the temperature is 25 ℃.
The cyclic thermal efficiency of some examples is shown in table 2 based on the cyclic performance calculation results. Under the same working condition, pure CO 2 The cycle thermal efficiency was only 7.15%, and the examples of the present invention compare to pure CO 2 The circulation heat efficiency is relatively improved by 12-36%. Therefore, according to the above embodiments and the related calculation data, it can be known that the ternary mixed working medium provided by the invention satisfies the global warming potential GWP<150 and safety requirements, the cycle performance is excellent.
Table 2: global warming potential GWP and cyclic thermal efficiency comparison of some examples of the invention
The embodiments of the present invention are merely described in terms of preferred embodiments of the present invention, and are not intended to limit the spirit and scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope of the present invention, and the technical content of the present invention as claimed is fully described in the claims.
Claims (1)
1. A ternary mixed working medium containing carbon dioxide and fluoroethane is characterized in that: the fluorine-containing gas-free water purifier comprises carbon dioxide, fluoroethane and a third component, wherein the third component is one of difluoromethane, trifluoroethylene and 3, 3-trifluoropropene, and the sum of the mass percent concentration of the carbon dioxide, the fluoroethane and the third component is 100%, wherein the mass percent concentration of the carbon dioxide is 30-80%, and the mass percent concentration of the fluoroethane is 10-60%;
when the third component is difluoromethane, the mass percentages of the carbon dioxide, the fluoroethane and the difluoromethane are 30-80%:10-60%:10-20%, wherein the sum of the mass percentages of the components is 100%, and the global warming potential value is less than 150;
when the third component is trifluoroethylene, the mass percentages of the carbon dioxide, the fluoroethane and the trifluoroethylene are 30-80%:10-60%:10-30%, the sum of the mass percentages of the components is 100%, and the global warming potential value is less than 150;
when the third component is 3, 3-trifluoropropene, the mass percentage of the carbon dioxide, the fluoroethane and the 3, 3-trifluoropropene is 30-80 percent: 10-60%:10-30%, the sum of the mass percentages of the components is 100%, and the global warming potential is less than 150.
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| CN109609103A (en) * | 2018-12-30 | 2019-04-12 | 天津大学 | A kind of three constituent element mixed working fluids suitable for afterheat of IC engine recycling power cycle |
| CN109689831A (en) * | 2016-09-07 | 2019-04-26 | Ａｇｃ株式会社 | Working medium for heat cycle, heat circulating system composition and heat circulating system |
| CN110257014A (en) * | 2019-07-19 | 2019-09-20 | 珠海格力电器股份有限公司 | A kind of Mix refrigerant cycle |
| CN111849420A (en) * | 2020-07-20 | 2020-10-30 | 大连理工大学 | Mixed working medium containing monofluoroethane and trifluoroethylene |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3081865B1 (en) * | 2018-06-05 | 2020-11-06 | Arkema France | COMPOSITIONS BASED ON 1,1,2-TRIFLUOROETHYLENE AND CARBON DIOXIDE |
| DE102019105676B4 (en) * | 2019-03-06 | 2021-05-06 | Weiss Umwelttechnik Gmbh | Refrigerant and its use |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109689831A (en) * | 2016-09-07 | 2019-04-26 | Ａｇｃ株式会社 | Working medium for heat cycle, heat circulating system composition and heat circulating system |
| CN109609103A (en) * | 2018-12-30 | 2019-04-12 | 天津大学 | A kind of three constituent element mixed working fluids suitable for afterheat of IC engine recycling power cycle |
| CN110257014A (en) * | 2019-07-19 | 2019-09-20 | 珠海格力电器股份有限公司 | A kind of Mix refrigerant cycle |
| CN111849420A (en) * | 2020-07-20 | 2020-10-30 | 大连理工大学 | Mixed working medium containing monofluoroethane and trifluoroethylene |
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