CN101225292A - Mixed refrigerant adapted for refrigerating temperature range of minus 105 degree centigrade to minus 125 degree centigrade - Google Patents
Mixed refrigerant adapted for refrigerating temperature range of minus 105 degree centigrade to minus 125 degree centigrade Download PDFInfo
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- CN101225292A CN101225292A CN 200710304784 CN200710304784A CN101225292A CN 101225292 A CN101225292 A CN 101225292A CN 200710304784 CN200710304784 CN 200710304784 CN 200710304784 A CN200710304784 A CN 200710304784A CN 101225292 A CN101225292 A CN 101225292A
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Abstract
The invention provides a mixed refrigerant suitable for the freezing zone at 105 to 125 DEG C below zero. The carbon tetrafluoride (R14) is mixed with one or two of the ethane (R170) and the ethylene (R1150) and then the mixed refrigerant can be obtained after physically mixing. The above components are physically mixed according to a set matching at normal temperature and the corresponding mixed working substance can be obtained. The ODP is zero, greenly and environment-friendlily, and the mineral lubricating oil of compressor can be well inter-dissolved with the mixed refrigerant. The mixed refrigerant suitable for the freezing zone at 90 to 100 below zero DEG C can flow the capillary and the expansion valve throttling gear well without oil solidification and wax plugging, and is suitable for the low temperature third grade of three-grade cascade refrigeration system and can form 105 to 125 DEG Cbelow zero low temperature.
Description
Technical field
The invention belongs to field of refrigeration, relate to a kind of refrigeration agent, particularly a kind of mix refrigerant that is applicable to-105 ℃～-125 ℃ refrigeration warm areas.
Background technology
In modern Refrigeration Technique, realize-70 ℃～-95 ℃ low temperature by two-stage multiplex refrigerating, but will be implemented in-100 ℃～-130 ℃ interval refrigeration temperatures, then need by three grades of cascade refrigeration modes.The ultimate principle of three grades of overlappings is to utilize a high temperature level refrigeration system, the condenser of temperature level refrigeration system during its vaporizer is used for cooling off, with the condensing pressure of temperature level in realizing reach reasonable levels (1.0～1.5MPa), thus obtain lower refrigeration temperature.Equally, middle its vaporizer of temperature level is used for cooling off the condenser of low temperature level refrigeration system, reaches reasonable levels (1.0～1.5MPa) with the condensing pressure of realizing the low temperature level.Wherein each level all is independently refrigeration cycle.Usually first step high temperature level generally adopts refrigeration agents such as Tetrafluoroethane, difluorochloromethane, propane, and a standard atmosphere is depressed its vaporization temperature between-25～-45 ℃.The temperature level adopts standard atmospheres such as trifluoromethane, ethane to depress the refrigeration agent of vaporization temperature between-78 ℃～-90 ℃ usually in the second stage, third stage low temperature level adopts tetrafluoro-methane (R14), and standard atmosphere is depressed vaporization temperature and is-128 ℃ refrigeration agent.
If only use tetrafluoro-methane R14 material in third stage low temperature level, refrigeration system then is difficult to realize normal refrigeration cycle.Mainly be can not well mix because of R14 under low-temperature condition and compressor oil, thereby cause kapillary, expansion valve to stop up because solidify under the compressor oil low temperature, whole refrigeration cycle can't realize.It is unpractical wanting to come the realization system not have oil fully by oil separator.
Summary of the invention
The objective of the invention is to be to provide a kind of and be applicable to the mix refrigerant of-105 ℃～-125 ℃ refrigeration warm areas, carry out physical mixed at normal temperatures by in tetrafluoro-methane (R14) and ethane (R170), the ethene (R1150) one or both, just can obtain corresponding mixing medium.Use the condenser system temperature of this refrigeration agent to reach-105 ℃～-125 ℃, and have good mutual solubility with lubricating oil at low temperatures, and ODP is zero, be issued to environmental requirement in the prerequisite that guarantees user's economic benefit.
The present invention is a kind of be applicable to-105 ℃～-125 ℃ the refrigeration warm areas mix refrigerant, this refrigeration agent is mixed with one or both in ethane, the ethene in tetrafluoro-methane, these components carry out physical mixed at normal temperatures by its corresponding mixture ratio, get final product this low-temperature mixed refrigeration agent.
This refrigeration agent contains the ethene by mole densitometer 5%～60%, 5%～60% ethane, 40%～90% tetrafluoro-methane.
This refrigeration agent contains the ethene by mole densitometer 10%～60%, 40%～90% tetrafluoro-methane.
This refrigeration agent contains the ethane by mole densitometer 10%～60%, 40%～90% tetrafluoro-methane.
The present invention is a kind of be applicable to-105 ℃～-125 ℃ the refrigeration warm areas mix refrigerant, have following advantage:
1, compliance with environmental protection requirements: the ODP of very low temperature mix refrigerant of the present invention (ozone layer destroying coefficient) equals 0, and GWP is lower, meets in the relevant environmental protection standard to protect ozonosphere, reduces the requirement of Greenhouse effect.
2, the low temperature current downflow is good: ethane, ethene both and mineral based lubricating oil have good mutual solubility, after being mixed in proportion with tetrafluoro-methane, flow through kapillary, expansion valve throttling device under the low temperature and can not occur that oil solidifies and the paraffin blockage phenomenon.
3, owing to the normal boiling point temperature of ethane, ethene and tetrafluoro-methane, use in the third stage low temperature level of suitable fully three grades of cascade refrigeration systems of temperature between-105 ℃～-125 ℃ of refrigeration agent.
Description of drawings
Fig. 1 is for using that the present invention is a kind of and be applicable to the setting drawing of the mix refrigerant of-105 ℃～-125 ℃ refrigeration warm areas.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The present invention is a kind of to be applicable to the mix refrigerant of-105 ℃～-125 ℃ refrigeration warm areas, is carried out under gaseous state by its corresponding mixture ratio by each component that physics is canned to be made.As shown in Figure 1, the present invention is a kind of is applicable to that the device of the mix refrigerant of-105 ℃～-125 ℃ refrigeration warm areas adopts three grades of cascade refrigeration modes, is applicable to third stage low temperature level wherein.Wherein the compression ratio of three compressors is below 12.The high temperature level adopts safe health CAJ2464L power 1.5P compressor, and difluorochloromethane is a refrigeration agent, and its vaporization temperature is-40.8 ℃; Middle temperature level adopts safe health CAJ2446L power 1P compressor, and R508B is a refrigeration agent, and its vaporization temperature is-87.4 ℃; The low temperature level adopts DANFOSS SC21B power 3/4P compressor, and refrigeration agent is a refrigeration agent of the present invention; Load is the stainless steel cask of 700 millimeters of diameter 350 millimeters deep, the copper tube that the outer repeater diameter of bucket is 10 millimeters, 30 millimeters of spacings, 100 millimeters of bucket external thermal insulations.
Wherein, the basic parameter of each component is as shown in table 1:
The basic parameter of table 1 tetrafluoro-methane, ethane, ethene
Move after two hours, temperature reaches stable in the bucket, and the temperature after the third stage low temperature level condensation of refrigerant is-85 ℃, and the back pressure of third stage low temperature level is a standard atmospheric pressure, records third stage low temperature level condensing pressure and vaporization temperature.
Case study on implementation 1: get 60mol% ethane, 40mol% tetrafluoro-methane, at normal temperatures behind the physics uniform mixing as refrigeration agent.Its condensing pressure is 0.95Mpa, and vaporization temperature is-105.2 ℃.
Case study on implementation 2: get 40mol% ethane, 60mol% tetrafluoro-methane, at normal temperatures behind the physics uniform mixing as refrigeration agent.Its condensing pressure is 1.01Mpa, and vaporization temperature is-111.6 ℃.
Case study on implementation 3: get 10mol% ethane, 90mol% tetrafluoro-methane, at normal temperatures behind the physics uniform mixing as refrigeration agent.Its condensing pressure is 1.10Mpa, and vaporization temperature is-123.5 ℃.
Case study on implementation 4: get 60mol% ethene, 40mol% tetrafluoro-methane, at normal temperatures behind the physics uniform mixing as refrigeration agent.Its condensing pressure is 1.05Mpa, and vaporization temperature is-112.8 ℃.
Case study on implementation 5: get 40mol% ethene, 60mol% tetrafluoro-methane, at normal temperatures behind the physics uniform mixing as refrigeration agent.Its condensing pressure is 1.08Mpa, and vaporization temperature is-117.8 ℃.
Case study on implementation 6: get 10mol% ethene, 90mol% tetrafluoro-methane, at normal temperatures behind the physics uniform mixing as refrigeration agent.Its condensing pressure is 1.15Mpa, and vaporization temperature is-125.3 ℃.
Case study on implementation 7: get 5mol% ethane, 5mol% ethene, 90% tetrafluoro-methane, at normal temperatures behind the physics uniform mixing as refrigeration agent.Its condensing pressure is 1.13Mpa, and vaporization temperature is-124.6 ℃.
Case study on implementation 8: get 20mol% ethane, 20mol% ethene, 60% tetrafluoro-methane, at normal temperatures behind the physics uniform mixing as refrigeration agent.Its condensing pressure is 1.08Mpa, and vaporization temperature is-116 ℃.
Case study on implementation 9: get 30mol% ethane, 30mol% ethene, 40% tetrafluoro-methane, at normal temperatures behind the physics uniform mixing as refrigeration agent.Its condensing pressure is 1.03Mpa, and vaporization temperature is-108 ℃.
From above case study on implementation as can be seen, in three grades of cascade refrigeration systems, third stage low temperature level adopts compression ratio at the compressor below 12, when using mix refrigerant of the present invention operation, the vaporization temperature of its third stage low temperature level system can reach between-105 ℃～-125 ℃ fully, and used component ODP (ozone layer destroying coefficient) is 0, can be described as environment friendly refrigerating fluid.
Claims (4)
- One kind be applicable to-105 ℃～-125 ℃ the refrigeration warm areas mix refrigerant, it is characterized in that: this refrigeration agent is mixed with one or both in ethane, the ethene in tetrafluoro-methane, these components carry out physical mixed at normal temperatures by its corresponding mixture ratio, get final product this low-temperature mixed refrigeration agent.
- 2. the mix refrigerant of a kind of being applicable to-105 according to claim 1 ℃～-125 ℃ of refrigeration warm areas, it is characterized in that: this refrigeration agent contains the ethene by mole densitometer 5%～60%, 5%～60% ethane, 40%～90% tetrafluoro-methane.
- 3. the mix refrigerant of a kind of being applicable to-105 according to claim 1 ℃～-125 ℃ of refrigeration warm areas, it is characterized in that: this refrigeration agent contains the ethene by mole densitometer 10%～60%, 40%～90% tetrafluoro-methane.
- 4. the mix refrigerant of a kind of being applicable to-105 according to claim 1 ℃～-125 ℃ of refrigeration warm areas, it is characterized in that: this refrigeration agent contains the ethane by mole densitometer 10%～60%, 40%～90% tetrafluoro-methane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710304784 CN101225292B (en) | 2007-12-29 | 2007-12-29 | Mixed refrigerant adapted for refrigerating temperature range of minus 105 degree centigrade to minus 125 degree centigrade |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710304784 CN101225292B (en) | 2007-12-29 | 2007-12-29 | Mixed refrigerant adapted for refrigerating temperature range of minus 105 degree centigrade to minus 125 degree centigrade |
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| CN101225292A true CN101225292A (en) | 2008-07-23 |
| CN101225292B CN101225292B (en) | 2013-07-31 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335491A (en) * | 2013-07-18 | 2013-10-02 | 上海千山远东制药机械有限公司 | Low-temperature vacuum freeze drier |
| CN103555279A (en) * | 2013-11-20 | 2014-02-05 | 郑州长城科工贸有限公司 | Refrigerant applicable to three-stage cascade refrigeration system using polyester oil for lubrication |
| CN105571203A (en) * | 2016-02-01 | 2016-05-11 | 南京航空航天大学 | Multistage heat exchange system |
| WO2021121546A1 (en) | 2019-12-16 | 2021-06-24 | Mainklima Gmbh | Compression refrigeration system for electric refrigeration chambers |
| CN113251698A (en) * | 2021-04-29 | 2021-08-13 | 太原理工大学 | Large-temperature-difference multistage compression mixed working medium heat pump system suitable for recovering waste heat of power plant |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6327866B1 (en) * | 1998-12-30 | 2001-12-11 | Praxair Technology, Inc. | Food freezing method using a multicomponent refrigerant |
| AU2002349758A1 (en) * | 2002-12-03 | 2004-06-23 | Nihon Freezer Co., Ltd. | Refrigerator system using non-azeotropic refrigerant, and non-azeotropic refrigerant for very low temperature used for the system |
-
2007
- 2007-12-29 CN CN 200710304784 patent/CN101225292B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335491A (en) * | 2013-07-18 | 2013-10-02 | 上海千山远东制药机械有限公司 | Low-temperature vacuum freeze drier |
| CN103555279A (en) * | 2013-11-20 | 2014-02-05 | 郑州长城科工贸有限公司 | Refrigerant applicable to three-stage cascade refrigeration system using polyester oil for lubrication |
| CN103555279B (en) * | 2013-11-20 | 2015-12-09 | 郑州长城科工贸有限公司 | Adopt three grades of cascade refrigeration systems of polyester oil lubrication |
| CN105571203A (en) * | 2016-02-01 | 2016-05-11 | 南京航空航天大学 | Multistage heat exchange system |
| WO2021121546A1 (en) | 2019-12-16 | 2021-06-24 | Mainklima Gmbh | Compression refrigeration system for electric refrigeration chambers |
| CN113251698A (en) * | 2021-04-29 | 2021-08-13 | 太原理工大学 | Large-temperature-difference multistage compression mixed working medium heat pump system suitable for recovering waste heat of power plant |
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| CN101225292B (en) | 2013-07-31 |
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