CN102618220B - A kind of mix refrigerant being applicable to 120K～150K Shen Lengwen district - Google Patents
A kind of mix refrigerant being applicable to 120K～150K Shen Lengwen district Download PDFInfo
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- CN102618220B CN102618220B CN201110027306.2A CN201110027306A CN102618220B CN 102618220 B CN102618220 B CN 102618220B CN 201110027306 A CN201110027306 A CN 201110027306A CN 102618220 B CN102618220 B CN 102618220B
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Abstract
What the present invention relates to provides a kind of mix refrigerant being applicable to unit automatic cascade refrigeration system 120K～150K Shen Lengwen district, and it is made up of six class refrigeration agents, accounts for total mol concentration separately and is: the first kind is that R740, R728 or two kinds of mixtures account for 3%～20%; 2nd class is that R50, R784 or two kinds of mixtures account for 5%～25%; 3rd class is that R14 accounts for 15%～30%; 4th class is that R23 accounts for 15%～25%; The mixture that 5th class is R125, R218, R22, R32 or wherein two kinds, three kinds four kinds accounts for 5%～15%; 6th class is that R236fa, R123, R124 or wherein two kinds, three kinds mixtures account for 20%～30%. Carrying out physical mixed at normal temperatures, to corresponding mix refrigerant, it is possible to make system temperature reach 120K～150K, have good mutual solubility with lubricating oil, ODP value is almost nil. It has economy, environmental protection, safety, the advantage such as non-combustible.
Description
Invention field
The invention belongs to field of refrigeration, it relates to a kind of refrigeration agent, in particular to a kind of mix refrigerant being applicable to unit automatic cascade refrigeration system 120K～150K Shen Lengwen district.
Background technology
In modern refrigerant technology, usually need to use ternary or quaternary cascade refrigeration mode if being as cold as 120K～150K Shen Lengwen district with the use of compression mechanism. And many unit superposition type system complex, it is necessary to compressor, subsidiary component and controlling elements more, failure rate is higher, and technology is relatively backward. So the low temperature technique realizing 120K～150K by unit automatic cascade refrigeration system will obtain tremendous development.
Such as United States Patent (USP) in prior art: US5,441,658 and China's patent: CN97,115,295.0 is applied to for the purpose of liquid nitrogen temperature (80K). But the warm district of real widespread use on current market great majority are between 120K～150K (-123～-153 DEG C), as :-150 DEG C of Ultralow Temperature Freezers ,-140 DEG C of low-temperature metal processing tankes ,-135 DEG C of steam capture pump (Water-VaporCryopump) and cryotrap (Cryotrap) ,-125 DEG C of heat sink experimental boxs of space flight etc. The technology of obvious liquid nitrogen temperature is applied to that 120K～150K temperature district relative energy consumption is higher, efficiency is low, so not being suitable for.
Also having a domestic patent CN1475544A at present, its use temperature district is (100K-150K), it is possible to covers 120K～150K Shen Lengwen district, but also there are problems in actual production process. This patent just provides roughly several refrigeration agents in six Zu Bu equality of temperature districts, and a lot of refrigeration agent is non-mainstream refrigeration agent, have inconvenience purchase, expensive, etc. unfavorable factor. Their not researchist of actual producer technician, it is very difficult to accurately find out the refrigeration agent wanting to use in nearly 20 kinds of refrigeration agents, and the ratio between refrigeration agent, the work of configuration refrigeration agent becomes very loaded down with trivial details, so constraining the development of this technology. In the art, employ that to have the 6th group of material that flammable refrigeration agent (R50, R170, R1150, R290, R600a etc.), particularly this patent mention be all combustible refrigerant in a large number.Although China is to combustible refrigerant without strict regulation, but the charging amount that many countries have expressly provided home freezer or small-sized indoor refrigeration equipment R600a must not more than 150 grams, it is seen that its danger also needs to pay special attention to. This mix refrigerant is applied in generally small-sized refrigeration system, combustible refrigerant often all exceedance kilogram, if being applied to larger system, whole system will be a dangerous powder cask, once it is hardly imaginable to leak consequence.
Summary of the invention
It is an object of the invention to be to provide a kind of mix refrigerant being suitable for unit automatic cascade refrigeration system 120K～150K Shen Lengwen district, it is made up of six class refrigeration agents: the first kind is R740 (argon gas) or R728 (nitrogen); 2nd class is R50 (methane) or R784 (krypton); 3rd class is R14 (tetrafluoro-methane); 4th class is R23 (trifluoromethane) the 5th class is R125 (pentafluoride ethane), R218 (perfluoropropane), R22 (difluorochloromethane), R32 (methylene fluoride); 6th class is R236fa (HFC-236fa), R123 (dichlorotrifluoroethane), R124 (chloro-tetrafluoroethane). The volumetric molar concentration summation of six class refrigeration agents is 100%, and their proportional ranges shared separately are:
The first kind accounts for the 3%～20% of total mol concentration;
2nd class accounts for the 5%～25% of total mol concentration;
3rd class accounts for the 15%～30% of total mol concentration;
4th class accounts for the 15%～25% of total mol concentration;
5th class accounts for the 5%～15% of total mol concentration;
6th class accounts for the 20%～30% of total mol concentration.
Six class refrigeration agents, according to proportioning, carry out physical mixed, so that it may obtain corresponding mix refrigerant at normal temperatures. Use this mix refrigerant that system temperature can be made to reach 120K～150K, and there is with lubricating oil good mutual solubility in systems in which, and ODP value is almost nil. Ensureing that the prerequisite of user's economic benefit has been issued to environmental protection, convenience, safe, non-combustible requirement.
In general, the refrigeration agent of high boiling point is more many, and corresponding compressor operating pressure is more low, and the temperature in vaporizer is more high. Otherwise, the ratio that low boiling point refrigerant contains is more high, and corresponding compressor operating pressure is more high, and the temperature in vaporizer is more low. Compressor operating pressure (absolute pressure) high pressure is generally between 9bar～17bar, and low pressure is between 2bar～3bar. According to actual condition, it is possible to changed. The concrete proportioning in Ge Wen district is:
1,120K temperature district it is applicable to:
First kind refrigeration agent accounts for total mol concentration 15%～20%;
2nd class refrigeration agent accounts for total mol concentration 10%～15%;
3rd class refrigeration agent accounts for total mol concentration 15%～20%;
4th class refrigeration agent accounts for total mol concentration 15%～20%;
5th class refrigeration agent accounts for total mol concentration 5%～10%;
6th class refrigeration agent accounts for total mol concentration 20%～25%;
2,130K temperature district it is applicable to:
First kind refrigeration agent accounts for total mol concentration 10%～15%;
2nd class refrigeration agent accounts for total mol concentration 15%～25%;
3rd class refrigeration agent accounts for total mol concentration 20%～25%;
4th class refrigeration agent accounts for total mol concentration 15%～20%;
5th class refrigeration agent accounts for total mol concentration 8%～12%;
6th class refrigeration agent accounts for total mol concentration 20%～25%;
3,140K temperature district it is applicable to:
First kind refrigeration agent accounts for total mol concentration 5%～10%;
2nd class refrigeration agent accounts for total mol concentration 10%～15%;
3rd class refrigeration agent accounts for total mol concentration 25%～30%;
4th class refrigeration agent accounts for total mol concentration 15%～25%;
5th class refrigeration agent accounts for total mol concentration 10%～15%;
6th class refrigeration agent accounts for total mol concentration 25%～30%;
4,150K temperature district it is applicable to:
First kind refrigeration agent accounts for total mol concentration 3%～5%;
2nd class refrigeration agent accounts for total mol concentration 5%～15%;
3rd class refrigeration agent accounts for total mol concentration 20%～30%;
4th class refrigeration agent accounts for total mol concentration 20%～25%;
5th class refrigeration agent accounts for total mol concentration 10%～15%;
6th class refrigeration agent accounts for total mol concentration 25%～30%;
Their in the system of Pyatyi vaporizer (FIGS 1) form the not equality of temperature district of-10～-25 DEG C ,-45～-55 DEG C ,-75～-90 DEG C ,-100～-120 DEG C ,-125～-155 DEG C five gradients respectively, are caused by the refrigeration agent in adjacent Liang Zhongwen district plays a role jointly in corresponding temperature district.
Accompanying drawing explanation
Fig. 1 is the unit automatic cascade Pyatyi refrigeration system schematic diagram being applicable to the present invention, and wherein 1 is compressor, and 2 is oil separator, 3 is condenser, and 4,7,8,9 is gas-liquid separator, and 5 is device for drying and filtering, 6 is throttling set, and 10 is load, and 11,12,13,14,15 is vaporizer-condenser.
The advantage of the present invention is as follows:
1, environmental requirement is met:
Consuming ozone latent energy value ODP value more little, the environmental characteristics of refrigeration agent is more good. According to current level, it is believed that ODP value is less than or the refrigeration agent that equals 0.05 can accept. In the mix refrigerant of the present invention, major part refrigeration agent ODP is 0; Refrigeration agent ODP is lower for minority, and wherein R22 is 0.034, R123, R124 is 0.02, meets Ozonosphere protection in relevant environmental protection standard, reduces the requirement of Greenhouse effect.
2, low temperature current downflow is good:
In modern refrigerant technology, due to the use of environmental protection environmental protection refrigerant, compressor oil adopts POE (polyvalent alcohol fatty oil) mostly, and the 3rd, 4,5,6 class refrigeration agents all have good mutual solubility with polyol resin lubricating oil, flow through kapillary under low temperature, expansion valve throttling device there will not be oil to solidify and paraffin blockage phenomenon; Owing to there being the gas-liquid separator of nearly level Four in system, compressor oil can not arrive-120 Du Wen districts, so the 1st, 2 class refrigeration agents need not consider its molten oiliness.
3, uninflammability, security:
Except R50, ownership system cryogen is all non-combustible, nontoxic, without explosion hazard. Because ratio shared by R50 in mix refrigerant is less, even if using R50, danger coefficient is also lower. Can also consider to use the R784 not fired to replace R50.
4, buy conveniently, cheap:
Ownership system cryogen is all widely applied in refrigeration industry or other industry, cheap, and buying is convenient.
5, configuration is simple:
Six class refrigeration agents carry out physical mixed at normal temperatures, so that it may obtain corresponding mix refrigerant. In six class refrigeration agents, according to market situation, every class is only selected wherein a kind of, can configure. In development, exploitation and maintenance process, because they work together to the vaporizer in 5 Ge Wen districts, wonder which kind of refrigeration agent is many or few, only need to detect the height of the temperature in its corresponding temperature district, so that it may determine the increase and decrease of its charging amount.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Configuration is applicable to the mix refrigerant in unit automatic cascade refrigeration system 120K～150K Shen Lengwen district, and it comprises following 6 class refrigeration agents: the first kind is R740 (argon gas) or R728 (nitrogen);2nd class is methane (R50) or R784 (krypton); 3rd class is R14 (tetrafluoro-methane); 4th class is R23 (trifluoromethane); 5th class is R125 (pentafluoride ethane), R218 (perfluoropropane), R22 (difluorochloromethane), R32 (methylene fluoride); 6th class is R236fa (HFC-236fa), R123 (dichlorotrifluoroethane), R124 (chloro-tetrafluoroethane).
Embodiment 1: configuration is used in the mix refrigerant in 120K temperature district, and every class refrigeration agent volumetric molar concentration is as follows:
The first kind: R728 accounts for total mol concentration 10%, R740 and accounts for total mol concentration 10%;
2nd class: R50 accounts for total mol concentration 10%; R784 accounts for total mol concentration 5%;
3rd class: R14 accounts for total mol concentration 20%;
4th class: R23 accounts for total mol concentration 20%;
5th class: R22 accounts for total mol concentration 5%, and all the other are 0%;
6th class: R123 accounts for total mol concentration 20%, and all the other are 0%.
Operating parameter is: condensing temperature 300K, refrigeration temperature 120K, compressor exhaust temperature 380K, high pressure 220psi, low pressure 25psi.
Embodiment 2: configuration is used in the mix refrigerant in 120K temperature district, and every class refrigeration agent volumetric molar concentration is as follows:
The first kind: R728 accounts for total mol concentration 5%, R740 and accounts for total mol concentration 15%;
2nd class: R50 accounts for total mol concentration 5%; R784 accounts for total mol concentration 10%;
3rd class: R14 accounts for total mol concentration 15%;
4th class: R23 accounts for total mol concentration 20%;
5th class: R32 accounts for total mol concentration 5%, R22 and accounts for total mol concentration 5%, and all the other are 0%;
6th class: R123 accounts for total mol concentration 20%, and all the other are 0%.
Operating parameter is: condensing temperature 300K, refrigeration temperature 120K, compressor exhaust temperature 380K, high pressure 215PSI, low pressure 22psi.
Embodiment 3: configuration is used in the mix refrigerant in 130K temperature district, and every class refrigeration agent volumetric molar concentration is as follows:
The first kind: R740 accounts for total mol concentration 15%, and all the other are 0%;
2nd class: R784 accounts for total mol concentration 20%, and all the other are 0%;
3rd class: R14 accounts for total mol concentration 20%;
4th class: R23 accounts for total mol concentration 15%;
5th class: R125 accounts for total mol concentration 3%, R218 and accounts for total mol concentration 7%, and all the other are 0%;
6th class: R123 accounts for total mol concentration 10%, R124 and accounts for total mol concentration 10%, and all the other are 0%;
Operating parameter is: condensing temperature 300K, refrigeration temperature 130K, compressor exhaust temperature 375K, high pressure 205PSI, low pressure 25psi.
Embodiment 4: configuration is used in the mix refrigerant in 130K temperature district, and every class refrigeration agent volumetric molar concentration is as follows:
The first kind: R740 accounts for total mol concentration 8%, R728 and accounts for total mol concentration 5%;
2nd class: R784 accounts for total mol concentration 5%, R50 and accounts for total mol concentration 12%;
3rd class: R14 accounts for total mol concentration 20%;
4th class: R23 accounts for total mol concentration 20%;
5th class: R32 accounts for total mol concentration 5%, R218 and accounts for total mol concentration 5%, and all the other are 0%;
6th class: R123 accounts for total mol concentration 10%, R124 and accounts for total mol concentration 10%, and all the other are 0%;
Operating parameter is: condensing temperature 300K, refrigeration temperature 130K, compressor exhaust temperature 375K, high pressure 200PSI, low pressure 22psi.
Embodiment 5: configuration is used in the mix refrigerant in 140K temperature district, and every class refrigeration agent volumetric molar concentration is as follows:
The first kind: R740 accounts for total mol concentration 8%, and all the other are 0%;
2nd class: R50 accounts for total mol concentration 10%;R728 accounts for total mol concentration 5%
3rd class: R14 accounts for total mol concentration 25%;
4th class: R23 accounts for total mol concentration 17%;
5th class: R218 accounts for total mol concentration 5%; R125 accounts for total mol concentration 5%, and all the other are 0%;
6th class: R123 accounts for total mol concentration 10%; R236fa accounts for total mol concentration 15%, and all the other are 0%;
Operating parameter is: condensing temperature 300K, refrigeration temperature 140K, compressor exhaust temperature 365K, high pressure 190psi, low pressure 20psi.
Embodiment 6: configuration is used in the mix refrigerant in 140K temperature district, and every class refrigeration agent volumetric molar concentration is as follows:
The first kind: R740 accounts for total mol concentration 3%, R728 and accounts for total mol concentration 2%;
2nd class: R50 accounts for total mol concentration 5%; R784 accounts for total mol concentration 10%
3rd class: R14 accounts for total mol concentration 30%;
4th class: R23 accounts for total mol concentration 15%;
5th class: R218 accounts for total mol concentration 2%; R125 accounts for total mol concentration 3%, R125 and accounts for total mol concentration 5%, and all the other are 0%;
6th class: R123 accounts for total mol concentration 10%; R236fa accounts for total mol concentration 15%, and all the other are 0%;
Operating parameter is: condensing temperature 300K, refrigeration temperature 140K, compressor exhaust temperature 365K, high pressure 190psi, low pressure 22psi.
Embodiment 7: configuration is used in the mix refrigerant in 150K temperature district, and every class refrigeration agent volumetric molar concentration is as follows:
The first kind: R740 accounts for total mol concentration 3%, and all the other are 0%;
2nd class: R50 accounts for total mol concentration 3%; R784 is 4%
3rd class: R14 accounts for total mol concentration 25%;
4th class: R23 accounts for total mol concentration 25%;
5th class: R218 accounts for total mol concentration 5%; R125 accounts for total mol concentration 10%, and all the other are 0%;
6th class: R123 accounts for total mol concentration 10%; R236fa accounts for total mol concentration 15%, and all the other are 0%;
Operating parameter is: condensing temperature 300K, refrigeration temperature 150K, compressor exhaust temperature 365K, high pressure 180psi, low pressure 15psi.
Embodiment 8: configuration is used in the mix refrigerant in 150K temperature district, and every class refrigeration agent volumetric molar concentration is as follows:
The first kind: R728 accounts for total mol concentration 3%, and all the other are 0%;
2nd class: R50 accounts for total mol concentration 7%; R784 is 3%
3rd class: R14 accounts for total mol concentration 27%;
4th class: R23 accounts for total mol concentration 20%;
5th class: R125 accounts for total mol concentration 5%, R32 total mol concentration 5%, and all the other are 0%;
6th class: R123 accounts for total mol concentration 10%; R236fa accounts for total mol concentration 10%, R124 and accounts for total mol concentration 10%.
Operating parameter is: condensing temperature 300K, refrigeration temperature 150K, compressor exhaust temperature 365K, high pressure 170psi, low pressure 18psi.
As can be seen from above case study on implementation, in unit superposition type Pyatyi refrigeration system, adopt the compressor of compression ratio below 10, the mix refrigerant of application the present invention, during operation, its vaporization temperature can reach between 120K～150K completely, and refrigeration agent ODP used (ozone layer destroying coefficient) all meet the requirement of environmental protections, combustibility is extremely low, can be called environment-friendly type mix refrigerant.
Claims (5)
1. one kind is applicable to the mix refrigerant in 120K～150K Shen Lengwen district, it is characterised in that it is made up of six class refrigeration agents: the first kind is the mixture of R740 (argon gas) or R728 (nitrogen) or two kinds; 2nd class is the mixture of R50 (methane) or R784 (krypton) or two kinds; 3rd class is R14 (tetrafluoro-methane);4th class is R23 (trifluoromethane); 5th class is the mixture of R125 (pentafluoride ethane), R218 (perfluoropropane), R22 (difluorochloromethane), R32 (methylene fluoride) or any two kinds, three kinds or four kinds; 6th class is R236fa (HFC-236fa), R123 (dichlorotrifluoroethane), R124 (chloro-tetrafluoroethane) or the wherein mixture of any two kinds, three kinds; The ODP value that the ODP value of R22 (difluorochloromethane) is 0.034, R123 (dichlorotrifluoroethane), R124 (chloro-tetrafluoroethane) is 0.02; The volumetric molar concentration summation of six class refrigeration agents is 100%, and their proportional ranges shared separately are:
The first kind accounts for the 3%～20% of total mol concentration;
2nd class accounts for the 5%～25% of total mol concentration;
3rd class accounts for the 15%～30% of total mol concentration;
4th class accounts for the 15%～25% of total mol concentration;
5th class accounts for the 5%～15% of total mol concentration;
6th class accounts for the 20%～30% of total mol concentration.
2. be applicable to the mix refrigerant in 120K～150K Shen Lengwen district as claimed in claim 1, it is characterised in that described in be applicable to total mol concentration shared by the every class refrigeration agent of mix refrigerant in 120K Shen Lengwen district ratio be:
First kind refrigeration agent accounts for total mol concentration 15%～20%;
2nd class refrigeration agent accounts for total mol concentration 10%～15%;
3rd class refrigeration agent accounts for total mol concentration 15%～20%;
4th class refrigeration agent accounts for total mol concentration 15%～20%;
5th class refrigeration agent accounts for total mol concentration 5%～10%;
6th class refrigeration agent accounts for total mol concentration 20%～25%.
3. be applicable to the mix refrigerant in 120K～150K Shen Lengwen district as claimed in claim 1, it is characterised in that described in be applicable to total mol concentration shared by the every class refrigeration agent of mix refrigerant in 130K Shen Lengwen district ratio be:
First kind refrigeration agent accounts for total mol concentration 10%～15%;
2nd class refrigeration agent accounts for total mol concentration 15%～25%;
3rd class refrigeration agent accounts for total mol concentration 20%～25%;
4th class refrigeration agent accounts for total mol concentration 15%～20%;
5th class refrigeration agent accounts for total mol concentration 8%～12%;
6th class refrigeration agent accounts for total mol concentration 20%～25%.
4. be applicable to the mix refrigerant in 120K～150K Shen Lengwen district as claimed in claim 1, it is characterised in that described in be applicable to total mol concentration shared by the every class refrigeration agent of mix refrigerant in 140K Shen Lengwen district ratio be:
First kind refrigeration agent accounts for total mol concentration 5%～10%;
2nd class refrigeration agent accounts for total mol concentration 10%～15%;
3rd class refrigeration agent accounts for total mol concentration 25%～30%;
4th class refrigeration agent accounts for total mol concentration 15%～25%;
5th class refrigeration agent accounts for total mol concentration 10%～15%;
6th class refrigeration agent accounts for total mol concentration 25%～30%.
5. be applicable to the mix refrigerant in 120K～150K Shen Lengwen district as claimed in claim 1, it is characterised in that described in be applicable to total mol concentration shared by the every class refrigeration agent of mix refrigerant in 150K Shen Lengwen district ratio be:
First kind refrigeration agent accounts for total mol concentration 3%～5%;
2nd class refrigeration agent accounts for total mol concentration 5%～15%;
3rd class refrigeration agent accounts for total mol concentration 20%～30%;
4th class refrigeration agent accounts for total mol concentration 20%～25%;
5th class refrigeration agent accounts for total mol concentration 10%～15%;
6th class refrigeration agent accounts for total mol concentration 25%～30%.
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| CN102618220B true CN102618220B (en) | 2016-06-15 |
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| CN105885797A (en) * | 2014-09-07 | 2016-08-24 | 张永康 | Incombustible mixed refrigerant suitable for -50 to -70 DEG C temperature range of refrigeration |
| CN104188791A (en) * | 2014-09-15 | 2014-12-10 | 龙志刚 | Cryogenic sauna facility |
| CN105586009A (en) * | 2014-10-29 | 2016-05-18 | 张永康 | Inflammable mixture refrigerant being suitable at refrigerating temperature zone of -75 - -105 DEG C |
| CN107674649A (en) * | 2017-10-26 | 2018-02-09 | 焦景田 | A kind of working medium group for heat pump cycle |
| CN110028937B (en) * | 2019-04-26 | 2021-09-17 | 中国科学院理化技术研究所 | Mixed non-combustible cold storage medium |
| CN110257011A (en) * | 2019-06-13 | 2019-09-20 | 深圳市泰祺科技有限公司 | The non-combustible ice making agent of -20~-80 degrees Celsius of low-temperature energy-savings |
| CN110511726B (en) * | 2019-09-23 | 2021-06-11 | 杨文海 | Formula of mixed refrigerant with minimum temperature of-150 DEG C |
| GB2597501A (en) * | 2020-07-24 | 2022-02-02 | Edwards Vacuum Llc | Mixed refrigerants with reduced GWP for use in ultra-low temperature refrigeration |
| CN116606632B (en) * | 2023-07-19 | 2023-10-20 | 中科美菱低温科技股份有限公司 | Refrigerant and method for producing the same |
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