High efficiency and low GWP drop-in replacements for R404A and R22

As part of its continuous research into replacements for Ozone Depleting Substances and low Greenhouse Warming Potential (GWP) refrigerants, Refrigerant Solutions Ltd (RSL) has developed non flammable and energy efficient drop-in alternatives for both R22 and R404A. These new products are RS-50 (R442A), which replaces R404A and RS-70, which replaces R22.

RS-50 (R442A) has a Global Warming Potential (GWP) of less than one half of R404A together with significantly higher efficiency capacity. Independent university tests carried out under identical conditions on RS-50 (R442A) and five other refrigerants, including R404A, R407A, R507, R407F and R22, demonstrated the considerably higher energy efficiency and cooling power of RS-50 compared to the other refrigerants:


R407F R407A RS-50 R507 R404A R22
P evaporation

( bar)

1.35 1.3 1.35 1.7 1.64 1.27
P condensation (bar) 16.1 14.8 16.2 17 16.05 12.68
P high/P low 11.93 11.33 12 10 9.78 9.98
Discharge temp (°C) 85 82 83 79 78 85
Cooling capacity (W) 1252 935 1477 1090 992 1263
Coefficient of Performance 1.76 1.6 1.94 1.52 1.37 1.89



The high energy efficiency and capacity of RS-50 has been confirmed in a series of field trials, eg replacing R404A with RS-50 at supermarkets Auchan Meriadeck, Bordeaux; 8 a Huit,  Lambres Lez Douai; Sorli Discau Barcelona and others, and at McVities, Glasgow and S K Foods, Middlesbrough. In all these cases, energy efficiencies exceeding R404A compared to R404A were experienced.

RS-50 can be used to replace R404A in both new and existing equipment. No changes to the hardware are necessary. Because the properties of RS-50 are similar to R404A, it is suitable for use in many of the applications where R404A is commonly found, including supermarket display cases, cold stores, freezers, refrigerated transport, ice machines, cold storage, transportation of foodstuffs, freezer cabinets, beer cellars, freeze dryers and environmental test chambers. R22 is also used in many of these refrigeration applications, where RS-50 can be a suitable replacement.

RS-70 is a non-flammable drop-in replacement for R22, which has been designed to have the lowest possible Global GWP consistent with high thermodynamic performance having a similar cooling capacity and Coefficient of Performance (COP) as R22. Consequently, RS-70 can be used to replace R22 in both air conditioning and refrigeration applications across the temperature range where R22 is commonly used. RS-70 is compatible both with the traditional mineral and alkylbenzene oils, and also the polyol ester lubricants, so that there is no need to change the existing lubricant in the system when retrofitting to R22. With its high technical performance, compatibility with all lubricants and low GWP, RS-70 is an excellent choice to replace R22 as the end of R22 approaches as mandated under the F-gas regulation in the European Union.

The GWP of RS-70 is lower than all other drop-in replacements for R22 available on the market, including R438A, R417A, R422B, R422D, R417B and others. The GWP of RS-70 is also lower than R427A, R407A, R407F and R421A. However, this has not been achieved by sacrificing performance since RS-70 is similar to R22 in terms of cooling capacity, COP, mass flow, compression ratio and discharge pressure while having a lower discharge temperature. Accordingly, RS-70 is an excellent choice to replace R22 in the majority of applications where R22 is found

– See more at: http://www.acr-news.com/high-efficiency-and-low-gwp-drop-in-replacements-for-r404a-and-r22#sthash.qoB8Pqxb.dpuf

Addition Of Subclass 2L Refrigerants

Addition Of Subclass 2L Refrigerants Proposed For ASHRAE Refrigerant Safety Standard

Dec 9, 2015

Contact: Jodi Scott
Public Relations

ATLANTA – Industry input is being sought into a proposal to modify portions of ASHRAE’s refrigeration safety standard to incorporate subclass 2L flammability classifications.

Addendum d to ANSI/ASHRAE Standard 15-2013, Safety Standard for Refrigeration Systems, is open for public comment until Jan. 18, 2016. To comment or learn more, visitwww.ashrae.org/publicreviews.

Standard 15 specifies safe design, construction, installation, and operation of refrigeration systems.

The 2010 edition of ANSI/ASHRAE Standard 34-2013, Designation and Safety Classification of Refrigerants,  added an optional Subclass 2L to the existing Class 2 flammability classification of refrigerants. This change was intended to separate single component and blended refrigerants that are difficult to ignite and sustain a flame, from other Class 2 (and Class 3) flammable refrigerants.

“The expectation was that some of the Class 2L refrigerants would be commercialized and used as substitutes for Class A1 refrigerants that are in use today,” Dennis Dorman, chair of the Standard 15 committee, said. “Refrigerants in use today may come under regulatory pressure due to their relatively higher global warming potential (GWP).  But to do this without major economic impact, Class 2L would have to be safely applied without the stringent application limitations imposed by Standard 15 on other flammable refrigerants. In other words, in order to be broadly applied, Class 2L refrigerants would need to be treated more like Class 1 than Class 2 or Class 3.”

At the start of its deliberations, the committee discovered that there was almost no science to support rules changes, let alone relaxation, of Class 2 requirements, according to Dorman.  In July 2011, a first public review of the proposed addendum was made available with numerous comments received. Since that time, the committee has been addressing the technical issues identified from that review.

Dorman noted that Standard 15 covers the full range of applications from residential to commercial to industrial applications. As such, there is an unusual degree of complexity in considering appropriate rules for each.

Now, after almost four years of research and other supporting activities conducted by industry partners, the committee has much of the technical information to support proposed rules changes to Standard 15.
“With this public review, we are seeking suggestions for new, unusual or potentially controversial elements of the proposed addendum, which the committee believes would benefit from increased public input prior to finalizing the draft for its first formal public review,” he said. “Additionally we want to make sure that we do not overlook important safety aspects that may come from various users of the standard, both domestic and international.”

ASHRAE, founded in 1894, is a global society advancing human well-being through sustainable technology for the built environment. The Society and its more than 54,000 members worldwide focus on building systems, energy efficiency, indoor air quality, refrigeration and sustainability. Through research, standards writing, publishing, certification and continuing education, ASHRAE shapes tomorrow’s built environment today. More information can be found at www.ashrae.org/news.

US EPA Targets High-GWP Refrigerants in SNAP Proposal

US EPA Targets High-GWP Refrigerants in SNAP Proposal

R-134a, -404A, and -507 Face Proposed Use Restrictions in 2016

The US government is proposing to restrict the use of hydrofluorocarbon (HFC) refrigerants R-134a, -404A and -507 in certain new and retrofit retail food applications.

On Aug. 9, the U.S. Environmental Protection Agency (EPA) published “40 CFR Part 82 Protection of Stratospheric Ozone: Change of Listing Status for Certain Substitutes Under the Significant New Alternatives Policy Program; Proposed Rule” in the Federal Register.

The rule deems certain HFC refrigerants unacceptable in specific applications on or after Jan. 1, 2016. If implemented, the ruling would impact:

• R-507 and -404A for “new and retrofit retail food refrigeration (including stand-alone equipment, condensing units, direct supermarket systems, and indirect supermarket systems) and new and retrofit vending machines.”

• R–227ea, –407B, –421B, –422A, –422C, –422D, –428A, and –434A for “new and retrofit retail food refrigeration (including direct supermarket systems and indirect supermarket systems).”

• R-134a “and certain other HFC refrigerant blends for new stand-alone retail food refrigeration and new vending machines.”

A Proposal for Now

The proposal is just that — a proposal. The agency is accepting comments through Oct. 6, after which it would issue a final ruling. The proposal is based on concerns about the perceived high-global warming potential (GWP) of the listed refrigerants. All are used within the retail food sector, where leak rates for equipment can be as high as 30 percent, although that sector has made significant strides in recent years to reduce those rates.

The proposal is also based on the EPA’s contention that acceptable alternatives are available. These include low-GWP HFCs, hydrocarbons (HCs), and CO?.

ASHRAE Refrigerant Designations

ASHRAE Refrigerant Designations

The tables contained on this page list approved refrigerant numbers from ANSI/ASHRAE 34-2013, Designation and Safety Classification of Refrigerants, the latest edition of Standard 34, which describes a shorthand way of naming refrigerants and assigns safety classifications based on toxicity and flammability data.*
Further information can be found in the latest version of Standard 34, available in the ASHRAE bookstore, and its published addenda, available on the Standards Addenda page.

Methane Series
Ethane Series
Cyclic Organic Compounds
Miscellaneous Organic Compounds
Nitrogen Compounds
Inorganic Compounds
Unsaturated Organic Compounds
Refrigerant Blends


Chemical Name
Chemical Formula
Methane Series
11 trichlorofluoromethane CCl 3F
12 dichlorodifluoromethane CCl 2F 2
12B1 bromochlorodifluoromethane CBrClF 2
13 chlorotrifluoromethane CClF 3
13B1 bromotrifluoromethane CBrF 3
14e tetrafluoromethane (carbon tetrafluoride) CF 4
21 dichlorofluoromethane CHCl 2F
22 chlorodifluoromethane CHClF 2
23 trifluoromethane CHF 3
30 dichloromethane (methylene chloride) CH 2Cl 2
31 chlorofluoromethane CH 2ClF
32 difluoromethane (methylene fluoride) CH 2F 2
40 chloromethane (methyl chloride) CH 3Cl
41 fluoromethane (methyl fluoride) CH 3F
50 methane CH 4

Chemical Name
Chemical Formula
Ethane Series
113 1,1,2-trichloro-1,2,2-trifluoroethane CCl 2FCClF 2
114 1,2-dichloro-1,1,2,2-tetrafluoromethane CClF 2CClF 2
115 chloropentafluoroethane CClF 2CF 3
116 hexafluoroethane CF 3CF 3
123 2,2-dichloro-1,1,1-trifluoroethane CHCl 2CF 3
124 2-chloro-1,1,1,2-tetrafluoroethane CHClFCF 3
125 pentafluoroethane CHF 2CF 3
134a 1,1,1,2-tetrafluoroethane CH 2FCF 3
141b 1,1-dichloro-1-fluoroethane CH 3CCl 2F
142b 1-chloro-1,1-difluoroethane CH 3CClF 2
143a 1,1,1-trifluoroethane CH 3CF 3
152a 1,1-difluoroethane CH 3CHF 2
170 ethane CH 3CH 3

Chemical Name
Chemical Formula
E170 Dimethyl Ether CH3OCH3

Chemical Name
Chemical Formula
218 octafluoropropane CF 3CF 2CF 3
227ea 1,1,1,2,3,3,3-heptafluoropropane CF 3CHFCF 3
236fa 1,1,1,3,3,3-hexafluoropropane CF 3CH 2CF 3
245fa 1,1,1,3,3-pentafluoropropane CHF 2CH 2CF 3
290 propane CH 3CH 2CH 3

Chemical Name
Chemical Formula
Cyclic Organic Compounds
C318 octafluorocyclobutane -(CF 2) 4

Miscellaneous Organic Compounds
Chemical Name
Chemical Formula
600 butane CH 3CH 2CH 2CH 3 A3
600a isobutane CH(CH 3) 2CH 3 A3
601 Pentane CH 3CH 2CH 2 CH 2CH3
601a Isopentane CH(CH 3) 2 CH 2CH 3
oxygen compounds
610 ethyl ether CH 3CH 2 OCH 2CH 3
611 methyl formate HCOOCH 3
sulfur compounds
620           (Reserved for future assignment)

Chemical Name
Chemical Formula
Nitrogen Compounds
630 methyl amine CH 3NH 2
631 ethyl amine CH 3CH 2(NH 2)

Chemical Name
Chemical Formula
Inorganic Compounds
702 hydrogen H 2
704 helium He
717 ammonia NH 3
718 water H 2O
720 neon Ne
728 nitrogen N 2
732 oxygen O 2
740 argon Ar
744 carbon dioxide CO 2
744A nitrous oxide N 2O
764 sulfur dioxide SO 2

Chemical Name
Chemical Formula
Unsaturated Organic Compounds
1150 ethene (ethylene) CH2=CH2
1234yf 2,3,3,3-tetrafluoro-1-propene CF3CF=CH2
1234ze(E) trans-1,3,3,3-tetrafluoro-1-propene CF3CH=CHF
1270 propene (propylene) CH3CH=CH 2

Refrigerant Blends

Refrigerant Composition (Mass % )
400 R-12/114 (must be specified)
401A R-22/152a/124 (53.0/13.0/34.0)
401B R-22/152a/124 (61.0/11.0/28.0
401C R-22/152a/124 (33.0/15.0/52.0)
402A R-125/290/22 (60.0/2.0/38.0)
402B R-125/290/22 (38.0/2.0/60.0)
403A R-290/22/218 (5.0/75.0/20.0)
403B R-290/22/218 (5.0/56.0/39.0)
404A R-125/143a/134a (44.0/52.0/4.0)
405A R-22/152a/142b/C318 (45.0/7.0/5.5/42.5)
406A R-22/600a/142b (55.0/4.0/41.0)
407A R-32/125/134a (20.0/40.0/40.0)
407B R-32/125/134a (10.0/70.0/20.0)
407C R-32/125/134a (23.0/25.0/52.0)
407D R-32/125/134a (15.0/15.0/70.0)
407E R-32/125/134a (25.0/15.0/60.0)
407F R-32/125/134a (30.0/30.0/40.0)
408A R-125/143a/22 (7.0/46.0/47.0)
409A R-22/124/142b (60.0/25.0/15.0)
409B R-22/124/142b (65.0/25.0/10.0)
410A R-32/125 (50.0/50.0)
410B R-32/125 (45.0/55.0)
411A R-1270/22/152a) (1.5/87.5/11.0)
411B R-1270/22/152a (3.0/94.0/3.0)
412A R-22/218/143b (70.0/5.0/25.0 k
413A R-218/134a/600a (9.0/88.0/3.0)
414A R-22/124/600a/142b (51.0/28.5/4.0/16.5)
414B R-22/124/600a/142b (50.0/39.0/1.5/9.5)
415A R-22/152a (82.0/18.0)
415B R-22/152a (25.0/75.0)
416A R-134a/124/600 (59.0/39.5/1.5)
417A R-125/134a/600 (46.6/50.0/3.4)
417B R-125/134a/600 (79.0/18.3/2.7)
417C R-125/134a/600 (19.5/78.8/1.7)
418A R-290/22/152a (1.5/96.0/2.5)
419A R-125/134a/E170 (77.0/19.0/4.0)
419B R-125/134a/E170 (48.5/48.0/3.5)
420A R-134a/142b (88.0/12.0)
421A R-125/134a (58.0/42.0)
421B R-125/134a (85.0/15.0)
422A R-125/134a/600a (85.1/11.5/3.4)
422B R-125/134a/600a (55.0/42.0/3.0)
422C R-125/134a/600a (82.0/15.0/3.0)
422D R-125/134a/600a (65.1/31.5/3.4)
422E R-125/134a/600a (58.0/39.3/2.7)
423A 134a/227ea (52.5/47.5)
424A R-125/134a/600a/600/601a (50.5/47.0/0.9/1.0/0.6)
425A R-32/134a/227ea (18.5/69.5/12)
426A R-125/134a/600/601a (5.1/93.0/1.3/0.6)
427A R-32/125/143a/134a (15.0/25.0/10.0/50.0)
428A R-125/143a/290/600a (77.5/20.0/0.6/1.9)
429A R-E170/152a/600a (60.0/10.0/30.0)
430A R-152a/600a (76.0/24.0)
431A R-290/152a (71.0/29.0)
432A R-1270/E170 (80.0/20.0)
433A R-1270/290 (30.0/70.0)
433B R-1270/290 (5.0/95.0)
433C R-1270/290 (25.0/75.0)
434A R-125/143a/134a/600a
435A R-E170/152a (80.0/20.0)
436A R-290/600a (56.0/44.0)
436B R-290/600a (52.0/48.0)
437A R-125/134a/600/601 (19.5/78.5/1.4/0.6)
438A R-32/125/134a/600/601a (8.5/45.0/44.2/1.7/0.6)
439A R-32/125/600a (50.0/47.0/3.0)
440A R-290/134a/152a (0.6/1.6/97.8)
441A R-170/290/600a/600 (3.1/54.8/6.0/36.1)
442A R-32/125/134a/152a/227ea (31.0/31.0/30.0/3.0/5.0)
443A R-1270/290/600a (55.0/40.0/5.0)
444A R-32/152a/1234ze(E) (12.0/5.0/83.0)
445A R-744/134a/1234ze(E) (6.0/9.0/85.0)

Refrigerant Composition (Mass % )
500 R-12/152a (73.8/26.2)
501 R-22/12 (75.0/25.0)
502 R-22/115 (48.8/51.2)
503 R-23/13 (40.1/59.9)
504 R-32/115 (48.2/51.8)
505 R-12/31 (78.0/22.0)
506 R-31/114 (55.1/44.9)
507A R-125/143a (50.0/50.0)
508A R-23/116 (39.0/61.0)
508B R-23/116 (46.0/54.0)
509A R-22/218 (44.0/56.0)
510A R-E170/600a (88.0/12.0)
511A R-290/152a (95.0/5.0)
512A R-134a/152a (5.0/95.0)