Talk:List of refrigerants

Dimethyl ether

I am by no means an expert on refrigerants, but I happened to notice that dimethyl ether has an ASHRAE number (E170):

http://www.ashrae.org/technology/page/1933

However, dimethyl ether does not appear in the Wikipedia List of refrigerants ... is there a reason for this? --Andersneld (talk) 12:01, 8 March 2011 (UTC)

You probably already know this, but dimethyl ether has been added. Its omission was no doubt an oversight.

ChrisWinter (talk) 20:10, 14 April 2012 (UTC)

Add EPA Designations and Downloadable File to Make Super Useful

This is the best reference on ASHRAE numbers and GWPs I have seen! Could we improve it by adding the EPA and global numbering scheme for Ozone Depleting Substances as a cross reference? This would be even more useful. Having a downloadable spreadsheet would also be nice. I am a wiki newbie so would not venture to do this myself although the cross refernce sources are in 40 CFR 98 Table A-1 and http://www.epa.gov/ozone/geninfo/numbers.html

Pugliop (talk) 22:57, 29 August 2011 (UTC)

Practically worthless

This article's table is practically worthless. I would delete all of the global warming mumbo jumbo and replace it with hard facts, such as the refrigerant's boiling point or vapor pressure at STP or something that has some practical use in refrigeration. Adding in the global warming potential is like listing the types of fuels derived from petroleum and not listing their heating values when burnt in air but instead focusing on how toxic each one is if ingested. The big picture is more important than the bunny trails. I like to saw logs! (talk) 23:44, 27 January 2012 (UTC)

Copyright issues are probably the reason this has not been done. For example, Fluke has a copyrighted table online giving the data you want for some refrigerants. Google is your friend.

ChrisWinter (talk) 20:18, 14 April 2012 (UTC)

Unwarranted precision?

I haven't looked at the primary sources for this data, but some values seem way too precise. Example: Atmospheric lifetime for R-401A is given as 8.514 years. Whew! It's a good thing it doesn't last for 8.517 years. That's facetious, but you get the idea. They should be rounded to one decimal point. ChrisWinter (talk) 20:24, 14 April 2012 (UTC)

Well even more, there is one that is 1,366.4825. It looks like the ones with so many digits are mixtures. Maybe that is the mean, though that doesn't make sense. The lifetime of a mixture is not the linear interpolation of the lifetimes of the components. In any case, yes, there are too many digits. Gah4 (talk) 08:59, 1 May 2020 (UTC)

Value dissarangement!

There is obviously a big confusion of several listed values from R-511 to R-611 - somebody who is able to should fix them! Thanx!

Molecular masses at the column of normal boiling point temperature

It seems to me that for quite many compounds the molecular mass is in the column of normal boiling point temperature. Needs a lot of fixing! Thanks. — Preceding unsigned comment added by 62.78.193.63 (talk) 20:06, 28 October 2012 (UTC)

Just for the order sake: the values of molecular weight (those with (1) as ref.) should be moved to the left, and the values of boilng point (ref.2) to the correct column.

---

— Preceding unsigned comment added by 93.173.54.149 (talk) 20:15, 24 August 2013 (UTC)

Reverted to 5 July 2012 EmausBot edit

I reverted all edits to the EmausBot edit of 5 July 2012. The subsequent four edits scrambled the columns in a way that would be very tedious to manually fix. Most noticablly is the molecular mass column. The molecular mass column is OK for the first 20 lines or so. Jim1138 (talk) 04:06, 19 September 2013 (UTC)

Removed molecular mass uncertainty

Per suggestion of Material scientist, I have removed the molecular mass uncertainty and reduced the mass precision. The mass uncertainty would not be useful except to someone doing extreme precision experiments. The experimenter would be referencing literature and not Wikipedia for this information. As the uncertainty and extra precision bloats the article and makes it difficult to read and maintain, I have removed it. Jim1138 (talk) 08:27, 19 September 2013 (UTC)

R-723

Hi,

You might want to add R-723 (Ammonia-dimethil-ether)

Ákos — Preceding unsigned comment added by 109.74.55.49 (talk) 09:02, 20 January 2014 (UTC)

Hydrocarbon Refrigerants

There is no mention of hydrocarbon refrigerants - R170 (ethane), R290 (propane), R600/600a (butane/iso-butane).

Alongside the relevance of these refrigerants for general subject coverage, HC Rrefrigerants are, in many cases, superior refrigerants to others mentioned in the article, particularly with regard to performance, cost, availability and environmental impact, which appears to be a key focus of the current article:

Hydrocarbon refrigerants have GWP's only a tiny fraction of the HCFC/HFC refrigerants.
Do not damage the ozone layer as do CFC's.
More thermodynamically efficient than HCFC.
Much lower toxicity than CFC/HCFC.
Compatible with most existing systems; (R12, R22, R134a, R404A, R407C, R502, R600a).
Lower head pressure is gentler to equipment.
Compatible with all refrigeration lubricants, including synthetic and mineral oils.
More readily available than alternatives.
Cheaper than alternatives.

• http://content.hychill.com/
• http://www.oz-chill.com/about-us/why-hydrocarbons/
• http://hvac-talk.com/vbb/attachment.php?s=278b1cb5bbdd617f6f1bc6dc8a417655&attachmentid=489341&d=1400183633
• http://ec.europa.eu/environment/ozone/pdf/danfoss_r290.pdf

Airophile (talk) 03:04, 21 December 2015 (UTC)

@Airophile: R-170, R-290, R-600, and R-600a are all there. You have to scroll down. Searching doesn't seem to work because of the coding. Cheers Jim1138 (talk) 10:15, 21 December 2015 (UTC)

There are mention of them in Natural refrigerants too. 2A02:168:F609:0:5F8:C25A:2F16:ECD5 (talk) 20:59, 27 June 2019 (UTC)

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Cyclopentane

I know Cyclopentane is pretty popular is freezers in Europe. I see many ice cream freezers with C2H10, which almost certainly is Cyclopentane. I did also some literature on this topic, but no R-X designation. Obviously it is highly flammable, and do have properties somehow close to isobutane probably. I also know Cyclohexane is in use sometimes. 2A02:168:F609:0:5F8:C25A:2F16:ECD5 (talk) 21:07, 27 June 2019 (UTC)

C5H10 could also be an isomer of pentene, the alkene. I thought cyclopentane would have too high a boiling point for the usual refrigerants, but maybe useful for some high temperature systems. Gah4 (talk) 07:11, 26 May 2020 (UTC)

Many refrigerators and freezers in Europe have a huge "cyclopentane", or "pentane" writing on the back. That's not the refrigerant. That's the blowing agent for the insulating foam. Most refrigeration systems run on R600a. Cyclopentane, cyclohexane and pentane are unsuitable for a sub-zero °C refrigeration. 77.255.178.110 (talk) 22:44, 22 November 2024 (UTC)

trademarks

I thought that there were other trademarks, used by other companies, for refrigerants, but I can't remember them. Gah4 (talk) 07:12, 26 May 2020 (UTC)

olefins

Should olefins have names like ethylene or like ethene? Whichever one is the IUPAC name, as the column header says, should be used consistently. Gah4 (talk) 02:59, 7 February 2021 (UTC)

R-448a

The molar mass claimed by this page and by Honeywell is about twice what refprop claims. In addition, it's about twice what similar mixtures have. I've notified Honeywell of this.Not even Mr. Lister's Koromon survived intact. 20:14, 31 January 2022 (UTC)

It looks like Honeywell have the correct figure on their datasheets, but not on the page that was being used as a reference in this article. I've swapped the citation over to the datasheet and corrected the number used in the article. Sellyme^Talk 20:19, 27 September 2024 (UTC)

GWP values - AR6

The GWP100 values come from mixed citations [2,3,4,9,15,21,23,52,56,65,66] and educated estimates [c,g]. Many, though not all, numbers are outdated compared to AR6 Table 7.SM.7 https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Full_Report.pdf

I propose to update the GWP100 values based on AR6 for all pure refrigerants covered by AR6 Table 7.SM.7. A recalculation of the blend GWP100 values would also be needed.

An option is to add the GWP20 values simultaneously, in a column to the left of GWP100, as also done in the AR6 report table 7.SM.7, but I would do that in a separate edit so it can be discussed separately. Mwoc87 (talk) 08:38, 20 September 2023 (UTC)

Mass fraction instead of Mole fraction

For most refrigerants the composition is written as a mass fraction. This should be indicated in the table header as it is not a detail. The composition for air was entered as a mole fraction and should be converted. 92.40.212.161 (talk) 13:53, 21 December 2023 (UTC)

Boiling point of R-744 (CO2)

I'd guess most readers are looking at this column as a heuristic for practical mininum low-end temperatures, so have changed the value from -78°C to -56.56°C with a note, under the assumptions that most most people looking at this list are looking for a closed-loop fluid and want to avoid operating in a regime with dry solids.

If this is mistaken it should be reverted; if there are common-but-not-universal systems which use dry solids, perhaps both values should be listed; if there are other substances which have high sublimation pressures perhaps they should be similarly modified. BoilingLeadBath (talk) 18:25, 28 April 2024 (UTC)