GWP for R410a ?

Hello,
Which is the only correct GWP of R410a?
Different manufacturers give different values.

Gasco say 2088
Dehon say 2088
PG7 say 2087,5
Danfoss (app) say 1980
Int.gas say (550+3400)/2=1975
Toshiba say 1975
Engineering say1725
emerson say 1725

Attachment 13965

Gerritt

I have literally just signed into this Forum to ask the very same question. I have 1980 or 2088 depending on who you look at. I clearly have not looked at as many resources as yourself. I also have two GWP numbers for R32 which are 550 and 675.

Can anyone provide clarity on this please?

No one can really answer your question.
By the way, What are the GWP units?? and ODP??

.

R410A is 2088

see

http://www.ior.org.uk/app/images/dow...%2030.5.14.pdf

All refrigerants are fully documented.

Rob

.

Quote:

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Originally Posted by chemi-cool

No one can really answer your question.
By the way, What are the GWP units?? and ODP??

---

Hi Chemi-cool

GWP is based on the unit 1 and C02 is the base unit gas, if C02 = 1 and
R410A = 2088 then 410 is 2088 times more polluting than C02.

It all goes back to the 1980's with Chlorine and ODP (ozone depletion potential)
All refrigerants were given a number representing the amount of Chlorine in them.
They were all based on the unit value of 1 and R12 had the most Chlorine so it
was given the designation unit of 1.

Any other refrigerant that had Chlorine in them were measured and the amount was given
as a 0. of the whole unit 1. R22 for example was/is 0.05 ODP, a fraction of the base unit 1
and therefore still considered not that bad a gas as far as ODP goes.

Rob

.

Thanks Rob.

Amazing how the powers to be switched their focus in the 80's 90's and oo's from Ozone Depleting Potential to our current Global Warming Potential. I'll let myself out. :off topic:

I think some of the discrepancies arise due to references to different IPCC assessment reports. The F-gas regulations use AR4 for calculations of CO2 equivalents. Under AR4, the GWP of R410A is 2088 and R32 is 675.

There is, however, a newer report, called AR5 (who would have guessed). This has reassessed the refrigerants' GWPs. So, just to confuse matters, some quote the figures from this report. R410A, for instance, is 1924 under AR5.

As Rob said, this document might help explain: http://www.ior.org.uk/app/images/dow...%2030.5.14.pdf

Thank you Neil. I have been discussing this with many industry experts for a few weeks now and your answer is very helpful.

Quote:

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Originally Posted by neil

I think some of the discrepancies arise due to references to different IPCC assessment reports. The F-gas regulations use AR4 for calculations of CO2 equivalents. Under AR4, the GWP of R410A is 2088 and R32 is 675.

There is, however, a newer report, called AR5 (who would have guessed). This has reassessed the refrigerants' GWPs. So, just to confuse matters, some quote the figures from this report. R410A, for instance, is 1924 under AR5.

As Rob said, this document might help explain: http://www.ior.org.uk/app/images/dow...%2030.5.14.pdf

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Thanks, I feel better now using 410A:D