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Hi
I am sorry if this issue has been covered elsewhere and would be grateful if could you point to the relevant thread but I would be most grateful for opinions as to what refrigerant is suitable for replacing R-22 in domestic air conditioning systems?
Many thanks
H20eng
I've tried a few and R417a seems to be the best in my opinion
:Dive also used r-417a loads of times . seems to be a good option , haven,t had any problems with ih so far:DQuote:
Originally Posted by H2Oeng
Have used R417A, it seems to work well. Use approximately 90% by weight when compared to R22 weight. No need for oil change. System pressures should be very similar to those of R22.
On small domestic split units it might not be a big problem, but there is not enough miscibility/sollubility of these new "drop ins" with MO.
I can email a case study of a comparative in a 600Kw water-water chiller with 2 cicruits, one retrofitted to R407C and the other to a "drop in" to whom may interest.
Regards,
Nando.
:off topic: Hi Nando, have a possible retrofit coming up & i'd be interested in seeing this case study if you could up-load it or post a link.. Thanks...
Sorry, I can't upload it due to its big size.
I will be happy to email it to whoever asks for it.
Regards,
Nando.
Definitely a problem on bigger systems, if there are no oil seperators installed i would advise oil swap to POE!Quote:
Originally Posted by Fri3Oil System
on that case, you should clean and remove the remaining MO.Quote:
Originally Posted by jsp
I have a link to a brief summary of the report I mentioned. It's in Spanish, but results can be easily identified. I hope it helps:
www.fri3oilsystem.com/hitecsa.zip
For the whole case study(English), I should email it unless any of the administrators give me a solution. :)
Regards,
Nando.
I managed to upload the case study to my website, now you can download it from there:
www.fri3oilsystem.com/retrofitcase.zip
I hope you find it interesting,
Regards,
Nando.
i am doing a study, so can anyone please tell me how to theoretically calculate a refrigerant's efficiency??
coz the cop of a refrigerator is just t2/(t1+t2), this only accounts tem,perature. can any1 tell me how to account for different refrigerants?
thank you
Rs-44 :)
Isceon 49/R143A, or MO49/MO49+ in North America, a good drop in replacement for R12, and R22 systems. And they will work on any type of oil.
I have a link for the dupont refrigeration website, but it won't let me show it because my posts counts aren't up to 15 yet.
There is a new refrigerant from Honeywell that has been developed which looks promising as a replacement for R22. It's called Performax LT (hasn't been designated an "R" reference yet). I can't post URL's yet but a quick Google should point you at the relevent page onthe Honeywell website.
Update: ASHRAE have designated it as R407F and it is readily available from A-Gas in the UK.Quote:
Originally Posted by smc200276