Sounds like you're talking about two different measures of efficiency.
One is saying that R-410 is a more efficient *refrigerant* because it
provides more cooling per unit of refrigerant pumped around the system.
The other is saying that both *systems* have the same efficiency in
terms of cooling provided per watt-hour of electricity consumed.
By tranplanting a 410-A compressor of the same HP into an existing
R-22 system, and charging the system with 410-A and replacing the TXV,
the SEER of the system will be greater after the changes.
What this means is that R-410_A can achieve the same SEER by using a
physically smaller compressor (smaller because mass flow rate
requirement is lower) and smaller coils. Refrigerants can actually
be rated in efficiency (EER) compared to each other, and specifically
in regards to the application. They are correct, and you are wrong.
The problem is that they didn't know why they were right.
This is quite confused. Efficiency is a property of a refrigeration
system, not a refrigerant. It also varies with conditions. There is no
such thing as comparative efficiency of refrigerants, as opposed to system
efficiency under specific conditions.
You may be confusing refrigerant properties like molar heat capacity with
efficiency. R410a is "better" in that regard than R22, and worse in other
properties important to refrigeration. Which one performs better depends
on the systems employed and the operating conditions. You can cook up
examples where either outperforms the other.
Your trolling is getting a bit tiresome. Maybe if you got your nose out of
the books, and actually worked with these refrigerants and this equipment in
real life, you would have a better understanding of what we are talking
For the specific application where it is used, there is nothing worse
about 410-A. Whether we can cook up other applications where it is
worse is immaterial. There is probably some scenario possible, some
universe, where 410-A causes a planet to explode, but that would have
no bearing on the systems in which it is used on our planet in our
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