PDA

View Full Version : Different log ph for same refrigerant


Peter_1
16-10-2021, 12:11 PM
1599615997
How it comes the difference in the enthalpy for same refrigerant?
Glide
19-10-2021, 06:10 PM
Different gas manufacturer?
skarrs71
19-10-2021, 09:55 PM
bit hard to make out, can you point out the differences?
Peter_1
20-10-2021, 12:27 PM
bit hard to make out, can you point out the differences?

Enthalpy differs at a given pressure and temperature.. Just have a Quick look to the enthalpy scale of both
Brian_UK
20-10-2021, 12:52 PM
Enthalpy differs at a given pressure and temperature.. Just have a Quick look to the enthalpy scale of both
Unfortunately the two scales are just different levels of blur.
Rob White
20-10-2021, 01:09 PM
.

I think the HVAC one is wrong. the values are not the same as other comparators.

Rob
Peter_1
20-10-2021, 08:42 PM
Sorry, hitted the wrong button first...
I saw the same errors with R134a and R22 as well and found also errors in the calculation of Coolpack... Solkane and Coolselector gave same results where Coolpack gave complet different numbers when plotting and calculating a log p/h
seanf
20-10-2021, 09:28 PM
Could errors from unit conversions be a possibility?
Rob White
21-10-2021, 01:14 PM
Sorry, hitted the wrong button first...
I saw the same errors with R134a and R22 as well and found also errors in the calculation of Coolpack... Solkane and Coolselector gave same results where Coolpack gave complet different numbers when plotting and calculating a log p/h

I suppose we trust the information we are using at the time.
So if I was using Coolpack I would trust their numbers but I have sutle differences before with
different comparators but those two you have seem to be Bars out.

The most I have seen is a confusion between Gauge and Absolute.

Rob

.