Re: Right Pipe dimensioning
Use 1/4" throughout the system. The internal volume of such small tubing is small enough that oil issues are unlikely.
You can also look into using R600a, which would decrease your operating pressures and make it even less likely for there to be any oil issues.
Re: Right Pipe dimensioning
But would that not cause the velocity of the fluid to be even lower than the one i already specified, and wouldnt that have negative impact on the system?
R600a is not an option, the customer will only accept R134a.
Regards
Woot
Re: Right Pipe dimensioning
I forgot to say that the pipes given is the outer diameter, and with a thickness of 0.75mm for the 3/16" pipe, and 0.7mm for the 1/8" pipe.
Regards
Re: Right Pipe dimensioning
1/4" is simply too small for oil issues to be likely.
Re: Right Pipe dimensioning
But according to CoolPack, the velocity with this pipe size, would be as follows:
Suction line: 2.1 m/s
Discharge line: 0.6 m/s
And the liquid line is so small that the program cant even calculate it,
I am sorry but i cant really understand how this would be sufficient?
Is it just because the pipes are so small that the fluid dont really need any velocity to drag the oil around, and thereby we can just choose an standard pipe? or is this wrong?
Regards
Re: Right Pipe dimensioning
The tubing is so small that it simply won't hold much oil. The liquid line is a complete non issue since the liquid refrigerant is a good solvent.
Re: Right Pipe dimensioning
okay, so for small systems, you simply skip the math and just go with some standard solution because it will be sufficient?
Wouldnt the there be any negative results of choosing pipes that are overdimensioned?
Regards
Re: Right Pipe dimensioning
From solken program , suction line 8 mm , discharge line 6 mm, liquid 6 mm .......