[Fabrk8r]

newbieeng, define "quality" as you used it in your original post.

I am getting the impression that what you are asking is "how do i know what state the refrigerant is in (such as gas or liquid) in each component of the unit I am working on?"

Am I correct? If that is what you want to know, then you don't have to physically see the refrigerant to know it's state. As was said by mspanky, a temperature/pressure chart will tell you whether the refrigerant is in a gaseous or liquid state by using the correct refrigeration gauges.

If you are concerned with the actual quality of the refrigerant, then you would have to take a sample and have it analyzed. Seeing the refrigerant won't tell you if it's contaminated, although sometimes you can tell by the odor if there has been a problem within the system.

 

[Fabrk8r]

with the data provided by tranducers we can obtain its phase, quality, in shortly its thermophysical properties but in reality, it does not fit the actual one. That right there is Greek to me (I don't understand)

In the system there are a lot of losses. I can agree with this statement.

Flow characterization during the system on seems impossible using that kind of implementations (using transducers of temperature & pressure). My aim is to explain its characterisation simultaneously, without cut-off the system. Some methods for measurement of mass does not fit in that way.
More Greek. Thanks.

I'm sorry, but I don't think I can be of any assistance in this matter.