I am solving a thermodynamics problem with Refrigerant 22 I

I am solving a thermodynamics problem with Refrigerant 22. I am having trouble using the tables to find the missing enthalpies, temperatures, pressure, and volume. For example, I have at process 3: T= 100 F and p=225 lbf/in^2. I want to know what state this is in (saturated, compressed liquid, saturated vapor/liquid). I looked at Saturated Ref. 22 table and found that at 100 F, P(saturated)=210.69. Since this is less than 225 I would assume that it is a compressed liquid... but there is no compressed liq. table for Ref 22??? How do I find enthalpy, h???? I thought maybe it could be superheated vapor but the table has no 100 F and 225 lbf/in^2 value and I don\'t see how I\'d use the superheated vapor table to find it.....

Solution

It actually depends upon the process it follows. The state of the liquid present at that point. For Example ; Refrigerant leaving compressor is Saturated Vapour and after condensor is saturated liquid. These are the assumptions we take to solve the problems.

process 3: T= 100 F and p=225 lbf/in^2 :

Clearly it is a subcooled liquid but to determine the accurate states or property values at this state extra information should be provided with the question . Either the process is adibatic or Isochoric etc or mentioning the quality of water .

By cheking the tables , this state is not Superheated vapour as the data doesnt exit.

So it can be either Sat. Vapur or Sat. Liquid or Sat. Liquid + Vapour .

To determine this we need to know the outcome of the previous process .