Robati2024
Mechanical
- Jul 15, 2024
- 1
How to calculate isentropic temperature exponent and isentropic valume exponent for real gases? Kv Kt
I am using LEE KESLER PLOCKER method (LKO EOS)
I have found some calculation in mr. Ludtke handbook. I also read another book " thermophysical Properties of Fluids by Marc J. Assael" to verify my Mtlab code I use exaplme in above book on page 100.But my calculation doesn't fit with the resuils !
The example ask to find isobaric heat capacity for mixture of (0.766 C3H8+ 0.234 CH4)
For a) T=310k P=1.7Mpa
b) T=420 k P=13.7 Mpa
Book results: case a Cp=2.2 kj/(kg k.
Case b Cp=3.6 KJ/KG/K
MY CALCULATION a: [z=0.8056] CPa=2.2
b: [Z=0.6159] Cpb=3.42
Densities are (a,b) : 818.73 and 6.3694E+3
Lee kealer plocker method use simple and reference fluid. It also use binary itraction parameters Kij. For this case they are 1.113
Why my calculation are incorrect ?!
I am using LEE KESLER PLOCKER method (LKO EOS)
I have found some calculation in mr. Ludtke handbook. I also read another book " thermophysical Properties of Fluids by Marc J. Assael" to verify my Mtlab code I use exaplme in above book on page 100.But my calculation doesn't fit with the resuils !
The example ask to find isobaric heat capacity for mixture of (0.766 C3H8+ 0.234 CH4)
For a) T=310k P=1.7Mpa
b) T=420 k P=13.7 Mpa
Book results: case a Cp=2.2 kj/(kg k.
Case b Cp=3.6 KJ/KG/K
MY CALCULATION a: [z=0.8056] CPa=2.2
b: [Z=0.6159] Cpb=3.42
Densities are (a,b) : 818.73 and 6.3694E+3
Lee kealer plocker method use simple and reference fluid. It also use binary itraction parameters Kij. For this case they are 1.113
Why my calculation are incorrect ?!
