Temperature Calculation for Gas Expansion

[DingWeiyang]

Hi All
Found a thread about the temperature calculation for gas expansion(high pressure gas thru a signle stage pressure regulating valve),e.g. Pi=1000psig, Po=60psig,Ti=300K,To=?.

reference: thread124-86992

is there anybody can provide the manual calcs process sample? it seems only some software like Aspen or Hysys can provide the result, i prefer to have manual calcs for study myself if its available.

Thanks
Ding

 

[Latexman]

What was wrong with the answers last time you asked this: thread135-379793

It is also in your thermo textbook, or have you not taken that class yet?

Good luck,
Latexman

Technically, the glass is always full - 1/2 air and 1/2 water.

 

[DingWeiyang]

Hi Latexman

Thanks for your remind, i actually have the answer from software(Aspen), and i tried to test the correction by manual calcs, its shame that my calcs failed. Its the reason i raise it again.
The thermodynamics lessons were really not that good myself, and i didn't touch it for years.

Anyway, i'm still trying. please ignore the thread if its really bother you.

Regards
Ding

 

[apetri]

DingWeiyang,
as noted by Latexman, you got a detailed answer in previous thread

"

http://www.eng-tips.com/viewthread.cfm?qid=379793"

the answer includes a solution calculated with Prode Properties (see

http://www.prode.com)

Prode Properties returns about -70C
(solving a flash H1 = H2 with P1 = 100 Bar.a, T1 = 15 C, P2 = 6 Bar.a for Silane) with a partial liquid fraction...

as suggested in previous thread you can use a mollier chart to verify those values...

 

[DingWeiyang]

Hi apetri

Thanks for your remind, i noticed. its clear to my now.

Regards
Ding

 

[Latexman]

DingWeiyang,

I'm sorry. I jumped to the conclusion you were a student. My mistake.

Good luck,
Latexman

Technically, the glass is always full - 1/2 air and 1/2 water.

 

[DingWeiyang]

Latexman

Its OK, everybody is a student when they ask the question, and everybody is a teacher when they provide the answer, method or solution.
so, you're right.
i appreciate that you still remember the issue i have.


regards
Ding