ChE Forums: Relieving Temperature - ChE Forums

Jump to content

Community Message: When you receive recommendations for action in the forums, please return to the forum and share the results of your actions. What recommendations were implemented? What additional action was necessary? Tell everyone what happened so we can all continue to learn.

LEARN ABOUT OUR NEW FORUM SYSTEM HERE

Page 1 of 1

You cannot start a new topic
You cannot reply to this topic

Relieving Temperature

#1 puja

Newbie

Group: Members
Posts: 4
Joined: 29-March 07
Gender:Female

Reputation: 0

Neutral

Posted 17 April 2007 - 04:26 AM

Could someone help me calculate the relieving temperature of PSV.
PSV is on an acid KOD. OP-0.7 Kg/cm2g & OT=46 deg C. its mentioned in API that Relieving temp for gases is calculated as Tr=(Pr/P1)*T1.
but this law applies only for constant volume of gas. and in KOD considering Blocked outlet contigency we cant apply this law as no of moles of gas entering vessel inc with time.

Page 1 of 1

You cannot start a new topic
You cannot reply to this topic

Other Replies To This Topic

#2 senthil13

Newbie

Group: Members
Posts: 5
Joined: 17-January 08
Gender:Male
Location:Shanghai

Reputation: 0

Neutral

Posted 09 October 2008 - 12:48 PM

hello Puja,

i uses aspen hysys to overcome the same situation.. i was digging this issue for some times long back.. but one of my cleint solved it using the aspen hysys software.

I think you can do with aspen hysys..

If u r stuckup pls contact me..

#3 JoeWong

ChE Jedi

Group: Members
Posts: 1,211
Joined: 24-January 07
Gender:Male
Location:France

Reputation: 8

Neutral

Posted 09 October 2008 - 06:45 PM

This equation is ONLY for vessel contain GAS/VAPOR only. DO NOT USED for other scenario.

JoeWong
Chemical & Process Technology
------------------------------------------------------------------------------

#4 CMA010

Veteran Member

Group: Members
Posts: 43
Joined: 05-January 08
Location:The Netherlands

Reputation: 0

Neutral

Posted 10 October 2008 - 04:18 PM

QUOTE (JoeWong @ Oct 10 2008, 01:45 AM) <{POST_SNAPBACK}>

This equation is ONLY for vessel contain GAS/VAPOR only. DO NOT USED for other scenario.

Small addition, it's valid for the fire scenario of vessels containing gas/vapour.

What is the high pressure source in this case?

#5 sheiko

ChE Jedi

Group: Members
Posts: 225
Joined: 20-May 08
Gender:Male
Location:France

Reputation: 1

Neutral

Posted 11 October 2008 - 12:49 PM

QUOTE (puja @ Apr 17 2007, 11:26 AM) <{POST_SNAPBACK}>

To determine the relieving temperature during a blocked gas outlet scenario, i would use the polytropic compression temperature (or, to simplify, the adiabatic compression temperature).

"We don't believe things because they are true, things are true because we believe them"

Page 1 of 1

You cannot start a new topic
You cannot reply to this topic

Similar Topics

Topic	Forum	Started By	Stats	Last Post Info
Crude Oil Density Vs Temperature	Refining, Hydrocarbons, Oil, and Gas	Matteo Giorgio Marrano	13 Replies 6,741 Views	06 June 2009 - 11:13 AM By: JMW
Minimum Mechanical Design Temperature For Equipments. General	Industrial Professionals	msam	8 Replies 5,568 Views	21 April 2008 - 10:34 AM By: msam
Thermal Cracking Temperature For Hydrcarbon	Refining, Hydrocarbons, Oil, and Gas	JoeWong	3 Replies 2,824 Views	26 January 2008 - 01:41 AM By: smalawi
Blowdown Low Temperature Study	Chemical Process Simulation	kyle	4 Replies 371 Views	30 January 2010 - 12:15 AM By: kyle
Psv For Tube Rupture Case relieving rate calculation ( Interesting)	Relief Devices Forum	arvind	0 Replies 326 Views	23 September 2009 - 05:37 AM By: arvind