Sometimes they mix and use those terms in case of single unit project such as simple separation column.
And in such a case, there is no difference between them virtually.
But in case of mega project consisting of various process and UT/OS units, it's totally different story.
Usually the FEED...
BigInch,
You are right if you are talking about "dynamic behavior"
of piping system with relatively small system volume.
But, as you know, most of our work is done on "steady
state" basis. And the question given by deccansher was not
about maintaining the constant pressure at...
As the pressure drop between two points are fixed, the total pressure drop is fixed.
And in this case, the total pressure drop constists of line pressure drop and control valve dP.
For example, assume that you have total pressure drop of 5 bar and control valve dP=2bar.
Available pressure drop...
ddkm,
I would like to use entropy instead of enthalpy.
Thanks to PropulsionAccess, saturated temperature for 30
bar will be around 234C(507K), and the 50 bar will be
around 264C(537K).
Assumed that same amount of heat is transferred from
steam system to atm, the entropy change will be...
Abiodun1,
As you do not give detailed information, I will do my own calculation here.
1) According to DEP 31.22.05.11(You mean Shell's DEP,right?)
LSL : > 150 mm
LSL to LAL : > 100 mm or 60 seconds holdup for control room and 5 mins for outside intervention.
LAL to LAH : Should be calculated...
ReliefGuy,
I have done similar calculation for Xylene Column before.
Here goes the results of that calculation
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Condenser Feed(normal drum vapor rate you mentioned) : 257351 kg/hr
Sengupta Method : 231022 kg/hr
Dynamic...
According to API 521 page 18,
"The recommended practice of finding a relief vapor flow
rate from the heat input to the vessel and from the latent
heat of liquid contained in the vessel becomes invalid near
the critical point of the fluid, where the latent heat
approaches zero and the...
