Dear All,

I want to depressurize a compressor loop (including suction scrubber,compressor and its aftercooler), and I need to know about the following items:

1.How can I define the settle out pressure without the compressor performance? Can I use the discharge pressure instead it as initial pressure?

2.Should the Design Pressure of the suction scrubber be set according to the settle out pressure of the compressor? Does it depend on the type of compressor?

Best Regards,

ebrahimy54@yahoo.com

You may base on maximum possible pressure (e.g. 105% of normal pressure) of suction and discharge side and physical volume of suction and discharge side to calculate your settle out pressure.



Yes. You can set your design Pressure of the suction scrubber according to the settle out pressure of the compressor with necessary margin. Don't think it depend on type of compressor but the size of compressor may have same impact.

[quote]1.You may base on maximum possible pressure (e.g. 105% of normal pressure) of suction and discharge side and physical volume of suction and discharge side to calculate your settle out pressure.

Thanks for your kindly attention.
Please elaborate more about mentioned item,I can't understand how to calculate the settle out pressure in this manner.

look forward to hear from you.

Before the system is settled-out, there are 2 separate compartments with different inventory (M1 & M2) and physical volume (V1 & V2) at maximum possible operating pressure...

After the system is settled-out, 2 separate compartments will combine for single compartment with inventory (M1 + M2) and physical volume (V1 + V2)...

By trial-n-error, find a condition (P&T) where you will have the inventory of (M1+M2) and actual volume of (V1+V2)...

Can be easily setup using HYSYS, PRO-II, etc

Hope this help.