4 replies to this topic

[mbsahg]

Hello

 

I am trying to form ethylene storage system.

But I didn't find about cool-down method from tank and piping.

I think that fast cool-down will damage to piping.

Initial piping temperature assumed 15 deg C.(Ambient Temperature)

I want to know about cool-down method.

 

I can't speak  English well.

Thank you for reading message.

 

[Art Montemayor]

I don't know what you mean to say by "forming" an ethylene storage system.  Maybe it's your English that is the problem.

 

However, your English use has nothing to do with your failure to tell us the conditions under which you plan to store your ethylene.  I have to guess that you mean to store the gas as a LIQUID, and that involves cold (probably cryogenic) conditions.  If that is the case, then the mechanical design will dictate the rate of cool down (and warm up) that you can employ safely.  If you are designing the mechanical system, then that responsibility falls on your shoulders.  If not, then your engineering contractor should furnish the instructions to you.

[mbsahg]

Thank you for read my post.

 

I think that my post lacked about description of process. (because I was impatient.)

The project is designed cryogenic storage system.( at 0.1kg/cm2g saturated)

My client want to submit report of rate of cool down.

But I didn't find about rate of cool down.

If you have experience about rate of cool down, I want  to learn it.

Do process engineer have to calculate  about rate of cool down?(I am process engineer.)

Also, I attached PFD file.

 

 

 

Attached Files

•  ETHYLENE TANK PFD.pdf   87.25KB   97 downloads

Edited by mbsahg, 20 March 2014 - 08:01 PM.

[Art Montemayor]

The design, fabrication, and erection of a cryogenic tank is such a specialized engineering challenge that it is seldom - if ever - left to a process engineering contractor to undertake it.  There are few companies world-wide that will undertake such a venture, and it is left up to them to do the tank portion of a total project.  I seriously doubt that you would be selected to do the cool down calculations and procedures for such a specialized job.

 

As I have stated, it is clearly in the tank designer's scope of work to calculate and specify the cool-down (as well as warm-up) procedures and hazards for the specific tank that are applicable to all the processing and operational requirements of the client.  Unless you work for the tank designer and fabricator company, you are out of this picture.  If you are in the processing arm of the tank company, then I would expect you to coordinate all your process design needs and specifications closely with the mechanical engineering portion of the company - especially the pressure and vacuum relief requirements.

[mbsahg]

Thank you!

 

I was learned from your help.

Thus, I will request about rate of cool down to fabricator company.

I can't express thanks because I can't speak  English well.