4 replies to this topic

[pandarobot]

Hi,

i am trying to do the process design of a compressor that is to compress ethylene gas from atmospheric pressure to about lets say 30 bar.

 

the gas will also need to be stored on plant, 

 

what are the steps i'd use to go about this? including data and calcuations needed. if you could also refer me to books that could help i would appreciate it, thank you in advance for your help.

 

EDIT

Storage question not included any more, another thread will be raised for that as the answers were mainly geared towards the compressor part of the question. the answers were extremely helpful as well.

Edited by pandarobot, 09 April 2015 - 08:28 AM.

[Zauberberg]

Is it a continuous or intermittent process? What is capacity of the compressor? What is the min/max suction temperature? Do you intend to store gaseous or liquid Ethylene? Are there any contaminants in the gas stream? Which utility is available for compressor driver?

[pandarobot]

Is it a continuous or intermittent process? What is capacity of the compressor? What is the min/max suction temperature? Do you intend to store gaseous or liquid Ethylene? Are there any contaminants in the gas stream? Which utility is available for compressor driver?

Hi Zauberberg,

thank you for your reply

• the process is continuous 
• i'm not sure as to the answer of those questions, i thought the capacity of the compressor is the result you come up with after the calculations?
• how do i go about determining a minimum and max suction temperature
• it will be stored in the gaseous state
• there is a 0.05% impurities, but i might just simplify the problem by saying there are no contaminants.
• i'm not sure about what utility will be needed for this.

i am completely new to this, and was wondering if there were step by step instructions, in the design selection and sizing of a compressor.

[Bobby Strain]

If you are a student, start with a Mollier diagram for ethylene. It's all you need for your calculations.

 

Bobby

[Zauberberg]

In addition to what Bobby has said, see attached material - a simplified overview of sizing reciprocating machines (this will likely be the compressor type used in this service).

 

Below is the link for (probably) one of the most frequently referenced books in compression subjects. Hanlon's "Compressor Handbook", strongly recommended as reading material.

 

http://www.apvgn.pt/...book_hanlon.pdf

 

Attached Files

•  Compressor Selection and Sizing.pdf   75.38KB   34 downloads