8 replies to this topic

[daraj]

Hi,

 

I am looking for reliable information on either actual costs or cost correlations for large scale gas centrifugal, (motor-driven or steam-driven or gas-driven compressors) compressors, typically used in large petrochemical plants. It is difficult to get such information just by  agoogle search. This information is needed to get ballpark estimates when doing preliminary feasibility studies on projects. Iam looking at comprssors with power requirements between 50 and 100MW handling mostly light hydrocarbon gases and with pressure ratios of 2 to 3.

 

Please let m eknow reliable source of information(either vendor quotes) or correlations which are reliable for this.

 

I need to know equipment cost as well as installed cost and the ratio between the two costs.

 

Your help isgreatly appreciated

[daraj]

No takers for this? Your inputs are needed please

[ankur2061]

daraj,

 

Ball-park cost estimates can be obtained with the attached cost estimation spreadsheet. You need to mention the year, the Marshall & Swift Index for the year and the USD to Euro rate to start the calculations.

 

Regards,

Ankur.

Attached Files

•  Equipment_cost_v1.xls   456KB   43 downloads

[daraj]

Thanks Ankur. do you know the underlying basis for those cost calculations? are they taken from some textbook?

 

also how reliable are they? (are they within 30-50% of actual costs?)

[ankur2061]

daraj,

 

One of the most popular cost estimation tools for chemical process equipment has been developed by Peters & Timmerhaus and the cost estimation calculations are well described in their famous book "Plant Design and Economics for Chemical Engineers". An online cost calculator is available at the following link based on the same book:

 

http://www.mhhe.com/...rs/data/ce.html

 

The attached spreadsheet in my earlier post is I believe based on the same methodology. You can compare the calculations from the spreadsheet and the online tool and arrive at some reasonable cost.

 

Regards,

Ankur.

[daraj]

oK THANKS

[daraj]

As I suspected these online tools do not have correlations for large scale compressors. They dont go beyond 6-10 MW, while what I need is 50-75 MW

[vsnlbom]

For turbine driven compressor consider 0.8 to 1 MMUSD per MW of ISO rating power.

[Napo]

Daraj,

 

You can review the information in the book: "Gas Machinery" by Lyman Scheel, Gulf Publishing Co., Houston, 1972.

 

I send you a chart of this book (p. 203).

 

Napo.

Attached Files

•  Centrifugal Compressor.pdf   296.28KB   25 downloads