3 replies to this topic

[yl4896]

Hi all,

I am looking at the air dryer for compressed air system and thinking to propose to purchase one

But can anyone help on how we can calculate the return on investment and pay back period of the air dryer, probably the refrigeration type??

Meaning how much cost savings we will get when we install that air dryer to our existing compressed air system which is without air dryer.....


Thanks

[Padmakar Katre]

Dear,
What do you mean by refrigeration type of air dryer? Are you looking for an air dryer as instrument air utility system or the for the air separation unit? Unless you specify the project background, it will be hard for others to comment on your drier. Using alumina bed dryers is the common practice in industry. Please come up with some further inputs so that we can reply accordingly.

[chemsac2]

Attached file contains comparison of costs of few options in Indian Rupees. You can convert it into your currency based on conversion rates for approximation if required.

Also, attached is vendor catalogue for refrigerant type air dryer.

However, please note that dew point achievable with refrigerant dryer is little high. Since you do not have a dryer presently, this dryer would be a bonus, but may fall short of actual industry specification fir air dew point. Another file attached gives comparison of few methods available.

Regards,

Sachin

Attached Files

•  8. Refrigerated_Air_Dryer.pdf   125.17KB   54 downloads
•  15. Air_Dryer_Cost_Comparison.doc   52KB   36 downloads
•  Dryer_Comparison.doc   158.5KB   41 downloads

[Zauberberg]

ANSI/ISA– 7.0.01 (Instrument Air quality standard) says: "The pressure dew point as measured at the dryer outlet shall be at least 10°C (18°F) below the minimum temperature to which any part of the instrument air system is exposed. The pressure dew point shall not exceed 4°C (39°F) at line pressure."

According to ISA 7.0.01 (attached below), Refrigerated systems are capable of achieving dew point between 2-10 degC, depending on the package flow rate.

So, before comparing costs for different air drying units/technologies, make sure that they are ALL applicable to your system and capable to meet dew point requirements. Otherwise we are mixing apples and oranges.

Attached Files

•  Air Dryers.pdf   27.13KB   59 downloads