12 replies to this topic

[Bal]

Hello,

 

Is there any difference between a fan and an air cooler?

 

Appendix A.1 for calculating the purchased capital cost in Turtun (Analysis, Synthesis and Design of Chemical Processes) shows two different categories for fans and heat exchanges (where air cooler is a type of HE). 

 

Thanks!

[fallah]

Bal,

 

In brief, a fan is an equpment which delivers a little bit pressurized air but an air cooler is an air cooled heat exchanger included a fan which generates a forced draft for passing air, as cooling media, through the tube bundles contain moving process fluid...

[Bal]

How would you calculate the electric power required to operate the air cooler then?

[breizh]

Hi ,

Take a look at the document attached , it should help you

 

Breizh

[fallah]

How would you calculate the electric power required to operate the air cooler then?

 

Bal,

 

As a quick estimation, fan horsepower in an air cooler varies to the 2.75 power of the required air mass velocity...

[malcolmbutler]

So would you say that an air cooler is always considered a fan? Basing that question off of your first comment.

[fallah]

So would you say that an air cooler is always considered a fan? Basing that question off of your first comment.

 

malcoimbutler,

 

An air cooler is always included a fan...
 

[shan]

Natural draft air cooler, which is my invention today.  May be patented before the office close for Thanksgiving.  It is not impossible if you have large enough surface area and/or high enough chimney.

[fallah]

A device through which the cooling action is performed by moving air generated due to natural draft is a huge equipment normally titled Dry Type Cooling Tower...

[srfish]

There are air coolers without fans. Here in the mid-west we call them wind coolers. For more information on these, refer to the "Process Heat Transfer 1.04 spreadsheet located in this web site.

[cea]

Bal,

 

Following formula may be used to calculate power consumption by fan cooler =

 

Air flow per fan (cu.ft/min) x Differential pressure across tube bundle (inWc)

(6356 x Fan efficiency x Gear Box efficiency x Motor efficiency)

 

Hope, this will help.

[Padmakar Katre]

Hi,

I will recommend you to discuss this with fan vendors for more clarity. HTRI ACE module has fan database which can be also helpful for preliminary assessment.

[Napo]

Bal,

 

Aslo, You can review the article: "Simplified air cooler estimating" by J. E. Lerner, Hydrocarbon Processing, February 1972, p. 93-100.

 

Napo.