COC of Cooling Tower

[Giuss]

I am working out a EIA for a new thermal power plant in India. For the make up water of the cooling tower sea water which would be desalinated and clarified to a tds content of 32,000 ppm will be used.

The common practice of operation of cooling tower indicates a COC (Cycles of Concentration) of 5-6 with non-sea water.

If I use clarified/desalinated sea water somebady is telling me that COC will be limited to 1,5 max. Is this correct?

In this case the volume of make up water will be much more and the water plant design will be affected.

Can somebody help me ?

 

[bimr]

Those COC numbers are good starting points. There may be some optimization during project design, but those numbers are good.

 

[25362]

Do you know the chemistry of the desalinated and clarified sea water ? At first sight the recommended COC seems a practical approach, although it will evidently be costly on the treating chemicals and make up water (as you say) resulting from the blow down.

 

[rmw]

Who is this "somebody"? What is his/her qualifications to make such a statement. Have you asked this of a qualified cooling tower chemicals vendor? What are the metallurgie(s) of the affected heat exchange equipment, assuming that that would be the normal list of condensers, coolers, etc normally associated with thermal power plants?

rmw

 

[bchoate]

Refer to the following: Cycles of concentration are based on TDS and chlorides.

http://www.eng-tips.com/faqs.cfm?fid=1152.

The comments about materials of construction are pertinent also.

 

[Giuss]

The limitation of COC is an enviromenatal restriction mainly.