8 replies to this topic

[Black Horse]

Dear All

Ii need some information about cooling tower performance check, using performance curve, calculation of cooling tower efficiency.

Any help will be appreciated.

Thanks,
sami

[THCooke]

I think the Marley Cooling Tower site has some good information...at least it did at one time.

[Bhavin Jambucha]

I am still confused... let me state my stand.

If we have to calculate the efficiency of a CT, considering the following equation

Range = Hot water Temperatur Inlet - Cold water temperature outlet
Approach = cold water temperature outlet - ambient air wet bulb temperature
Efficiency = Range / (hot water temperature inlet - ambient air wet bulb temperature)

i.e Efficiency(in %) = Range * 100 / (Range + Approach)

Then, where are the other parameters gone.

I mean the performance of a CT depends on so many other parameters like:
1) Flow rate for water in
2) Air flow in
3) The temperature level
4) Performance co-efficient of the packing to be used
5) Volume of packing
6) Type of water distribution
7) Type of cooling tower
8) Fan velocity, power

etc..
according to me some of these parameters has to be there in calculating the efficiency of CT.

Please can someone help me with this confusion.


Bhavin Jambucha
Engineer

[katmar]

Bhavin,

Basically, your 8 factors are what determine the appraoch that you can achieve. So you are correct that they all have an impact on the CT efficiency, but the measure of efficiency the way you have stated it is a good overall indicator of how well the tower is performing.

[Padmakar Katre]

Dear Just check some useful information here,
http://www.advantage...ntageFYI273.pdf
http://www.wapa.gov/...brf/cooling.htm

[Qalander (Chem)]

Dear Just check some useful information here,
http://www.advantage...ntageFYI273.pdf
http://www.wapa.gov/...brf/cooling.htm

Dear Sami,
May I humbally suggest that somehow the Most critical issue is the packing surface area and capability to provide fastest possible air induced evaporative cooling and minimum clogging.
These properties are very important for sustained efficient operation with minimum downtimes.
Best Regards
Qalander

[Jiten_process]

Dear All

Ii need some information about cooling tower performance check, using performance curve, calculation of cooling tower efficiency.

Any help will be appreciated.

Thanks,
sami

First plz make it clear. I am assuming that you are talking about performance evaluation of existsting cooling tower which is already in operation, right?

I would suggest there is one monograph available (GPSA Engineering data book, Vol. 1) where you can check your performance evaluation on already designed cooling tower with varying parameter. For example if your cooling tower designed on basis of some wet bulb temp., inlet water temp. and some specific flowrate and if these condition changes then what will be the effect on performance.

As far as efficiency concern, you may have the online temp. of inlet and outlet, find out actual wet bulb related to your site and calculate the efficiency as described above. It is that simple, i fill!

If you really fascinated to learn the designing of induced draft cooling tower, i have some doc. you may also see this online

http://profmaster.bl...culation-i.html

Hope above may turnout to be useful.
to be continued...

[Bhavin Jambucha]

First plz make it clear. I am assuming that you are talking about performance evaluation of existsting cooling tower which is already in operation, right?

I would suggest there is one monograph available (GPSA Engineering data book, Vol. 1) where you can check your performance evaluation on already designed cooling tower with varying parameter. For example if your cooling tower designed on basis of some wet bulb temp., inlet water temp. and some specific flowrate and if these condition changes then what will be the effect on performance.

As far as efficiency concern, you may have the online temp. of inlet and outlet, find out actual wet bulb related to your site and calculate the efficiency as described above. It is that simple, i fill!

If you really fascinated to learn the designing of induced draft cooling tower, i have some doc. you may also see this online

http://profmaster.bl...culation-i.html

Hope above may turnout to be useful.
to be continued...

Thanks a lot bro,
this really helped me out with my cofusion.

Bhavin