2 replies to this topic

[hazy]

I've been a member for a while but this is my 1st post. Thanks in advance for your help.

We're having 2 cells of a 3 cell cross-flow cooling tower demo'd and rebuilt, 30,000 gpm total recirculation rate. The rebuild was supposed to be in-kind; however, I just found out that the new edck nozzles are 1 1/4" compared to the old nozzles at 7/8". In addition, there are ~150 additional nozzles with the rebuild. I'm concerned, 1) We'll never hold a deck water level, 2) The third cell will be water starved (it's an add-on for debottleneck).

Is there a calculation/spreadsheet out there I could use to check my vendor's design and try to determine what happened with the nozzle size discrepancy? My calcs show the total new nozzle area to be 2651 in^2 vs. 1212 in^2 for the old nozzles.

I have a bad feeling about this...

Thanks,
Rick

[hazy]

Kyle,

Sorry for the very late reply. We are putting 2/3 of the flow over 2 cells which is the same as previous. I received the tables that the vendor used to size the new nozzles and realized his design data which we supplied was old and incorrect. I had the tower manufacturer remove the 1 1/4" nozzles and replace them with the original size of 1". Hot water return deck levels have been very good post-startup with no issues.

Thanks again for you reply.

Rick