I am wondering if anybody here can give me some pointers on dry cooler (air cooled heat exchanger?) sizing for 500kW heat load. The brand doesn't matter, Liebert is fine but also noname. I want to get an idea of what size I am looking at so that I can estimate the real estate on our podium required, and pump size etc...

We have 20 stations with a 45 LPM (12 GPM) so total flow 900 LPM (240 GPM).

Total flow: 900 LPM / 240 GPM
Fluid is water (0% glycol)
Inlet Temp: 45 C / 95 F
Outlet Temp: 35 C / 113 F
Ambient temp: max 30 C / 86 F
Site elevation: Sealevel + 20m (3rd floor at coastal city)
RH: max 70% in summer

We would like to have a minimum of 2 dry coolers for redundancy. We also want to keep pressure drop low (there is already enough inside when we have to run the pipes to 20 stations).

Thanks a lot in advance, even if it's just basic information it will be very helpful. We are electronic guys but unfortunately on budget (who isn't) so we need to know what we need before we contact professionals.

Alex