Continental used to build me 300, 400, and 500 ton air cooled
Doesn't anyone do that any more? No one builds them that big?
I used to use 300 or 400 nominal-ton air cooled condensers on 200 HP low temp chillers - to compete with water cooled. Some jobs didn't have the water for towers and so forth. I just set the fan controls to maintain a 90-100º condensing temperature.
PHM
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Originally Posted by
icemeister
As I recall, multiplex was a term coined by Hussmann back in the 1960's for systems with multiple circuits. They were usually parallel compressor racks but could also refer to a single compressor, multi-circuit "rack" unit they made back then.
Compound systems to me are generally two-stage systems, although there could be more than just two stages. They can be either internally compounded or externally compounded.
As for air-cooled vs evap condensers, I think for systems in the typical supermarket the air-cooled makes the most sense. Larger systems need evap condensers just due to the higher condensing capacity requirements. Air-cooled condensers don't get much beyond 120 "nominal" tons sizewize.
PHM
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When faced with the choice between changing one's mind, and proving that there is no need to do so, most tend to get busy on the proof.