Industrial refrigeration Rooftop ammonia evaporative condenser. Yellow pipes carry ammonia gas from engine room into the condenser; red pipes carry liquid ammonia to engine room.
CO2 sensors are at waist level ; ammonia sensors are on the ceiling.
Three brown containers are the cascade condensers, where liquid ammonia evaporates, cooling CO2 gas into a liquid. Blue surge drums hold liquid ammonia at 11째F before it enters cascade condensers.
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Accelerate America April 2015
Glycol is heated in the ammonia compressors and used to warm the subgrade under concrete to prevent frost heave.