Originally Posted by
brian_chapin
Well, there are positives and negatives associated with it.
On the east coast of the US here so usually we run two of our three evaporative condensers dry in the winter. One with water and vfd fans takes care of the load using the other two condensers for unusually high loads. Generally we have no problems in the winter keeping a head pressure of 120psig.
Positives: 1) Less water and water treatment chemical use. 2) Sump heaters can be turned off on the dry condensers. 3) In our situation we never have to worry about the remaining wet condenser freezing since there is always enough load to keep that water above freezing.
Negatives: 1) If something happens to the wet evap, it takes a while to get a dry one filled back up again. 2) Dry coils tend to have greater corrosion than wet ones according to most manufacturers.
It really depends on your load - this facility makes and stores ice cream and bagged ice so our load tends to drop off in the winter quite a bit.