Water-cooled chillers have higher efficiencies than air-cooled chillers
because they reject heat at the wet-bulb temperature (which takes into account
humidity and radiation), rather than the dry-bulb temperature at which air-
cooled chillers reject heat. They are also smaller than air-cooled chillers for
the same cooling output because its condenser requires less surface area and
does not use fans, which also significantly reduces noise levels (Fig. 3.6).
Figure 3.4 Water cooled chiller.
Figure 3.5 Cooling tower.
36 Smart Building Systems for Architects, Owners, and Builders