Kruse (1991) recommends cold condensed water for energy-efficient chiller operation.
This [sic] same data also points out that the capacity of a chiller is increased if the condenser water is colder. At the same time, the kW per ton is lower, thus increasing the efficiency and reducing the energy consumption. A 42_ chilled water system runs at 0.79 kW per Ton at 75_ condenser water versus 0.90 kW per Ton at 85_. This is a 12% savings. Clearly a strategy of running the cooling towers so as to make condenser water as cold as possible will save chiller energy. Be careful, however, not to exceed the manufacturer's recommendations.