My inquiry is based upon reducing the energy consumption of a chilled water system which is being used in a manufacturing facility. The chilled water system is specifically used for the manufacturing process. The type of mechanical equipment used to chill the water is an air-cooled refrigerant chiller.

The thought is to add dry coolers to the chilled water system in order to take advantage of the local climate. The chilled water temperature needs to be maintained at approximately 45 deg. F (setpoint). The operation of the drycoolers would be sized for the full load of the mechanical chiller. Either the mechanical chiller will be on and the drycoolers off and vice versa.


1) Does an exceptional calculation apply for this case in order to show an energy savings for the process loads between the baseline and the proposed buildings, therefore improving the efficiency of the chilled water system?
2) If No, what is meant by "improvements to refrigeration equipment efficiency" mean as stated in the LEED v2009 Reference Guide?
3) If Yes, do both systems (chiller and dry cooler) require btu/ kW metering in order to prove the "specific energy cost savings as stated in the LEED v2009 Reference Guide?