This extrusion facility needed to add chilling capacity, and had a large capacity tower that could be incorporated into the system. The geographic location of this facility provided for quite cool water from the tower over a significant amount of the year, and the tower had a lot of excess capacity.

Advantage Engineering recommended that the company consider turning off the chiller at times, and using the colder tower water available during much of the year. This would translate to significant power savings over the course of a year.

Advantage Engineering provided a system that included a polyethylene pump tank for the tower water, and a water cooled central chiller. The piping diagram supplied by Advantage Engineering took into consideration the need to use tower water for part of the equipment, chilled water for the remaining equipment, and the ability to bypass the chilled water and use tower water when the ambient conditions were favorable.
 
This was a manual "Free Cooling" system that required the simple switching of a couple of ball valves to change from chiller to tower and vise versa when ambient conditions allowed. This is a 50 ton chiller, and so turning off the chiller turned off the 50 hp compressors as well as the 10 hp chiller pumps.