Worcester Polytechnic Institute Cooling Plant Improvements Gordon Library –New Carrier screw chiller, downsized to 170 tons –0.62 kW/ton (down from 0.85 kW/ton) –R-22, HCFC refrigerant, with oxygen depletion sensors Fuller Laboratory –Added 200 ton cooling tower and heat exchanger  free winter cooling during 5 months of the year  eliminates chiller freeze ups  cooling tower loop separated from chilled water loop by the heat exchanger
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