E.i. Dupont De Nemours and Company

Mack McFarland

Barbara Haviland Minor

Thomas Joseph Leck

Donald Bernard Bivens

John Carl Steichen

An air conditioning or refrigeration system includes a secondary loop cooling system for use with a vapor compression system having a bypass line in order to bypass a reservoir in the secondary loop system. This bypass allows the air conditioning or refrigeration system to cool down more quickly. The secondary loop cooling system uses a non-flammable cooling fluid, which is particularly useful when the refrigerant used in the vapor compression system is flammable.

Secondary loop cooling system having a bypass and a method for bypassing a reservoir in the system

Disclosed herein are detectable refrigerant compositions, comprising from about 0.001 to about 5 weight percent tracer compositions, which are useful to identify leaking in a vapor compression refrigeration and/or air conditioning system. The presence of the tracers make the refrigerant compositions detectable by chemo/electro-active array, corona discharge, heated diode, electrochemical, photoionization, infrared, ultrasonic and electron capture detectors.

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West Grove, PA, United States of America

Mack McFarland