| 摘要 |
Heat transfer fluid mixtures and methods fo making and using same are presented. The inventive heat transfer fluid mixtures consist essentially of a light gas and at least one heavy fluid, which may be adjusted between a first composition having a high head transfer coefficient and high cost, and a second compositon having a lower cost. The heavy gas can be selected from teh group consisting of nitrogen, argon, carbon dioxide, and mixtures thereof, and the light gas can be selected from the group consisting of hydrogen, helium and any mixture thereof, the light gas having a concentration ranging from about 20 mole % to about 99 mole %. Method of colling or heating an item comprising the step of directly and/or indirectly contacting the item with the mixture of the invention, preferably the item to be cooled is an cylindrical optical fiber, which traverses through a substantially confined space, preferably the confined space is an heat exchanger. |
