Hydrofluoroethers as low temperature refrigerants

Details Hydrofluoroethers as low temperature refrigerants Hydrofluoroethers as low temperature refrigerants

1996-10-16

1998-02-03

Tapoical, William E.

Refrigeration

Processes

Employing diverse materials or particular material in...

252 67, C09K 504

Patent

active

057132119

ABSTRACT:
A method and apparatus are provided for using certain hydrofluoroethers (HFEs) as low temperature heat transfer media in secondary loop refrigeration systems. These materials exhibit a low, somewhat linear Temperature Difference Factor over the temperature range of -15.degree. C. to -65.degree. C., making them ideal for use as low temperature heat transfer media. The HFEs of the present invention are nonflammable, nontoxic, environmentally benign, and have a high heat transfer capacity and low viscosity over the required operating temperatures. Furthermore, since these materials have high boiling points and low freezing points, they are not prone to phase changes over the required operating temperatures, and do not require pressurized systems.

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