초록 ▼

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.,

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.

대표청구항 ▼

[ What is claimed is:] [1.] A refrigeration system, comprising:a display case for displaying refrigerated goods;.[.first.]. .Iadd.second .Iaddend.heat transfer means for transferring heat from said display case to a .[.first.]. .Iadd.second .Iaddend.heat transfer medium; and.[.second.]. .Iadd.first

[ What is claimed is:] [1.] A refrigeration system, comprising:a display case for displaying refrigerated goods;.[.first.]. .Iadd.second .Iaddend.heat transfer means for transferring heat from said display case to a .[.first.]. .Iadd.second .Iaddend.heat transfer medium; and.[.second.]. .Iadd.first .Iaddend.heat transfer means for transferring heat from said .[.first.]. .Iadd.second .Iaddend.heat transfer medium to a .[.second.]. .Iadd.first .Iaddend.heat transfer medium; wherein said .[.second.]. .Iadd.first .Iaddend.heat transfer means cools said .[.first.]. .Iadd.second .Iaddend.heat transfer medium to less than about -15.degree. C., and wherein said .[.first.]. .Iadd.second .Iaddend.heat transfer medium comprises an ether of the formula EQU R.sub.1 --O--R.sub.2 rein R.sub.1 and R.sub.2 are alkyl groups, and wherein at least one of R.sub.1 and R.sub.2 is at least partially fluorinated.