Abstract
In recent years, slurries of ice have been commonly used as environmentally-friendly secondary refrigerants because they provide solutions to such issues as establishment of uniformity in electrical loads, effective use of unavailable energy for use and savings in energy. In addition to ice-slurries, ice-water mixtures in slurry-state have also been put to practical use at temperatures below 0℃. A binary mixture such as a water-solution has a solid-liquid coexistent region where a solid phase coexists with the liquid phase. This solid-liquid phase can be used as a high-performance secondary refrigerant if it is possible to form a two-phase flow involving the two phases. Another possibility is that it can also be used as a natural secondary refrigerant because the constituents of the refrigerant are substances existent in the nature.
