wonder refrigerant/cooling agent scores over any other on many accounts.
It evaporates directly without leaving any traces, provides 70%
more Kcal of refrigeration cooling than conventional water ice,
and is an ideal cooling medium for reducing temperature to as low
is obtained by direct fuel burning, or from by-product of boiler/furnace
flues, brewery/distillery fermenters, fertilizer gases or any other
sources. CO2 so obtained is purified. The purified CO2 gas is first
made into liquid, which is then processed to make dry ice.
ice is formed by allowing pure liquid CO2 under pressure to expand
to a reduced pressure. Because of Joule-Thomson effect cooling takes
place and 'snow' is formed. The snow is compressed to form blocks