Born to Freeze

Truly, every refrigerant is able to harm if not properly handled. But actually one of the feature which drives the fear toward carbon dioxide is exactly the one which is bringing the largest benefit: high pressure is frightening but is also the quality providing stunning heat transfer properties when CO2 is used into a refrigeration system. However high pressure shall not be frightening at all, because with an appropriate design a CO2 system is simple and safe, like every other system. And, though is working with higher pressures, a CO2 system uses smaller or similar pipe wall thickness to other systems, too ! Do you dare to unbelieve this? Just consider the following example. Let’s pretend I am the owner of a supermarket chain and I am planning to open a new small size point of sales requiring a total of 50kW refrigeration capacity, with 50 meters overall pipe length. When thinking about choosing R404A , my engineers have dimensioned the evaporators return lines to th...