Carbon dioxide (CO2) is not new to refrigeration systems. Alexander Twining proposed using CO2 as a refrigerant in a British patent granted him in 1850. Thaddeus S.C. Lowe, perhaps best known for his ...

EDITOR’S NOTE: This article is the first of a two-part series in response to the question: “Should I choose CO2 (R-744) for my refrigeration system?” It was prepared by engineers with M&M ...