In a recent announcement, Scotland-based Star Refrigeration is offering training in that regard through its Star Learning Solutions program. It is a two-module Continuing Professional Diploma (CPD)-certified eLearning course on CO2 as a refrigerant in refrigeration. It is accessible online through www.i-know.com.
The first of the two 40-minute modules is called CO2 Refrigeration Fundamentals. It is an interactive flash movie that includes video presentations and reference material. The module describes CO2 and how it can be used as a refrigerant, its different grades, and the existing phases of the gas at different pressures and temperatures.