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CO2 as a Refrigerant — Criteria for Choosing Refrigerants

This is post number 2 of a series.

How R744 meets different conditions and criteria

Table 1: How R744 meets different conditions and criteria

Multiple factors need to be carefully considered when selecting any refrigerant, including its cooling capacity, safety, environmental impact, ease of use, cost, and availability of components and expertise. Table 1 summarizes these and other key criteria, and shows how well R744 meets them.

In general, the table shows that R744 offers a more superior cooling capacity than conventional refrigerants while meeting the demand for a natural refrigerant with low global warming impact, but presents challenges in both its application and handling.

In the next post, we’ll look at the properties of R744 as a naturally occurring substance.

Andre Patenaude
Director – CO2 Business Development, Emerson Climate Technologies

Visit our website for additional information on CO2 Solutions from Emerson. 
Excerpt from original document; Commercial CO2 Refrigeration Systems, Guide for Subcritical and Transcritical CO2 Applications.

To read all posts in our series on CO2 as a Refrigerant, click on the links below:

  1. Series Introduction
  2. Criteria for Choosing Refrigerants
  3. Properties of R744
  4. Introduction to Trancritical Operation
  5. Five Potential Hazards of R744
  6. Comparison of R744 with Other Refrigerants
  7. R744 Advantages / Disadvantages
  8. Introduction to R744 Systems
  9. Introduction to Retail Transcritical Systems
  10. Retail Booster Systems
  11. Introduction to Retail Cascade Systems
  12. Introduction to Secondary Systems
  13. Selecting the Best System


2 Comments Post a comment
  1. It would be great if you had a link to share this with others. I’d like to post it on my LI group. I can of course cut and paste the link, but I think it’s more advantageous to you if I link to your LI group when I share it.

    May 2, 2015
    • Hi Keilly, You can use the LinkedIn Share button that appears just after the end of the post to accomplish that. It has an option to post straight into Groups. Hope that helps!

      May 6, 2015

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