by Andre Patenaude | Jan 23, 2024 | Efficiency, Efficiency & Refrigerant Regulations, Refrigerants
This is post four of CO2 as a Refrigerant, a blog series covering the fundamental considerations and characteristics of CO2 as a refrigerant (R-744). Depending on the climate, many R-744 booster systems operate above the critical point in supercritical mode) for a...
by Andre Patenaude | Jan 23, 2024 | Efficiency, Efficiency & Refrigerant Regulations, Refrigerants
In the fifth post in this CO2 as a Refrigerant blog series, I will overview the potential hazards associated with handling systems in which R-744 is used. Although R-744 is non-flammable, its high pressures, toxicity in high concentrations and potential for dry ice...
by Andre Patenaude | Jan 23, 2024 | Efficiency & Refrigerant Regulations, Refrigerants
In post seven of our CO2 as a Refrigerant blog series, I will weigh the relative advantages and disadvantages of R-744. Weighing the Advantages and Disadvantages of R744 Table 1 outlines the advantages and disadvantages of R-744 as a refrigerant. Although the list of...
by Andre Patenaude | Jan 23, 2024 | Efficiency & Refrigerant Regulations, Refrigerants
In post nine of our CO2 as a Refrigerant blog series, I explore the emerging potential for CO2 single-stage systems in commercial refrigeration and/or retail settings. Introduction to retail CO2 systems The diagram in Figure 1 depicts a simple CO2 single-stage system,...
by Andre Patenaude | Jan 23, 2024 | Efficiency & Refrigerant Regulations, Refrigerants
In post 10 of our CO2 as a Refrigerant blog series, I examine the most common and widely adopted CO2 commercial refrigeration system: CO2 booster. Because of R-744’s high discharge temperature and high differential pressures, a two-stage compression strategy is needed...