by Andre Patenaude | Jan 23, 2024 | Efficiency, Efficiency & Refrigerant Regulations, Refrigerants
In post eight of our CO2 as a Refrigerant blog series, I provide an introduction of leading CO2 commercial refrigeration architectures, including: booster and cascade systems. Reviewing the application considerations for R-744 As I’ve explained in previous blogs in...
by Andre Patenaude | Jan 23, 2024 | Efficiency & Refrigerant Regulations, Refrigerants
This is post two of CO2 as a Refrigerant, a blog series covering the fundamental considerations and characteristics of CO2 as a refrigerant (R-744). When selecting any refrigerant, stakeholders must carefully consider multiple factors, including: cooling capacity,...
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 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 Eric Grilliot | May 31, 2022 | Solutions Spotlight
The use of fixed-speed (or fixed-capacity) refrigeration systems and HVAC rooftop units (RTUs) is a common strategy in the U.S. food retail sector. If you went into the machine rooms of most grocery stores, you likely would find centralized, direct expansion (DX)...