On January 30, 2018 Greg Robison took the floor at IPPE’s Environmental Conference for the Meat and Poultry Industry to discuss the advantages of using CO2 Cascade Systems in industrial refrigeration applications. Throughout his discussion, he outlined the advantages of choosing a CO2 Cascade System for relevant applications, including cold storage and spiral freezers. Some of the advantages include a low ammonia charge, fast ROI, energy efficiency especially at low temperatures, increased product throughput and environmental sustainability.
Robison continued on to explain that the reduced ammonia charge leads to lower PSM costs compared to a typical Single or Two-Stage NH3 system, that there is no ammonia present in the food area and that maintenance costs are lower for CO2 Cascade Systems. He then walked through examples of installation cost based on a comparison of piping to a typical Two-Stage NH3 system. He highlighted the energy savings of a CO2 Cascade System vs a Two-Stage NH3 System that was shown in a study conducted by an independent third party, and discussed the differences of the two systems with full and partial loads at different evaporating temperatures.
Overall, the main point that Robison focused on was that CO2 is a reliable and sustainable natural refrigerant with many benefits for the environment as well as the end user. It is non-hazardous, non-flammable and inexpensive when compared to other refrigerants. He concluded with an example of M&M Refrigeration’s system installation in a Mexican Cold Storage facility (full article can be found here).