In globalFACT’s latest article, “What Happens When the Power Goes Out?”, we unpack the unique challenges in managing HVACR systems during power outages, and the best ways to mitigate them. Here’s a preview of the article, as seen in Winsight Grocery Business:
A power outage is difficult for any supermarket to manage even under normal circumstances. However, for stores operating equipment running on next-generation, low-GWP fluorinated refrigerants, the system comes back on as soon as the lights do. More importantly, these systems hold their charge long after the power fails. No spoiled food, no system repairs and no extended store downtime. Many retailers take for granted how resilient and reliable these refrigeration systems are, and how much time and money they save as a result.
Conversely, retailers using CO2 (R-744) systems are not afforded the same peace of mind. To them, a power outage is rightly viewed as a potential catastrophe. Unlike the systems described above, CO2 systems often lose their charge when the power fails. This is because they operate at a significantly higher working pressure than traditional technologies. When the power is on, the system can ensure the pressure remains stable and operable. When the power cuts out, the pressure mitigation stops, and the system pressure climbs to an inoperable level. This triggers the loud screech of the emergency transcritical relief valve, which signals an imminent loss of charge and potential system failure.