The following remarks were made regarding the article “Let’s Worry More About Refrigerant Leaks, Less About Metrics” written by Joanna R. Turpin, senior editor for The NEWS, published Sept. 3.
Determining which refrigerant may work best for an application can be challenging. While larger supermarket and restaurant chains usually have in-house personnel who help make this decision, they often turn to their local contractors for their advice as well.
Grocery store owners and managers are increasingly utilizing the IoT in order to monitor the performance of their refrigeration equipment, so they can take immediate action should a problem arise.
It is always best to find and repair the source of the leak. But depending on the size of the system and the size and location of the refrigerant leak, it may not be an easy or inexpensive repair.
Refrigerant floodback occurs when liquid refrigerant enters the compressor’s crankcase during the running cycle. Refrigerant floodback will dilute the compressor’s oil with liquid refrigerant, which will cause oil foaming in the crankcase, washing the bearings clean of their lubricating oil.
In supermarkets, where HVAC and refrigeration equipment use 50 to 60 percent of all electricity consumed, new technologies and advanced control strategies have been developed to help boost energy efficiency as well as reduce emissions.
Refrigerant regulations are another reason why change is coming, as HCFCs will be phased out by 2020, and given their high GWP, HFCs will likely be phased down in the near future as well. At some point, supermarkets will need to start considering low-GWP alternatives, such as HFO blends, as well as so-called “future-proof” refrigerants, such as ammonia, CO2, or propane.