This measure is to add doors to open refrigerated case and make adjustments to the rest of the refrigeration system as needed to optimize performance with a significantly reduced thermal load. Specifically, adjustments might be upgrading or modifying expansion valves, adjusting superheat and/or re-configuring compressors in some instances.
The measure saves energy by reducing infiltration in open-cases. Adding a door to a refrigerated case reduces the refrigeration load by about half and also reduces the heating load of the store (air conditioning load increase is also accounted for). Although uncommon, anti-sweat heater load savings penalty is significantly reduced by requiring an anti-sweat heater controller with humidity sensing.
