When the pressure is removed from the liquid, it rapidly be becomes a vapor that is much colder than the liquid. Now a mixture of cold liquid and vapor is coming out of the expansion device, getting ready to enter the evaporator and start the cycle over. The cost of existing quantities has risen sharply and their future availability is uncertain. Another solution is to stay with R-22 designs until firm recommendations are available from chemical suppliers and compressor manufacturers. Typical Applications Commercial refrigeration systems maintain cold and freezing temperatures for storing food and displaying it for self-service sales.
Food is stored in walk-in coolers typically located in the back of the store.
Display cases come in a variety of configurations and maintain different temperatures depending on what is being displayed. For convenience stores, and other smaller commercial applications, walk-in coolers have glass doors on one side to also serve as display cases. Table 1 shows the temperatures at which the cases are maintained for various types of products. A variety of strategies can be used to reduce refrigeration costs. Install on doors of walk-in cases or doorways of refrigerated warehouses.