What does a cascade system achieve by using the evaporator of one refrigeration system?

A cascade system is designed to achieve extremely low evaporator temperatures by utilizing the evaporator of one refrigeration system in conjunction with another system operating at a higher temperature. In this arrangement, the first refrigeration cycle cools a secondary medium, which is then used in the second cycle to achieve much lower temperatures.

This setup is particularly effective for applications requiring very low temperatures, such as in the preservation of certain materials or in advanced scientific research. By layering the refrigeration cycles, the cascade system enhances the cooling capability compared to a single-stage system.

While lower energy costs, moderate evaporator temperatures, and standard refrigeration efficiency can be outcomes influenced by the setup, the primary function of a cascade system is to attain extremely low temperatures that are critical in specialized applications.