A conventional mechanical refrigeration system is considered what type of system?

A conventional mechanical refrigeration system is classified as a closed loop system because it operates by circulating a refrigerant through a sealed circuit of components including evaporators, condensers, compressors, and expansion valves. In this system, the refrigerant absorbs heat from the environment inside a space and releases it outside, all while remaining contained within the system. The key characteristic of a closed loop system is that the working fluid does not exchange with the surrounding environment, enabling efficient heat transfer and maintaining constant pressure levels throughout the system.

This structure allows for effective temperature control without mass loss of the refrigerant, which is integral for the reliable operation of refrigeration systems. Understanding this concept is vital for troubleshooting and maintaining efficiency in refrigeration operations.