What effect does excessive frost buildup on evaporators have on the refrigeration system?

Excessive frost buildup on evaporators leads to restricted airflow, which significantly hampers the heat exchange efficiency of the refrigeration system. When frost accumulates, it acts as an insulating barrier, preventing effective heat transfer from the air or fluid to the refrigerant inside the evaporator coils. This reduction in airflow can also impede the system's ability to absorb sufficient heat from the space being cooled, ultimately leading to decreased cooling performance.

The impacts of reduced airflow due to frost buildup can manifest in various ways, such as longer cooling cycles, increased energy consumption as the system struggles to maintain temperature, and an overall decrease in the efficiency of the refrigeration system. Additionally, excessive frost can lead to potential compressor issues due to low refrigerant flow, as the system relies on the proper heat exchange to function optimally. Hence, managing frost accumulation is crucial for maintaining a properly functioning refrigeration system.