What is the impact of increased coil frosting in refrigerated cases during high humidity conditions?

Increased coil frosting in refrigerated cases during high humidity conditions leads to an accumulation of ice on the evaporator coils. This frost buildup acts as an insulator, reducing the coils' ability to efficiently transfer heat. As a result, the refrigeration system has to work harder to maintain the desired temperature inside the refrigerated case, which leads to an increase in operating time. The system turns on more frequently or stays on longer to compensate for the diminished cooling capacity, ultimately decreasing overall efficiency. This situation is particularly pronounced in high humidity environments where moisture condenses and freezes more readily on the coils.

In summary, the presence of excessive frost restricts airflow and heat exchange, necessitating longer operating times and leading to a decline in overall efficiency.