Views: 0 Author: Site Editor Publish Time: 2026-05-26 Origin: Site
Use wider or variable fin spacing (10–16 mm for seafood/shrimp) to slow frost buildup, reduce defrost frequency.
Keep evaporator coils clean to maintain high heat transfer efficiency.
Use electric defrost or hot-gas defrost only when needed — avoid timed defrost; use demand-controlled (frost detection).
Optimize suction superheat to prevent compressor overload.
Install economizers / subcoolers to improve COP of the refrigeration system.
Use variable-speed drives (VFD) for compressors, fans, and pumps to match load.
Improve door seals, curtains, and air locks at infeed/outfeed.
Minimize open-door time; use automatic doors.
Add insulated tunnels or cold curtains to reduce warm air entry.
Maintain good insulation of the IQF cabinet and floor.
Use high-efficiency EC fans instead of AC fans.
Reduce fan speed during low load; avoid over-circulating air.
Balance airflow to prevent short-circuiting (air not passing through product bed).
Ensure uniform air distribution across the belt.
Pre-cool or pre-chill product before entering IQF (especially warm/cooked shrimp).
Maintain uniform product layer thickness on the belt to avoid over-freezing.
Operate at designed capacity — avoid underloading (wastes energy) or overloading (slows freezing).
Reduce product surface moisture where possible (mild draining before freezing).
Set optimal discharge air temperature (not colder than necessary).
For shrimp/seafood: typically -30°C to -35°C is sufficient; avoid going colder without reason.
Minimize temperature fluctuations.
Extend time between defrosts by controlling humidity and coil frosting.
Recover heat from compressor discharge to preheat water, dry product, or heat the processing area.
Integrate with a centralized refrigeration system instead of small independent units for better part-load efficiency.
Regularly check for refrigerant leaks — even small leaks drastically reduce efficiency.
Keep condensers clean and unobstructed.
Ensure proper expansion valve adjustment.
Train staff to avoid unnecessary door openings and over-cooling.
