• Description

This trainer, specifi cally conceived for educational aims, allows to study deep freezing that is a technological improvement of freezing.
This trainer permits to determine the actual rate of cold penetration inside the products under examination via two different systems of heat exchange: natural convection (plate-type heat exchanger) and forced convection (fi nned battery).

TRAINING PROGRAM:
• Plant starting and safety devices intervention checking
• Studying the operation of a thermostatic expansion valve and its calibration
• ON/OFF control: freezing room thermostat
• Analyzing the system behaviour versus the variation of:
- Thermostatic valves superheat
- condenser air fl ow
• Plotting the cycle in the refrigerant pressure-enthalpy
diagram
• Data acquisition and calculation of:
- heat balances corresponding to evaporator, condenser,
compressor
- refrigerant mass fl ow
- ideal and actual EER
- volumetric compression effi ciency
• Determination of cold penetration rate in the meat, in seafood, in vegetables, etc…
• Identifying the most suitable substances to be deep-frozen
• Duration of deep-frozen products
• Hot gas defrost