Deep-Freezing Trainer Refrigeration Training Equipment Didactic Education Equipment

SUR Deep-Freezing Trainer Refrigeration Training Equipment Didactic Education Equipment

This trainer, specifically 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 (platetype heat exchanger) and forced convection (finned 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 flow
• Plotting the cycle in the refrigerant pressure-enthalpy diagram
• Data acquisition and calculation of:
- heat balances corresponding to evaporator, condenser, compressor
- refrigerant mass flow
- ideal and actual EER
- volumetric compression efficiency
• 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

TECHNICAL SPECIFICATIONS
• Steel structure mounted on wheels, painted and treated in the oven
• Colour silk-screen-printed schematic diagram of the hydraulic circuit with warning LEDs
• Hermetic compressor
• Forced-air condenser with variable flow settable by potentiometer
• 2 cold rooms with separate evaporators: plate evaporator and ventilation evaporator
• Thermostatic expansion valves
• Freezing room thermostats
• Liquid receiver
• Hot gas defrosting system
• Solenoid valves, on-off valves, sight glass, dehydrator filter
• Valve for plant vacuum, refrigerant charging and recovering
• Pipes connecting the various components painted with different colours
• Full set of instruments for data acquisition, including:
- flowmeter
- high and low pressure gauges
- 2 electronic thermometers with Pt100 probes to be inserted into several test points along the hydraulic circuit
- instrument for recording the temperature inside the product core
- digital multimeter
• Double pressure switch
• Thermomagnetic - earth leakage control button
• Emergency button
Power supply: 230 Vac 50 Hz single-phase - 850 VA (Other voltage and frequency on request)
Dimensions: 180 x 80 x 180 cm
Net weight: 260 kg
Supply with 
THEORETICAL – EXPERIMENTAL HANDBOOK