Industrial Refrigeration Trainer Refrigeration Trainer Vocational Didactic Equipment

TRI Industrial Refrigeration Trainer Refrigeration Trainer Vocational Didactic Equipment

This trainer is designed for the study of industrial refrigeration whose main aim consists in controlling the temperature and relative humidity of one or more cold rooms. In this case a unique compressor and a unique condenser are used for two different cold rooms: one for frozen products and the other for fresh products. This trainer is also conceived to identify and analyze the behaviour of all the critical components of the cycle. Users’ attention is focused onto important issues concerning the balancing of valves and the keeping of constant operating pressures versus the external and internal load conditions.
TRAINING PROGRAM
• Plant starting and safety devices intervention checking
• Studying the operation of a thermostatic expansion valve and its calibration
• Studying the operation of an evaporating pressure controller and its calibration
• ON-OFF control: Refrigerated room thermostat
• Correlation between evaporation temperature, room temperature and relative humidity in positive-temperature
rooms
• Analyzing the system behaviour versus the variation of:
- thermostatic valve superheats

- condenser air flow
- evaporating pressure controller working point
• Using the refrigerant pressure-enthalpy diagram as work and diagnosis tool: plotting the refrigeration cycle
• Data acquisition and calculation of:
- heat balances corresponding to evaporator, condenser, compressor
- refrigerant mass flow
- ideal and actual EER
- volumetric compression efficiency and its trend versus compression ratio
- condenser exchange surface
- heat transfer coefficient between air and refrigerant in the condenser
- heat losses through the room walls
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
• Thermostatic expansion valves
• Evaporating pressure controller
• Refrigerated room thermostats
• Liquid receiver, liquid separator
• Solenoid valves, check valve, 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 for detecting pressures on several points along the hydraulic circuit
- electronic thermometers with Pt100 probes to be inserted into several test points along the hydraulic circuit
- digital multimeter
• Double pressure switch
• Thermomagnetic - earth leakage control button
• Emergency button
Power supply: 230 Vac 50 Hz single-phase - 560 VA (Other voltage and frequency on request)
Dimensions: 180 x 80 x 180 cm
Net weight: 180 kg
Supply with 
THEORETICAL – EXPERIMENTAL HANDBOOK