The Recirculating Air Conditioning Unit incorporates wheels for its mobility. Recirculating Air Conditioning Unit mounted on an anodized aluminum structure and panels of painted steel.
Main metallic elements of stainless steel.
2 Electrical heating elements, computer controlled: one of 2000W (pre-heater) at the inlet of the evaporator and other of 1000W (re-heater) at the outlet of the evaporator.
Axial fan, with speed control from computer, 2500 r.p.m., maximum flow: 2160 m3/h.
Evaporator.
Diagram in the front panel with similar distribution to the elements in the real unit.
Tunnel made of stainless steel of 300 x 300 x 4000 mm., in which there has been installed 4 windows of 200 x 300 mm. to visualize the tunnel inside.
Condenser unit, composed by:
Air flow 900 m3/h.
High-pressure cut-out, regulated at 14 bar. It switch off the compressor when the pressure reach the fix pressure.
Condenser, 1591BTU's.
Compressor, computer controlled, 1/2 Cv, 4.48 A.
Bench-top unit.
Diagram in the front panel with similar distribution to the elements in the real unit.
Cooling compressor, computer controlled.
Anodized aluminium structure and panels in painted steel (epoxy paint). Main metallic elements in stainless steel.
Air evaporator, computer controlled. Water evaporator.
High pressure control.
Coolant accumulation tank. Cooling filter. Tank of division of the cooling liquid.
Expansion valve.
Water condenser.
2 Pressure sensors: Cooling pressure sensor (compressor outlet). Cooling pressure sensor (compressor inlet).
4 Manometers.
3 Flow sensors: Cooling flow sensor. Water flow sensor (water condenser). Water flow sensor (water evaporator).
Wattmeter.
Bench-top unit. Anodized aluminium structure and panels in painted steel (epoxy paint). Main metallic elements in stainless steel.
Air condenser, computer controlled.
High pressure control.
Coolant accumulation tank. Cooling filter. Tank of division of the cooling liquid.
Diagram in the front panel with similar distribution to the elements in the real unit.
Cooling compressor, computer controlled.
Expansion valve.
Air evaporator, computer controlled.
Water evaporator.
4 Manometers.
2 Flow sensors: Cooling flow sensor. Water flow sensor (water evaporator).
9 Temperature sensors (4 sensors measure the cooling temperature, 2 sensors measure the water temperature, 3 sensors measure the air temperature
2 Pressure sensors: Cooling pressure sensor (compressor outlet). Cooling pressure sensor (compressor inlet).
Enthalpy diagram of the refrigerant R134a.
Wattmeter.
Bench-top unit.
Anodized aluminium structure and panels in painted steel. Main metallic elements in stainless steel.
High pressure control.
Coolant accumulation tank. Cooling filter. Tank of division of the cooling liquid.
Expansion valve.
Cooling compressor, computer controlled.
Water condenser.
Water evaporator.
4 Manometers.
2 Pressure sensors: Cooling pressure sensor (compressor outlet). Cooling pressure sensor (compressor inlet).
7 Temperature sensors:
3 Flow sensors: Cooling flow sensor. Water flow sensor (water condenser). Water flow sensor (water evaporator).
Enthalpy diagram of the refrigerant R134a.
Wattmeter.
Bench-top unit.
Diagram in the front panel with similar distribution to the elements in the real unit.
Cooling compressor, computer controlled.
Anodized aluminium structure and panels in painted steel. Main metallic elements in stainless steel.
Coolant accumulation tank. Cooling filter.
Expansion valve.
Water evaporator.
Air condenser, computer controlled.
High pressure control.
Tank of division of the cooling liquid.
4 Manometers.
2 Flow sensors (cooling flow sensor and water flow sensor).
2 Pressure sensors: Cooling pressure sensor (compressor outlet). Cooling pressure sensor (compressor inlet).
8 Temperature sensors (4 sensors for the cooling temperature, 2 sensors for water temperature, 2 sensors for the air temperature)
Enthalpy diagram of the refrigerant R134a.
Wattmeter.
The air is next passed through a filter of the type used in commercial systems and then cooled by the evaporation of refrigerant in a built-in condensing refrigeration unit. A variable delivery fan supplies metered air to a pre-treatment plenum chamber where it can be heated and humidified to a variable and measured extent. Any moisture condensed from the air at this stage is collected in a measuring cylinder. The refrigerant compressor is a single cylinder unit driven by an AC motor. The air then passes through a reheating chamber with a measurable heat input facility before discharge to atmosphere. The design of the unit is such as to ensure that all readings provided by the instrument relate to a proper homogeneous air flow.
Special Features:
The refrigerator condenser is adequate for use under tropical conditions, i.e. with cooling water up to 32ºC (90ºF).
Temperature readings from a total of 16 remote reading thermocouple instruments are provided by the Cussons multi-point, multi-range, thermometer. Safety in use Interlocked controls make it impossible to generate steam from the humidifier or to run either the air flow preheater or the air reheater without first turning on the air flow blower. However, water in the steam generator can be heated to 90ºC before starting the blower, in order to save class time. The level of water in the steam generator is shown by a sight glass.
The temperature reading point operative at any one time is shown by an indicator light on the mimic diagram.
Inlet air is cooled and preheated by a heater and latent heat by a humidifier before entering the climatic chamber for demonstration of climate control. The air in the climatic chamber is further heated by a heater and a humidifier before leaving. Recirculation Air Conditioning Unit With Climatic Chamber is a recirculating air conditioning unit with transparent windows and a climatic chamber. A fan after the preheater circulates the air. Part of the air leaving the climatic chamber is vented and the remaining is recirculated with make up fresh air entering the inlet duct. Measuring instruments are provided for air flow rate, and temperature and humidity at various stages. Additional instruments are provided for measurement of refrigerant flow rate, temperature and pressure as well as power for the compressor and heat sources. The amount of air recirculation is controlled by ventilation flaps. Steam generator, compressor and condenser are underneath the duct.
Experiments:
Demonstration of preheating, cooling and dehumidification, humidification, reheating, and mixing processes on psychrometric chart.
Demonstration of refrigeration cycle on Pressure-Enthalpy diagram of the refrigerant.
Determination of recirculating and mixing process of moist air.
Familiarization with recirculating air conditioning system and components.
Effects of climatic chamber heat loads.
Determination of preheating, cooling and dehumidification, humidification, and reheating processes.
Energy balance in the preheater, evaporator, and reheater.
Operation and programming of a DDC for heating and air conditioning systems
Process schematic of the simulated heating system with 2 boilers, 2 heating lines and water heating
Experimental unit from the practical series for the training of mechatronics engineers for refrigeration
Process schematics with bargraph displays and lamps for operating states of the actuators
16 potentiometers in the process schematics to adjust simulated temperatures
Process schematic of the simulated air conditioning system with selectable outer air and recirculating operation
Programmable DDC with selection and display of the operating states and error simulation
Process schematics on the front panel.
Model of a simple air conditioning system to plug onto the base unit
Training system with HSI technology
Radial fan with throttle valve
Thermostatic expansion valve as expansion element
Air duct with transparent front
Evaporator as air cooler
Thermostatic expansion valve as expansion element
Sensors to record temperature and differential pressure for determining the volumetric air flow rate
Radial fan with throttle valve
Operation of individual components and of the system and fault simulation via software.
Electrical simulation of compressor and fan
Identification of 15 faults: multimeter measures voltages or resistances at the lab jacks
Temperature control with thermostat and compressor
Fan with 2 adjustable speeds
Operating states of the simulated components indicated via lamps in the circuit diagram
Experimental unit from the practical series for the training of mechatronics engineers for refrigeration
Simulation of the electrical circuit of a simple air conditioning system for cooling
Real control circuits with electrical components, simulated load circuits
Circuit diagram depicted on the front panel.
Electric motor with variable speed as compressor drive
Condenser with fan
Evaporator as air cooler with three-stage fan
Investigation of a typical vehicle air conditioning system for cooling the vehicle interior
Compressor drive via v-belt and magnetic coupling
Display of temperatures, pressures (refrigerant), flow rate (refrigerant), pick-up current, speed
Air conditioning system voltage supply: 12VDC
Simulation of 8 faults via buttons in the connectable box
System is switched on via ignition lock
Compression refrigeration system with compressor, condenser, filter/drier, expansion valve and evaporator
Electric motor with variable speed as compressor drive
Condenser with fan
Evaporator as air cooler with three-stage fan
Compression refrigeration system with compressor, condenser, filter/drier, expansion valve and evaporator
Compressor drive via v-belt and magnetic coupling
Simulation of 8 faults via buttons in the connectable box
Investigation of a typical vehicle air conditioning system for cooling the vehicle interior
System is switched on via ignition lock
Air conditioning system voltage supply: 12VDC
Display of temperatures, pressures (refrigerant), flow rate (refrigerant), pick-up current, speed.
training of mechatronics engineers for refrigeration
Electrical simulation of compressor and fan
Temperature control with thermostat and compressor
Simulation of the electrical circuit of a simple air conditioning system for cooling
Identification of 15 faults: multimeter measures voltages or resistances at the lab jacks
Real control circuits with electrical components, simulated load circuits
Operating states of the simulated components indicated via lamps in the circuit diagram
Fan with 2 adjustable speeds
Circuit diagram depicted on the front panel.
