TCRC. Computer Controlled Refrigeration Cycle Demonstration Unit
Unit: TCRC. Refrigeration Cycle Demonstration Unit Control1.- Demonstration of the vapour compression refrigeration and heat pump cycle.
2.- Relation between pressure and temperature.
3.- Demonstration of the refrigerant transfer from the evaporator to the condenser.
4.- Charging demonstration.
5.- Demonstration of the air effect in a refrigeration (cooling) system.
6.- Evaporation and condensation temperatures effect in the refrigeration (cooling) rate and in the heat transfer at the condenser.
7.- Analysis of the pressures relation effect in the system behaviour.
8.- Determination of the system operation coefficients.
9.- Measurement of the electrical power.
10.-Estimation of the heat transmission global coefficient between the SES36 refrigerant and the water. Other possible practices:
11.-Sensors calibration.
12-30.- Practices with PLC.
1. TCRC. Unit:
The TCRC unit allows the demonstration of vapour compression refrigeration and heat pump cycle with visual observation of all important processes. It is bench-top unit that is assembled in anodized aluminium structure and panels in painted steel.
Compressor: hermetic compressor of 1/2CV, computer controlled (PC).
Condenser: vertical be seen where in its inside cooling water circulates.
The heat transmission surface is formed by 9 nickel-plated copper spires of 1/4” diameter through which the water flows.
Evaporator: of similar structure to that of the condenser, and with a specially treated copper coil to promote the ebullition.
Expansion valve. Sight glass. 11 Temperature sensors that indicate the water output and input temperatures, both in the condenser and in the evaporator, and the evaporation, condensation, expansion and enviromental temperatures. Maximum working temperature: 100ºC. 2 Flow sensors to measure the water flow (condenser and evaporator). 2 Pressure sensors indicate the refrigerant fluid pressure in the condenser and in the evaporator. Power measurement from computer (PC).
Safety devices: relief valve and high pressure cut-out.
This unit has been designed for the use with the SES36 refrigerant gas, environmental friendly.
2. TCRC/CIB. Control Interface Box:
With process diagram in the front panel. The unit control elements are permanently computer controlled. Simultaneous visualization in the computer of all parameters involved in the process. Calibration of all sensors involved in the process. Real time curves representation. All the actuators’ values can be changed at any time from the keyboard. Shield and filtered signals to avoid external interferences. Real time control with flexibility of modifications from the computer keyboard of the parameters, at any moment during the process. Open control allowing modifications, at any moment and in real time, of parameters involved in the process. 3 safety levels: mechanical in the unit, electronic in the control interface, and the third one in the control software.
3. DAB. Data Acquisition Board:
PCI Data acquisition National Instruments board to be placed in a computer slot. 16 Analog inputs. Sampling rate up to: 250 KS/s . 2 Analog outputs. 24 Digital Inputs/Outputs.
4. TCRC /CCSOF. Computer Control+Data Acquisition+Data Management Software:
Flexible, open and multicontrol software. Management, processing, comparison and storage of data. Sampling velocity up to 250,000 data per second . It allows the registration of the alarms state and the graphic representation in real time.
5. Cables and Accessories, for normal operation.
6. Manuals: This unit is supplied with 8 manuals.
Dimensions (approx.) =Unit: 700 x 700 x 720 mm. Weight: 70 Kg. Control Interface: 490 x 330 x 310 mm. Weight: 10 Kg.
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