To identifying faults in refrigeration systems requires comprehensive knowledge This knowledge also includes the design and purpose of the individual components. Refrigeration system trainer helps to acquire this knowledge. The components of a refrigeration circuit with refrigeration and freezing chambers are arranged clearly in the trainer. Valves enable the individual or parallel operation of the evaporators in the two chambers. The circuit is equipped with a pressure switch for the delivery and intake side of the compressor. The refrigeration chamber features an evaporation pressure controller. The effect of the evaporation pressure controller on the overall process is being examined. An inner heat exchanger in the inlet of the two evaporators is used for super cooling the refrigerant to increase the efficiency of the process. At the same time the intake gas is super heated. An electric defrost heater is available to defrost the freezing chamber. The process schematic at the trainer offers a quick overview. Signal lamps in the process schematic indicate the operating state of selected components. Relevant measured values are measured by sensors. The measured values can be read on digital displays. Optionally At the same time, the measured values can also be transmitted directly to a PC via DAQ. The data acquisition software is optional. The most important pressures are additionally indicated with manometers directly at the trainer. The software enables the representation of the cyclic process in the log p-h diagram.
Experiments
- Design and components of a refrigeration system with 2 evaporators.
- Components and their functions.
* compressor, condenser, evaporator.
* thermostatic expansion valve.
* evaporation pressure controller.
* pressure switch.
* electric defrost heater. - Thermodynamics of the refrigeration cycle.
* effect of refrigerant super cooling.
* representation of the thermodynamic cycle in the log p-h diagram.
* determination of important characteristic variables.
* coefficient of performance.
* refrigeration capacity.
* compressor work. - Fault finding in refrigeration system components.
Specification
- Investigation of a refrigeration system with refrigeration and freezing chambers
- Refrigeration circuit with compressor, condenser and 2 evaporators with thermostatic expansion valve and evaporation pressure controller
- Insulated freezing chamber with fan and electric defrost heater.
- Insulated refrigeration chamber with evaporation pressure controller.
- Heat Exchanger for refrigerant super cooling
- Individual or parallel operation of the chambers via valves.
- Refrigerant R 134 a, CFC-free.
