It is part of the HSI training system for refrigeration and air conditioning technology. In combination with the base unit the operational model of a domestic refrigerator is created. The model is plugged onto the base unit, secured using fasteners and connected with refrigerant hoses to become a complete refrigeration circuit. It consists of a refrigeration chamber with a heater as cooling load, evaporator, fan and various expansion elements. The fan supports the achievement of an even temperature distribution in the chamber. A cooling load can additionally be simulated with the heater. Solenoid valves enable the operation of the system with capillary tube or with expansion valve. All components are clearly arranged on a panel. The operation of individual system components, here the temperature control, fan, heater, compressor and solenoid valves, takes place via the software. The software offers the option to simulate faults.
Learning Objectives/Experiments
Design and operation of a simple refrigeration system
Different expansion elements
Operation with capillary tube
Operation with expansion valve
Operating behaviour under load
Refrigeration cycle in the log p-h diagram
Fault simulation
Features
Simple model of a domestic refrigerator for connection to the HSI Training System Refrigeration And Air Conditioning Unit
Component operation and fault simulation via the software
Specification
Model of a refrigerator to plug onto the base unit
Training system with HSI technology
Refrigeration chamber with evaporator, fan and cooling load
Chamber with transparent front
Electric heater to generate the cooling load
Expansion elements selectable via solenoid valves: expansion valve or capillary tube
Sensors to record temperature and pressure
Operation of solenoid valves, fan, heater and fault simulation via software
Software: educational software, data acquisition, system operation
Technical Data
Electric PTC heater as cooling load: 210W
Capillary tube: length 2m
Measuring ranges
temperature: 3x -50…50°C
pressure: -1…9bar
