Fundamentals of refrigeration
Refrigeration engineering describes the removal of heat from an enclosed space which is to be cooled. In a compression refrigeration system, refrigerant flows through the four main components compressor, condenser, expansion valve and evaporator, thereby undergoing various state changes.
![Changes of state in the refrigeration circuit Changes of state in the refrigeration circuit](http://etmodo.com/wp-content/uploads/2021/08/ET-350-Changes-of-state-in-the-refrigeration-circuit-gunt-198-foto_totale.jpg)
ET 350
Changes of state in the refrigeration circuit
Energetic analyses of the refrigeration cycle; transparent components offer insights into the changes of state.
![Refrigeration circuit with variable load Refrigeration circuit with variable load](http://etmodo.com/wp-content/uploads/2021/08/ET-400-Refrigeration-circuit-with-variable-load-gunt-202-foto_totale.jpg)
ET 400
Refrigeration circuit with variable load
Compression refrigeration system with water-cooled evaporator.
![Compression refrigeration system Compression refrigeration system](http://etmodo.com/wp-content/uploads/2017/04/ET-411C-Compression-Refrigeration-System-gunt-206-foto_totale.jpg)
ET 411C
Compression refrigeration system
Comparison of different expansion elements; effect of under/overfilling of the system with refrigerant.
![HSI training system refrigeration and air conditioning technology, base unit HSI training system refrigeration and air conditioning technology, base unit](http://etmodo.com/wp-content/uploads/2017/04/ET-915-HSI-training-system-refrigeration-and-air-conditioning-technology-base-unit-gunt-302-foto_totale.jpg)
ET 915
HSI training system refrigeration and air conditioning technology, base unit
Modern learning environment through hardware/software integration (HSI).
![Refrigerator model Refrigerator model](http://etmodo.com/wp-content/uploads/2017/04/ET-915.01-Refrigerator-Model-gunt-303-foto_totale.jpg)
ET 915.01
Refrigerator model
Simple model of a domestic refrigerator for connection to ET 915.
![Model of a refrigeration system with refrigeration and freezing stage Model of a refrigeration system with refrigeration and freezing stage](http://etmodo.com/wp-content/uploads/2021/08/ET-915.02-Model-of-a-refrigeration-system-with-refrigeration-and-freezing-stage-gunt-304-foto_totale.jpg)
ET 915.02
Model of a refrigeration system with refrigeration and freezing stage
Series and parallel connection of evaporators; connection to ET 915.
VIETNAM | Ho Chi Minh City |Solution Center
VIETNAM | Hanoi| Solution Center