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Products  |  Thermodynamics, Heating and Sanitary Systems  |  Refrigeration and Air Conditioning  |  ET 411C
ET 411C Basic Cycle Refrigeration Trainer / PC Show data sheet (pdf file) Print page
Technical Description
The system contains a simple refrigerant circuit with compressor, condenser, evaporator and metering devices. The refrigerant passes through glass tubing incorporated into the heat exchangers so that the evaporation and condensation processes can be directly observed. The system is equipped with a thermostatic expansion valve and capillary tubes of various lengths so that the different metering devices can be studied. Measured data is acquired using modern electronic sensors. The measured values are indicated on digital displays and can be transmitted at the same time to a PC. A data acquisition card and software are included.  
Learning Objectives / Experiments
- Familiarisation with a refrigeration circuit
- Function and operating behaviour of individual
  components
- Comparison of operation with fixed and adjustable
  expansion valve elements (expansion valve,
  capillary tubes with different lengths)
- Measuring relevant temperatures and pressures
- Thermodynamic cyclic process on a p-h diagram
- Theoretically possible using the p-h state diagram:
  + determination of the refrigerating capacity of the
      system
  + determination of the coefficient of performance
  + determination of efficiency
Features
* Refrigeration system with PC data acquisition1
* Heat exchanger with transparent refrigerant pipes1
* Direct observation of the phase transition possible1
* Comparison of different expansion elements
Alternative products
ET 350 -- Vapour Compression Refrigeration Cycle
ET 352 -- Steam Jet Refrigeration System
ET 400 -- Refrigeration Training System
Specification

[1] Refrigeration system with different expansion elements
[2] Comparison of expansion valve and capillary tubes of varying length
[3] Refrigerant circuit consisting of hermetic compressor, condenser, evaporator and expansion element
[4] Evaporator and condenser with transparent pipes, fan and collector
[5] System diagram with signal lamps
[6] PC data acquisition with LabView software under Windows XP
[7] l x w x h: 1520x750x1865mm, 150kg
[8] 230V, 50Hz, 1 ph. or 120V, 60Hz, 1 ph.

 
Technical Data

Compressor

- power consumption: 167W at -5/32°C

- refrigerating capacity: 224W at -5/32°C
- operating pressure: 8...12bar
Finned tube evaporator and condenser with fan

- max. airflow rate: 300m³/h each
Capillary tubes: 0.5m, 1m, 2m
2 refrigerant collectors: 1.3L each
 

Measuring ranges
- pressure: -1...9bar / -1...24bar
- temperature: 4x -40...150°C
- flow rate: 1.5...23.5L/h
- power: 0...1000W

 
Dimensions and Weight
l x w x h : 1520 x 750 x 1865 mm
Weight : approx. 150 kg
Connections
230V, 50Hz, 1 ph. or 120V, 60Hz, 1 ph.
Scope of Delivery

1 refrigeration system, completely assembled and

   filled

1 data acquisition card with software

1 instruction manual
Order Details
061.411C0 ET 411C Basic Cycle Refrigeration 
                   Trainer / PC
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© 2005 G.U.N.T. Gerätebau GmbH