G.U.N.T. - Equipment for engineering education

Products | Thermodynamics, Heating and Sanitary Systems | Refrigeration and Air Conditioning | ET 413C

ET 413C

Domestic Refrigeration Trainer / PC

Technical Description

The ET 413C system demonstrates the operation of a compression refrigeration unit. A closed, insulated chamber is cooled using a refrigeration circuit comprising a compressor, condenser, evaporator and capillary tube. A special feature is the ability to enlarge the heat exchange area of the condenser by switching in a 2^nd stage. It is possible to use the unit to simulate faults.
The intake and delivery pressure of the compressor are indicated on pressure gauges with an additional temperature scale for the refrigerant and recorded using pressure transducers. Temperature sensors measure the relevant temperatures. Their values are indicated on a digital display with selector switch. A further switchable display indicates the voltage, current and power consumption of the compressor. At the same time, the measured data can be displayed and processed on a PC. A data acquisition card with appropriate software is included.

Learning Objectives / Experiments

- Getting to know the components of a typical
refrigeration unit for household use and their
functions
- Measuring relevant temperatures and pressures
- Presentation of the thermodynamic cyclic process
in a p,h state diagram
- Effects of changes in the removal of heat via the
surface of the condenser
- Fault finding (blocked filter, blocked evaporator)
- Determination of the coefficient of performance of
the system
- Energy balances

Features

* Simply structured mobile compression refrigeration
unit
* Influence of condenser surface
* Fault finding
* CFC-free refrigerant R134a
* PC data acquisition

Specification

[1] Refrigerating unit with 2-stage switchable condenser and PC data acquisition
[2] Refrigeration circuit with compressor, condenser, evaporator and capillary tube
[3] Refrigeration of a closed, insulated chamber with room temperature display and adjustable thermostat, switching range -25...2°C
[4] Condenser surface can be doubled using manual valves
[5] Hermetic reciprocating compressor
[6] Box evaporator with capillary tube
[7] Environmentally friendly refrigerant R134a
[8] Processing of measured data on a PC
[9] 230V, 50Hz, 1 phase or 120V, 60Hz, 1 phase

Technical Data

Compressor: refrigerating capacity: 322W at 0/35°C, Power consumption: 125W
Wire tube condenser, 2-stage, switchable
Box evaporator with capillary tube
Measuring ranges of sensors and instruments:
- refrigerant flow rate 1.5..23.5ltr/h
- pressure: -1...9bar / -1...24bar
- 7 temperature sensors: -30...100°C
Switchable compressor power meter: Display of U, I, P
System requirements for LabView software: Runs under Windows NT/2000/XP

Dimensions and Weight

l x w x h: 2000 x 750 x 1900 mm
Weight : approx. 150 kg

Connections

230V, 50Hz, 1 phase or 120V, 60Hz, 1 phase

Scope of Delivery

1 system, fully assembled, 1 data acquisition card with software, 1 instruction manual

Order Details

061.413C0 ET 413C Domestic Refrigeration
Trainer / PC