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Products | Thermodynamics, Heating and Sanitary Systems | Refrigeration and Air Conditioning | ET 915 | ET 915.02

ET 915.02

Double Chamber Refrigerator Module

Technical Description

The experimental set-up is clearly arranged on a metal board which is placed on the base unit ET 915. The pipe connection between the basic unit and the auxiliary module is made via self-locking Schrader valves. The individual components of the unit, in this case fans, heater, compressor and solenoid valves, are controlled by the software (included in the scope of supply of the base unit). ET 915.02 is a model of a refrigeration system. The refrigerating capacity is generated by two evaporators in enclosed chambers. Fans help to achieve an even distribution of temperatures in the chambers. A cooling load can be simulated in the chambers with two heaters. Solenoid valves allow various operating modes, e.g. the serial or parallel operation of the evaporators.

Learning Objectives / Experiments

· Familiarisation with a cooling system and its main
components
· Series and parallel operation of an evaporator
· Familiarisation with various expansion elements:
- Operation with a capillary tube
- Operation with an expansion valve
· Effects of a cooling load
· Cyclic process on the p-h state diagram
· Fault finding and simulation

Features

Instructional program for refrigeration engineering
Industrial cooling system
Serial and parallel operation of evaporators
Processing measured data in a PC
Control of components with software
Fault simulation via software

Specification

[1] Auxiliary module with a refrigerator model with 2 cooling chambers
[2] To be used with ET 915
[3] 2 closed chambers with transparent cover cooled by an evaporator
[4] 2 electrical heaters to generate a cooling load
[5] 3 expansion elements: 2 expansion valves and capillary tube
[6] Adjustable evaporation pressure controller
[7] Instrumentation: electronic sensors
[8] Operating modes of the unit can be configured via 5 solenoid valves
[9] Solenoid valves, equipment switches and fault simulation activated via software
[10] Linking of modules with Schrader valves

Technical Data

Electric heating element PTC to generate a cooling load: 210W
Lamellar evaporator with fan, axial fan: 18W, max. flow rate: 160m³/h
Capillary tube: length 2m
Measuring range of sensors:
- 6x temperature: -40...150°C
- 2x pressure: -1...9bar
Evaporation pressure controller: 0...5.5bar

Dimensions and Weight

l x w x h : 800 x 360 x 750 mm
Weight : approx. 45 kg

Scope of Delivery

1 auxiliary module, filled with refrigerant

Order Details

061.91502 ET 915.02 Double Chamber Refrigerator Module