ZM6155 Introduction to Refrigeration Refrigeration Trainer
Vocational Training Equipment
1. Overview
* Training system with interchangeable modules1
* Components mounted on plates1
* Rapid connection via hoses
2. Technical Description
With simple and clear experiments this equipment is intended mainly
as
a basic introduction to refrigeration.
It enables familiarisation with the operation and handling of a
refrigeration system. The experimental unit includes all the
necessary components for a fully operational refrigeration circuit,
such as compressor, condenser, evaporator and a capillary tube as
expansion element.
Other components complement the scope of the equipment:
display and control panel, pressure switches and pressure display
to protect the compressor against excessive pressure and a flow
meter and sight glass with filter/drier. Condenser and evaporator
are each present twice: as air/refrigerant heat exchanger and as
water/refrigerant heat exchanger. This allows for different
component combinations.
The components are mounted on plates and form installation-ready
modules. 6 of the 8 modules are positioned in the frame at any one
time and connected via hoses and supply cables. This allows for the
construction of different simple compression refrigeration systems.
For filling the system the refrigerant filling and evacuation
equipment is recommended.
In experiments the processes in the equipment and the changes in
the refrigerant state are initially demonstrated. Continued
experiments allow the use of the equipment as a refrigeration
system and as a heat pump.
Pressures, flow rates power consumption of the compressor are
displayed as important characteristic variables of refrigeration
circuits.
The temperature is measured by interlaboratory thermometers.
The well-structured instructional material sets out the
fundamentals and provides a step-by-step guide through the
experiments.
3. Learning Objectives / Experiments
Fundamentals of a simple refrigeration circuit
- detection and understanding of the cyclic process
- changes of state of the refrigerant
- representation the refrigeration circuit in the process schematic
- representation of the cyclic process in the log p-h diagram
- estimating key figures, refrigeration capacity and heat fluxes
Different operating modes
- air cooling
- generating cold water
- heat pump (generate hot water)
Practical exercises
- draining and filling the refrigeration system (with)
- fault finding
4. Specification
[1] setup of simple refrigeration circuits with different
components
[2] 8 self-contained operational modules mounted on a plate each
[3] light-weight aluminium frame to arrange 6 modules
[4] evaporator and condenser each available as air/refrigerant heat
exchanger (finned tube heat exchanger) and as water/refrigerant
heat exchanger (with pipe coil)
[5] modules fitted with manual valves
[6] components connected via hoses
[7] CFC-free refrigerant R134a
5. Technical Data
Hermetic refrigerant compressor
- power consumption: 67W at -10/32°C
- refrigeration capacity: 151W at 5/32°C
Tank content
- water tank, evaporator: 2L
- water tank, condenser: 3L
Pressure switch activation pressure
- LP: 1bar
- HP: 14bar
Manometer
- inlet side (low pressure): 1...10bar
- outlet side (high pressure): 1...30bar
Rotameter: 0...7,4L/h
Dimensions and Weight
LxWxH: 1300x700x900mm
LxW: 370x340mm (component plates)
Weight: approx. 30kg
Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase
Scope of Delivery
1 frame
8 components on plates
1 set of hoses
1 set of cables
1 set of instructional material
