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Simple Compression Refrigeration Circuit

Simple Compression Refrigeration Circuit

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Product Description

SIMPLE COMPRESSION REFRIGERATION CIRCUIT

The set-up of represents a typical refrigeration circuit consisting of a hermetic compressor, condenser, evaporator and expansion element. Evaporator and condenser are designed as finned tube heat exchangers. The pipes of both heat exchangers are partially transparent to visualise the process of the phase transition during evaporation and condensing. Three capillary tubes of different lengths and a thermostatic expansion valve can be compared as expansion elements.                                  

The trainer is equipped with a receiver for refrigerant. Using the receiver, refrigerant can be added to or removed from the refrigeration circuit. This allows for the effects of overfilling or underfilling of the system to be examined.                          

The flow rate of the refrigerant is read from a flow meter. Temperature and pressure in the refrigeration circuit and the electrical power consumption of the compressor are recorded by sensors. The measured values can be read on digital displays. At the same time, the measured values can also be transmitted directly to a PC via USB. The data acquisition software is included. Parameter changes in the refrigeration circuit can be viewed dynamically in the software's log p-h diagram.        

The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments. The unit perform the following experiments and investigations:

Learning Objectives / Experiments

  • Fundamentals of a compression refrigeration circuit
  • Key components of a refrigeration system
  • Compressor, evaporator, condenser, expansion element
  • Relationship between the pressure and boiling point of a liquid
  • Operation of a refrigeration system / heat pump
  • Developing a basic understanding of the thermodynamic cycle
  • Simple energy balance

Specification

  • Fundamentals of refrigeration in a simplified model
  • Typical compression refrigeration system with piston compressor, thermostatic expansion valve, evaporator and condenser (each in the shape of a pipe coil)
  • 2 Manometers with temperature scale for the refrigerant show the values of the refrigerant on the high and low pressure sides
  • 2 Water-filled tanks with thermometer to demonstrate the cooling and heating effect
  • Pressure switch to protect the compressor
  • Sight glass to monitor the aggregate state of the refrigerant
  • Refrigerant R134a, CFC-free

Technical Data

  • Compressor
  • Power consumption: 104W at 5/40°C
  • Refrigeration capacity: 278W at 5/40°C
  • Displaced volume: 2,72cm³
  • Manometer with temperature scale for R134a
  • Intake side (low pressure)
  • Pressure: -1...12,5bar
  • Temperature: -50...40°C
  • Delivery side (high pressure)
  • Pressure: -1...25bar
  • Temperature: -40...80°C
  • Thermometer: 2x -10...50°C
  • Tank: 4x 1700mL

Dimensions and Weight

  • LxWxH: 750x360x690mm
  • Weight: approx. 30kg 

 

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