Refrigeration Cycle Demonstration Equipment

Refrigeration Cycle Demonstration Equipment

Teaching Objectives of

• Observe the evaporation and condensation of the refrigerant.
• Represent and understand the refrigeration cycle in a diagram: log p,h.

Energy Balances

• Determination of the coefficient of performance
• Oil return in a submerged evaporator

Technical specifications

• An evaporator in which the coolant is vaporized and removes a certain quantity of heat from the water circulating in the copper tube coil.
• A hermetic compressor.
• A condenser.
• A pressure relief valve that allows the passage of coolant, liquid from the condenser, towards the evaporator by reducing pressure.
• A porthole window placed between the pressure relief valve and the evaporator allows observation of steam formation during the period of rest.

Instrumentation

• Two pressure gauges.
• Eight Pt100 sensors with a digital indicator
• Two flowmeters

Supplementary

• Option 1: Digital Wattmeter
• Option 2: Rotameter for the coolant flow rate
• Option 3: Acquisition module:
• Replacement of two gauges by piezometric sensors with analog output
• Interfaces 4-20 mA / RS485
• RS485 Converter - RS 432
• One OPC server
• Block diagram of the system developed in Labview

Essential requirements

• Electricity supply: 220/240 V single phase 50 Hz + Earth
• Water supply and drainage: 400 L/h, pressure 1 bar

Dimensions and weight

• 850 x 550 x 800mm – 50 kg