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DESCRIPTION

The RA1-MKII is a self contained computer controlled vapour-compression refrigeration system with automatic recording of all important process variables using an integral USB interface device.

Compressor speed and power supplied are displayed on the PC. The hermetically sealed refrigerant exiting the compressor passes through a condenser, receiver, filter, variable area flowmeter, expansion valve and evaporator before returning to the inlet side of the compressor.

• Gain an in-depth understanding of the vapour-compression process by changing the operation of different parts of the process and recording the response of the complete system
• To operate vapour-compression refrigeration system and understand the relation between the hardware components and the refrigeration cycle
• First Law of Thermodynamics – The law of conservation of energy
• To investigate the effect on the refrigeration system of the flow of water through the condenser and to determine the optimum flow rate for a given load
• To investigate the effect on the refrigeration system of the flow of water through the evaporator and to determine the optimum flow rate for a given system load
• To investigate the effect of the flow of refrigerant through the refrigeration system, and whether there is an optimum flow rate
• To investigate the effect of closing/opening the expansion valve on a refrigeration system, and to determine the optimum setting for a particular application
• Coefficient of Performance (COP)
• Thermodynamic system modelling
• To perform appropriate energy balances and a detailed analysis of the performance of the refrigeration system