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Simple Vapour Compression Refrigeration Systems topics include: Simple VCR system mechanism, theoretical VCR with dry saturated vapour and superheated vapour after compression, actual VCR cycle, VCR system various parameters effect and pressure – enthalpy chart.
A vapor compression refrigeration system (VCRS) is a closed system that uses mechanical energy to cool the surrounding air. VCRS systems are made up of four main components: Compressor: A mechanical device that increases the pressure of gaseous refrigerants by decreasing their volume Condenser: Changes the phase of the refrigerant in the vapor phase to a high-pressure liquid Expansion valve or throttle valve Evaporator: A series of coils that create surface area for the refrigerant to react with
The VCRS cycle's goal is to raise the pressure of the refrigerant as it flows from the evaporator. The high-pressure refrigerant then flows through a condenser/heat exchanger. VCRs can cover a range of heating and cooling temperatures by varying pressure. As the refrigerant changes state, heat is absorbed and expelled by the system, lowering the temperature of the conditioned space. VCRs can consume a lot of electricity to produce a unit refrigeration effect. However, ejector expansion refrigeration units can outperform standard VCR units in terms of thermodynamic performance.
Related Test: Refrigeration and Air Conditioning Practice Test: Vapour Refrigeration Systems
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