Vapor Compression • P-h Diagram • COP • 4 Refrigerants — Simulate • Explore • Practice • Quiz
| # | Question | Result |
|---|
The vapor compression refrigeration cycle is the most widely used cooling technology in the world, found in household refrigerators, air conditioners, heat pumps, and industrial chillers. It works by exploiting the thermodynamic properties of refrigerants — substances that absorb heat when they evaporate at low pressure and release heat when they condense at high pressure. This virtual lab lets you experiment with 4 different refrigerants and adjust operating conditions to understand how the cycle performs.
The simulator calculates real-time thermodynamic properties at all 4 state points, including temperatures, pressures, and specific enthalpies. The animated P-h (pressure-enthalpy) diagram shows the complete cycle with the saturation dome, and the system schematic visualizes refrigerant flow through the compressor, condenser, expansion valve, and evaporator.
The compressor raises the pressure and temperature of the refrigerant vapor. The condenser rejects heat to the surroundings as the refrigerant condenses from vapor to liquid. The expansion valve (throttling device) reduces pressure in an isenthalpic process, producing a cold two-phase mixture. The evaporator absorbs heat from the cooled space as the refrigerant boils. The Coefficient of Performance (COP = Qevap/Wcomp) measures the cycle's efficiency.
Choosing the right refrigerant involves balancing thermodynamic performance, safety, and environmental impact. R-22 (HCFC) is being phased out due to ozone depletion. R-134a (HFC) has zero ODP but high GWP. R-410A offers higher capacity but higher pressures. R-290 (propane) is a natural refrigerant with excellent thermodynamic properties but is flammable. This simulator helps compare all four refrigerants under identical operating conditions.