Abstract
The fundamental principles and applications of thermodynamics and single-component phase equilibrium are used to explain and quantitatively analyze the operation and performance of the vapor-compression refrigerator (VCR). Carbon dioxide is used as the refrigerant. The four processes (or steps) that comprise the VCR refrigeration cycle are explained. The thermophysical properties of CO2 are used to calculate the heat, work, and changes in internal energy, enthalpy, and entropy for each step. Plots of pressure versus molar volume (Vm), temperature versus Vm, and temperature versus molar entropy are presented. The coefficient of performance, an index of refrigerator efficiency, is calculated.
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