MECHANICAL REFRIGERATION

 Refrigeration Cycle:     The refrigeration effect can be achieved by using one of these
 cycles:
                                     · Vapor compression-expansion
                                     · Absorption
                                     · Steam jet (water-vapor compression)
 By utilizing the Pressure-Enthalpy (P-H) diagram, the refrigeration cycle can be broken down into four distinct steps:
                                     · Expansion
                                     · Evaporation
                                     · Compression
                                     · Condensation
 The vapor-compression refrigeration cycle can be represented by the process flow diagram.