Standard Rating Cycle:
The standard rating cycle correspond to the ideal refrigeration cycle illustrated in fig (3). Though, different operating conditions contain different effects on the vapor compression cycle. We learn these effects in detail below.
Effect of Evaporator Pressure
Effect of Evaporator & Condenser Pressure Drops
As illustrated in Fig 6, a reduction in evaporator pressure p1 causes the state 5 & 1 to move to states 5? & 1? respectively. As a consequence, the work input to the compressor enhanced by areas 0?-1?-1-0 & 1-1?-2?-2. The COP & capacity of the refrigeration system therefore decreases.