How is the compression ratio calculated in refrigerant systems?

The compression ratio in refrigerant systems is calculated by taking the absolute discharge pressure and dividing it by the absolute suction pressure. This method is crucial because it provides a clear understanding of how much the refrigerant is being compressed from the evaporator (suction side) to the condenser (discharge side).

Using absolute pressures is important in this calculation for a couple of reasons. First, it ensures that measurements are consistent and accurate; absolute pressure accounts for atmospheric pressure, eliminating any variations caused by changes in atmospheric conditions. This allows for a more precise understanding of the system's performance.

Calculating the compression ratio using absolute values also helps technicians and engineers assess the efficiency of the refrigeration cycle. A higher compression ratio might indicate higher efficiencies in certain conditions, whereas a lower ratio could suggest issues such as refrigerant leaking or system inefficiencies.

In summary, option B correctly identifies the method to accurately determine the compression ratio, providing insights into the performance and workings of the refrigerant systems.