Yes, a pressure-enthalpy diagram can be used to compare the performance of different refrigerants. By overlaying the diagrams for different refrigerants, technicians and engineers can compare their thermodynamic properties, such as enthalpy, entropy, and specific volume. This allows for a direct comparison of the refrigerants’ performance characteristics, such as their cooling capacity, efficiency, and operating pressures. This information can be used to select the most suitable refrigerant for a specific application or to evaluate the potential benefits of transitioning to a new refrigerant.