The log p-h diagram simplifies the complex thermodynamic processes in the refrigeration cycle by providing a visual representation of the refrigerant’s state changes. It eliminates the need for tedious calculations using formulae and tables, allowing for faster and more accurate analysis of the refrigeration cycle. Additionally, the log p-h diagram enables engineers to quickly identify the different regions of the refrigerant’s state, including liquid, boiling, and gaseous, as well as their mixed forms.