Printable log(p)-h Diagrams for Refrigerants

Log(p)-h diagram for refrigerant R134a generated using CoolPack
Log(p)-h diagram for refrigerant R134a generated using CoolPack.

This page provides printable PDF versions of pressure-enthalpy diagrams, also known as log(p)-h diagrams or p-h charts, for water, ammonia, CO₂, hydrocarbons and many common refrigerants. These diagrams are useful for refrigeration, heat pump and thermodynamic cycle calculations.

Available diagrams include natural refrigerants such as ammonia (R717), carbon dioxide (R744), propane (R290), water (R718), air (R729) and nitrogen (R728), as well as many HFC and HCFC refrigerants including R134a, R404A, R407C and R410A.

Use these printable log(p)-h diagrams together with Calcumber's interactive calculation tools:

Refrigeration Cycle Calculator Thermodynamic Properties Calculator