CoolProp Wiki
A practical thermodynamics and refrigerants primer for HVAC and automotive use cases.
Short, practical notes to help you interpret results from FluidTool. These pages are educational and do not replace codes, standards, manufacturer guidance, or local regulations.
P-h Diagram
How to read a pressure-enthalpy chart: dome, quality, isolines, and cycle intuition.
Superheat & Subcooling
ΔTsh and ΔTsc definitions, how they relate to saturation, and measurement pitfalls.
Two-phase quality (Q)
How vapor quality works on the saturation line and why PT can be ambiguous there.
Saturation pressure vs temperature
Psat(T) and Tsat(P), superheat/subcooling intuition, and common pitfalls.
Psychrometric Chart
How to read a moist air chart: Tdb, W, RH, dew point, and HVAC processes.
Dew Point
What dew point means, why it predicts condensation, and how it differs from RH.
Wet-bulb temperature (Twb)
What Twb means, why it matters for evaporative cooling, and how it differs from dew point.
RH vs Humidity Ratio (W)
Why RH changes with temperature while W tracks absolute moisture content.
Mixing Outdoor Air & Return Air
How to compute mixed air properties by mixing W and h (not RH).