Real Fluid Calculator

Calculate real fluid properties for more than 100 fluids using state-of-the-art Helmholtz equations of state and thermophysical data from the CoolProp library. Real fluids depart from ideal gas behavior as they are compressed. The gold standard in real fluid models is the Helmholtz energy equation of state advanced by NIST and others through publications and the NIST RefProp software. This model uses the CoolProp libary’s implementation.

Press to see the model. Try your own inputs or the examples below. Refresh your browser to clear results.

Helium pressurant tank

  1. A satellite uses a high-pressure helium pressurant tank Fluid = helium  to maintain pressure in its fuel tank.
  2. If the maximum expected operating pressure of the tank is 6000 psi P.psi = 6000 at room temperature T.c = 20 , then what is the helium density? The model infers a density ρ «ctrl+g» of 57 kg/m³ (among many other properties).