IAPWS95_TSAT

This function computes saturation temperature for water from saturation pressure using the IAPWS-95 inverse saturation fit.

The inverse relation is:

T_{sat} = f^{-1}(P_{sat})

where P_{sat} is saturation pressure and T_{sat} is saturation temperature.

Excel Usage

=IAPWS95_TSAT(Psat)

• Psat (float, required): Water saturation pressure (Pa).

Returns (float): Saturation temperature of water at the specified saturation pressure (K).

Example 1: Saturation temperature at low pressure

Inputs:

Psat
50000

Excel formula:

=IAPWS95_TSAT(50000)

Expected output:

354.467

Example 2: Saturation temperature near one atmosphere

Inputs:

Psat
101325

Excel formula:

=IAPWS95_TSAT(101325)

Expected output:

373.124

Example 3: Saturation temperature at elevated pressure

Inputs:

Psat
1000000

Excel formula:

=IAPWS95_TSAT(1000000)

Expected output:

453.028

Example 4: Saturation temperature near critical pressure

Inputs:

Psat
20000000

Excel formula:

=IAPWS95_TSAT(20000000)

Expected output:

638.899

Python Code

Show Code

from chemicals.iapws import iapws95_Tsat as chemicals_iapws95_tsat

def iapws95_tsat(Psat):
    """
    Compute saturation temperature from pressure using IAPWS-95.

    See: https://chemicals.readthedocs.io/chemicals.iapws.html#chemicals.iapws.iapws95_Tsat

    This example function is provided as-is without any representation of accuracy.

    Args:
        Psat (float): Water saturation pressure (Pa).

    Returns:
        float: Saturation temperature of water at the specified saturation pressure (K).
    """
    try:
        return chemicals_iapws95_tsat(Psat)
    except Exception as e:
        return f"Error: {str(e)}"

Online Calculator

Psat *

Water saturation pressure (Pa).