Definition of the absolute table uncertainties

In this table, one line is to be entered for each table uncertainty (TUS) of water and steam, respectively, used in one of the equations on the sheet “Auxiliary conditions”. When carrying out a calculation, EBSILON®Professional determines the confidence intervals of all these table uncertainties (each time the 95% confidence interval) and the correlations of all these table uncertainties among each other.

One line is allocated to each water/steam table uncertainty (TUS):

Number: is assigned by the system
Active: Only active entries checked off here are used.
Name: Name of the variables for the table uncertainty (begins with :: -> name of a component 46)
Type of the uncertainty

Uncertainty of the specific enthalpy for pressure value 1 and for temperature value 2
Uncertainty of the specific enthalpy for pressure value 1 and for steam mass fraction value 2
Uncertainty of the saturation temperature for pressure value 1

Value 1: Name of a variable for a pressure (begins with :: à name of a component 46)
Value 2: Depending on the type of the table uncertainty:

Type a): Name of a temperature variable (begins with :: à name of a component 46) or
Type b): Steam mass fraction value (value between 0 and 1) or
Type c): empty

Comment: Text to be entered by the user for better clarity

No data are to be entered for the table uncertainties of other substances (air, flue gas, natural gas as in Sheet III of VDI 2048).

The table uncertainties for air and flue gas are represented as variables for the individual components of the gas mixture. The values are to be determined according to VDI 4670, Chapter 2.4 and Table F1, respectively. These table uncertainties are relative uncertainties.

The totals table uncertainties of natural gas are represented as variables. These totals table uncertainties are relative uncertainties, too.

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