Development and Verification of a Transient Analysis Tool for Reactor System Using Supercritical CO₂ Brayton Cycle as Power Conversion System

Table 2

Relative prediction error of the developed CO₂ property package compared to NIST REFPROP 9.0.

CO2 Property	Symbol	Regions	Relative error
Saturated liquid enthalpy		-	±0.015%
Saturated vapor enthalpy		-	±0.009%
Temperature	T	subcooled area	-0.05% to 0.1%, 99% of which is within relative errors of ±0.05%
		superheated region 1	±0.2%, 99% of which is within relative errors of ±0.1%
		superheated region 2	-0.1% to 0.25%, 99% of which is within relative errors of ±0.05%
Specific volume	v	subcooled area	-0.5% to 1%, 99% of which is within relative errors of ±0. 5%
		superheated region 1	-1% to 4%, 99% of which is within relative errors of ±1%.
		superheated region 2	-0.5% to 0.1%, 95% of which is within relative errors of ±0.1%
Dynamic viscosity	μ	-	-1.5% to 0.5%, 99% of which is within ±0.5%