Artigo de peri??dico
An R-package for water and steam properties for scientific and general use
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1741-6361
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12
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22.00
Autor
BAPTISTA FILHO, B.D.
CABRAL, E.L.L.
BARROSO, A.C.O.
Resumen
The International Association for the Properties of Water and
Steam (IAPWS) develops formulations for the calculation of thermophysical
properties of water as a function of different combinations of temperature,
density, pressure, enthalpy, and entropy. These properties are useful for
scientists and nuclear, chemical, and mechanical engineers who analyse
experimental data or are involved with projects and equipment development,
like heat exchangers, turbines, or nuclear power reactors. The IAPWS-95
formulation solves the fundamental equation of Helmholtz free energy as a
function of temperature and density. This paper gives a description of how
these equations are solved and exemplifies the use of a package developed for
the free platform R. The IAPWS95 package was developed to help users to get
access to the IAPWS-95 formulation in a free software environment which is
growing exponentially. Transport properties were programmed using other
IAPWS releases. The examples consider the uncertainty analysis of thermal
parameters of a nuclear power reactor and the preparation of tables and graphs
of water properties.