Abstract
Thermal equation of state, along with the basic heat capacities are the most important documents needed to description the behavior of substances. Any other thermodynamic properties of a substance can already be deduced from these relations. The aim of this paper is to derive the dependence of energetic properties of water steam on the temperature and density from simple thermal equation of state based on original BWR thermal equation of state which describes the behavior of H2 O in the gaseous phase in region of usual pressures and temperatures with sufficient accuracy.
Highlights
Water and water vapor are commonly found in nature
The dependence of isochoric specific heat capacity on the volume can be obtained from the thermal equation of state [7] by the following procedure:
As in the case of specific heat capacity, it is chosen as the "known" state the idealized state (v o f, p o 0, so the enthalpy does not depend on volume, but only on the temperature [12]) and the temperature at which we know the value of the enthalpy (T0)
Summary
Water and water vapor are commonly found in nature. they are substances which are frequently used in various technical devices. As well as other multi-parameter equations, BWR equation can be only used to description of properties of substances for which there is sufficient amount of experimental data in wide range of pressures and temperatures. This requirement is fulfilled for water and water steam undoubtedly. The aim of this paper is to derive the equations for calculation enthalpy and entropy from simple thermal state equation derived in [8] and to control the accuracy of these values in comparison with the tabulated data according to formulation for scientific purposes IAPWS95 [2]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
