Specific Volume of Liquid Water from (253 to 323) K and Pressures up to 350 MPa by Volumetric Measurements

Abstract

Water science is fundamental to investigate physical and biological phenomena. The volumetric properties of liquid water have been studied for different pressure and temperature conditions covering the whole domain of water in the liquid state. Nevertheless, the uncertainty of the existing data should be reduced. In this work, the specific volume v of water was determined by measuring the volume change Δv with pressure from a reference state vref at a given temperature, that is: v = vref + Δv. The purpose was to provide new v values to enrich the water properties database. A variable-volume piezometer with a solid-piston volumometer based on a linear variable differential transformer was employed. About 200 pvT points were determined between (253 and 323) K for pressures up to 350 MPa; the initial reference for the specific volume vref was calculated from the equation of state of the International Association for the Properties of Water and Steam (IAPWS-95 formulation). The relative combined uncertainty (...