Download or read book An Investigation of Enthalpy Data for Water and Water Vapor in the Critical Region written by E. S. Nowak and published by . This book was released on 1961 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enthalpy values were derived from the available experimental results on the specific heat at constant pressure. The values so derived are in excellent accord with direct measurements of enthalpy. It was also possible to construct an isenthalpic diagram for water and water vapor in the critical region.
Download or read book An Analysis of Specific Heat Data for Water and Water Vapor in the Critical Region written by E. S. Nowak and published by . This book was released on 1961 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review of the available data for the specific heat at constant pressure of water and water vapor is given for pressures from 14.22 to 4300 psia and temperatures from 680 to 800 deg F. In addition, a description is given of the various experimental techniques employed by different investigators to carry out measurements of this property.
Download or read book An Investigation of Certain Thermodynamic and Transport Properties of Water and Water Vapor in the Critical Region written by E. S. Nowak and published by . This book was released on 1959 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Study of the existing thermal conductivity and viscosity data suggests that the Russian work is the most consistent. However, it appears that the empirical equations proposed for interpolation do not adequately represent the data in the critical region. No attempt has been made to derive thermodynamic functions or to analyze the transport data.
Download or read book An Investigation of Certain Thermodynamic and Transport Properties of Water and Water Vapor in the Critical Region written by E. S. Nowak and published by . This book was released on 1954 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Equation of State for Water and Water Vapor in the Critical Region written by E. S. Nowak and published by . This book was released on 1961 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A parametric equation of state was derived for water vapor in the critical region. It is valid for pressures ranging from 3000 to 4000 psia, specific volumes from 0.8 V/sub c/ to 2 V/sub c/ and temperatures from saturation to 752 degrees. The equation satisfies the boundary conditions at the critical point. The maximum derivation between computed and measured values of pressure of three parts in one thousand coincides approximately with the over-all uncertainty in Pressure-Volume-Temperature measurements. By utilizing certain concepts in "Clausius Theorem of the Virial" the size of water molecule was estimated as 2.61 A from P-V-T data. This is in fair agreements with other estimated values which ranged from two to five Angstroms.
Download or read book AN ANALYSIS OF SPECIFIC HEAT DATA FOR WATER AND WATER VAPOR IN THE CRITICAL REGION Technical Report written by and published by . This book was released on 1961 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review of the available data for the specific heat at constant pressure of water and water vapor is given for pressures from 14.22 to 4300 psia and temperatures from 680 to 800 deg F. ln addition a description is given of the various experimental techniques employed by different investigators to carry out measurements of this property. Deviations of up to 20% are shown to be in existence between the measured values of specific heat of different investigators. The estimated apparent over-all error in the specific heat measurements was found always to be within 5%. In view of the actual deviation it would appear that the various estimates that were made on the apparent over- all error are somewhat optimistic. An attempt was made to show that excessive random and systematic errors may arise in the critical region when values obtained from mean specific heat measurements are considered as being identical to the instantaneous values oi specific heat. There are no specific heat formulations C/sub p/ = C/sub p/ (P, T), in existence for the part of the critical region where the specific heat first increases with tennperature, attains a maxi mum finite value, and then subsequentiy decreases with temperature. Consequently, the smoothed values of the specific heat at constant pressure of various steam tables were derived by graphical interpolation of different experimental data. Deviations between the various smoothed data for the specific heat at constant pressure approach and even exceed 30%. This is especially true in the regions of maxima of various isobars. These large deviations are due, in part, to the error introduced by graphical interpolation and also to the previously mentioned deviations among the experimental data. The specific heat was derived in the critical region from P-V-T data. The deviations between the derived and measured values were generally between 10 to 20%. Near the critical point, at supercritical pressures, and in the region of maximum specific heats along various isobars, the deviations were larger. However, except for one point, even these deviations were entirely within 40%. Finally it is shown that the pressure and temperature relation corresponding to the maximum values of specific heat along isobars is different to that corresponding to specific heat along isotherms. This is significant insofar as it was previously thought by other investigators that the locus of points on a pressure temperatare diagram defining (partial delta C/sub P// partial delta P)sub T/ = 0 was identical to the locus of points defining (partial delta C/sub P// partial delta T)/sub P/ = 0. The physical significance of the region enclosed by the locus of points on a pressure temperature diagram defining (partial delta C/sub P// partial delta T)sub P/ = 0 and enclosed by the above two curves is the boundary between the liquid and vapor phases in the supercritical region. (auth).
Download or read book NBS Special Publication written by and published by . This book was released on 1970 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Equilibrium Critical Phenomena in Fluids and Mixtures written by Stella Michaels and published by . This book was released on 1970 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AN INVESTIGATION OF CERTAIN THERMODYNAMIC AND TRANSPORT PROPERTIES OF WATER AND WATER VAPOR IN THE CRITICAL REGION written by and published by . This book was released on 1958 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An accurate knowledge of thermodynamic and transport properties of water in the critical region is required in order to analyze future power cycles, nuclear reactor configurations, and other types of heat transfer apparatus. Preliminnry investigations showed that this was rot possible with presently existing tabulations. Experimentel data from volumetric viscosity and thermal conductivity studies were therefore selected and retabulated. Smoothings of these data are described and, for the first time, a tabulation at close intervals of pressure and temperature of the volumetric data is possible for steam in the critical region. A graphical presentation is given of volumetric data from 700 to 750 deg F. An important result of this study was that excellent agreement existed between the many P-V-T measurements for this substance even though some of the data was obtained many years ago. Differences occurring between the tabulated data of various steam tables were found to arise from the use of inexact equations of state or interpolation techniques rather than from faulty primary data. New P-V-T data were derived from measurements of other investigators, by a graphical technique and it is estimated that it yielded pressure values accurate to some five parts in ten thousand except in the subcooled liquid region (for specific volumes below 0.040 ftsup 3/lb), where the uncertainty may be some twenty parts in ten thousand. Study of the existing thermal conductivity and viscosity data suggests that the Russian work is the most consistent. However, it appears that the empirical equations proposed for interpolation do not adequately represent the data in the critical region. No attempt has been made to derive thermodynamic functions or to analyze the transport data. (auth).
Download or read book U S Government Research Reports written by and published by . This book was released on 1962 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Coefficient of Volume Expansion for Water and Water Vapor in the Critical Region written by E. S. Nowak and published by . This book was released on 1961 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A tabulation is given for the coefficient of volume expansion for water and water vapor along eleven isobars in the critical region encompassed by pressures from 3000 to 4000 psia and temperatures from 690 to 750 deg F. Graphical techniques were employed to derive these values from precise P-V-T data. The over-all error in the derived values of the volume expansion coefficient was estimated to be within 5%. However, in the region of maximum values for the coefficient of volume expansion along the various isobars, the uncertainty in the derived values is estimated to be between 5 to 30%.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1973 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High pressure Equation of State Bibliography and Index 1925 1962 written by Stephen G. Brush and published by . This book was released on 1963 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atomic Energy Research Reports for Sale by the U S Department of Commerce Office of Technical Services written by Business and Defense Services Administration and published by . This book was released on 1963 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book List written by and published by . This book was released on 1948 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Power Reactor Technology written by and published by . This book was released on 1957 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 1970 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
