Pressure diagram

The key to understanding dewatering by air displacement is the capillary pressure diagram. Figure 6 presents an example typical for a fine coal suspension there is a minimum moisture content, about 12%, called irreducible saturation, which cannot be removed by air displacement at any pressure and a threshold pressure, about 13 kPa. 

P, V, h, and 5 interpolated and converted from Heat Exchanger Design Handbook, vol. 5, Hemisphere, Washington, DC, 1983 and reproduced in Beaton, C. F. and G. F. Hewitt, Physical Propeity Data for the Design Engineer, Hemisphere, New York, 1989 (394 pp-)- Other values compiled hy P. E. Liley An enthalpy-pressure diagram to 1000 psia, 250—500 F appears in J. Chem. Eng. Data 7, 1 (1962) 75-78. 

Values reproduced or converted from a tabulation by Tsykalo and Tabacbnikov in V A. Rabinovich (ed.), Theimophysical Propeities of Gases and Liquids, Stan-dartov, Moscow, 1968 NBS-NSF transl. TT 69-55091, 1970. Tbe reader may be reminded that very pure hydrogen peroxide is very difficult to obtain owing to its decomposition or instability, c = critical point. Tbe FMC Corp., Philadelphia, PA tech. bull. 67, 1969 (100 pp.) contains an enthalpy-pressure diagram to 3000 psia, 1100 K. 

FIO, 2-12 Enthalpy -log-pressure diagram for mercury. (Df awn from tabular data in footnote reference to Table 2-280.)... 

The 1993 ASHRAE Handbook—Fundamentals (SI ed.) contains a table at closer temperature increments and also an enthalpy-log-pressure diagram from 0.1 to 35 bar, —80 to 220 C. For tables and a chart to 500 psia, 480 F, see Stewart, R. B., R. T. Jacobsen, et al., Theimodynamic Propeities of Refrigerants, ASHRAE, Atlanta, GA, 1986 (521 pp.). For specific heat, thermal conductivity, and viscosity, see Theimophysical Propeities of Refigerants, ASHRAE, 1993. 

The 1993 ASHRAE Handbook—Fundamentals (SI ed.) gives a saturation table from —100 to 25.92 C and an enthalpy-log-pressure diagram from 0.1 to 80 har, —100 to 280 C. Equations and constants approximated to the 1985 ASHRAE tables are given bv Mecarvk, K. and M. Masaryk, Heat Recovety Sustems and CHF, 11,... 

The Hausbrand vapor-pressure diagram [127, 128] in Figure 8-40 is a useful approach for the steam distillation calculation. This particular diagram was prepared for six organic compounds and the corresponding water vapor pressure as (it - ps) for three system pressures of 760, 300, and 70 mm Hg versus temperature,... 

Figure 8-40. Hausbrand vapor-pressure diagram for various liquids and at three system steam pressures. A similar diagram can be constructed for other organic/hydrocarbon systems. Used by permission, Ellerbee, R. W., Chem. Eng. Mar. 4 (1974), p. 108.

Enthalpy-pressure diagram for water-steam 813 Enthalpy term, energy balance equation 74 Entropy 3,28... 

The NPT + test particle method [8, 9] aims to determine phase coexistence points based on calculations of the chemical potentials for a number of state points. A phase coexistence point is determined at the intersection of the vapor and liquid branches of the chemical potential versus pressure diagram. The Widom test particle method [7] of the previous paragraph or any other suitable method [10] can be used to obtain the chemical potentials. Corrections to the chemical potential of the liquid and vapor phases can be made, using standard thermodynamic relationships, for deviations... 

Figure D-4 Enthalpy-log pressure diagram for Refrigerant 22. Temperature in °F, volume in ft3/lb, entropy in Btu/(lb °R), quality in weight percent. (Reprinted by permission of El du Pont de Nemours Company, 1967.)...

The equilibrium vapor pressure (ps) can be measured by the barometric temperature measurement (BTM) and be converted into temperature by the water vapor pressure diagram (see Section 1.2.3). 

Figure 17. Impulse Versus Pressure Diagram for Constant Levels of Building Damage. (Reprinted with permission from ref. 15. Copyright 1983 Elsevier Science.)...

Joule-Thomson Inversion Temperature. The Joule-Thomson coefficient is a function of temperature and pressure. Figure 5.8 shows the locus of points on a temperature-pressure diagram for which p,jx. is zero. Those points are at the Joule-Thomson inversion temperature 7). It is only inside the envelope of this... 

F is at most two because the minimum value for p is one. Thus, the temperature and pressure can be varied independently for a one-component, one-phase system and the system can be represented as an area on a temperature versus pressure diagram. 

Fig. 2.4 The vapor pressure diagram of a dilute solution of the solute B in the solvent A. The region of ideal dilute solutions, where Raoult s and Henry s laws are obeyed by the solvent and solute, respectively, is indicated. Deviations from the ideal at higher concentrations of the solute are shown. (From Ref. 3.)...

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