Saturated steam, properties

Residue Curve Maps for Reactive Mixtures 461 Heat-Exchanger Design 474 Materials of Construction 483 Saturated Steam Properties 487 Vapor Pressure of Some Hydrocarbons 489 Vapor Pressure of Some Organic Components 490 Conversion Factors to SI Units 491... 

The temperature in the jacket can be determined from the steam tables knowing the pressure in the jacket, P. Since the mechanism for heat transfer in the steam jacket is condensation, saturated steam properties can be used and... 

Va.por Pressure. Vapor pressure is one of the most fundamental properties of steam. Eigure 1 shows the vapor pressure as a function of temperature for temperatures between the melting point of water and the critical point. This line is called the saturation line. Liquid at the saturation line is called saturated Hquid Hquid below the saturation line is called subcooled. Similarly, steam at the saturation line is saturated steam steam at higher temperature is superheated. Properties of the Hquid and vapor converge at the critical point, such that at temperatures above the critical point, there is only one fluid. Along the saturation line, the fraction of the fluid that is vapor is defined by its quaHty, which ranges from 0 to 100% steam. 

IB. Properties of saturated steam (Centigrade and Fahrenheit units) 810... 

Solution The conditions for the inlet steam are fixed, but the conditions of the outlet steam will depend on the performance of the turbine. First, estimate the steam flowrate from the process heating duty. A good approximation is that the sum of the heat content of the superheat and latent heat is constant from inlet to outlet. At the expander inlet, the heat content of the superheat is higher than that of the outlet, but the latent heat is lower in the inlet than in the outlet. The two trends tend to cancel each other out, with the total heat content of superheat and latent heat being approximately constant across the turbine. From steam properties, the enthalpy of the superheated steam HSup, enthalpy of the saturated steam HSat and enthalpy of the saturated condensate Hi at 100 barg are ... 

Table 44-1 presents the boiling point, freezing point, and laiucu properties or water in both metric and English units is a quick reference to the properties of water from O C to lOOX and shows the important properties of saturated steam from tts freezing point to the critical point... 

All of the chemical evidence that can be marshalled indicates that wood fiberboard manufacture exploits the thermoplastic properties of lignin. Defibering is effected by the thermal softening of lignin in the middle lamella at saturated steam pressures above 130C. Interfelted fiber mats are consolidated with or without densification pressure by the thermoplastic fusion of lignin-rich fiber surfaces at high board conversion temperatures. 

Table C.3 Properties of Saturated Steam (English Units)...

For each of the estimates, the procedure consists of using correlation equations that have been derived by regression analysis of the properties of saturated steam, as discussed in more detail under Related Calculations. The temperatures are to be entered into the equations in degrees Fahrenheit and the pressure (for the boiling-point example) in pounds per square inch absolute. The results are likewise in English units, as indicated below. These correlations are valid only over the range 32 to 440°F. 

Related Calculations. These equations are presented in Dickey, D.S., Practical Formulas Calculate Water Properties, Parts 1 and 2, Chem. Eng., Sept. 1991, pp. 207, 208 and November 1991, pp. 235, 236. That author developed the equations via regression analysis of the properties of saturated steam as presented in Perry s Chemical Engineers Handbook, 6th ed., McGraw-Hill. The maximum error (compared to tabulated values) and sample standard deviation of the correlations are as follows ... 

For many years, compilations of physical properties of liquid water, saturated steam, and superheated steam issued in steam tables have been standard references for mechanical and chemical engineers involved with steam cycles for electrical power generation. Steam tables are contained in Tables B.5-B.7 of this text. We recommend that you look at these tables as we describe what you can find in them. 

Table B.5 lists properties of saturated liquid water and saturated steam at temperatures from 0.01°C (the triple point temperature) to 102°C. The following properties can be determined for each tabulated temperature (and for intermediate temperatures by interpolation) ...

Table B.6 lists the same properties as Table B.5, except that pressure is the first column and temperature the second and the table covers a much broader range of temperatures and pressures. Tables B.5 and B.6 are commonly referred to as the saturated steam tables.

When you look up a pressure in the first column of Table B.7, you will find just below it in parentheses the boiling point temperature and in Columns 2 and 3 the properties of saturated liquid water and saturated steam at that pressure. If you are at a point in the superheated steam region, you can move all the way to the left to determine the saturation temperature at the same pressure, or the dew point of the superheated steam. 

Table B.5 Properties of Saturated Steam Temperature Table S...

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