Steam table

Press Lb/Sq. In. P Temp Fahr t Sat. Liquid vf Evap Vfg Sat. Vapor V g Sat. Liquid hf 

Temp Fahr t Lb per Sq In. P Sat. Liquid Vf Evap vfg Sat. Vapor Vg Sat. Liquid hf Evap fg Sat. Vapor h g Sat. Liquid sf Evap Sf fg Sat. Vapor s g Temp Fahr t 

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Heat flow required from the turbine exhaust = 21.9 MW From steam tables, inlet conditions at T, = 300°C and Pi = 41 bar are /ii = 2959kJkg ... 

Turbine outlet conditions for isentropic expansion to 150°C from steam tables are... 

Cost of 41-barg steam. From steam tables, for 41-barg steam at 400°C,... 

Cost of 10-barg steam. Here, 41-barg steam is now expanded to 10 barg in a steam turbine. Details of steam turbine calculations were gpven in Sec. 6.7. From steam tables, inlet conditions at 41 barg and 400 C are... 

From steam tables, the outlet temperature is 251°C, which is superheated by 67°C. Although steam for process heating is preferred at saturated conditions, it is not desirable in this case to desuperheat by boiler feedwater injection to bring to saturated conditions. If saturated steam is fed to the main, then the heat losses from the main will cause a large amount of condensation in the main, which is undesirable. Hence it is better to feed steam to the main with some superheat to avoid condensation in the main. 

From steam tables, the outlet temperature is 160°C, which is superheated by 16°C. Again, it is desirable to have some superheat for the steam fed to the main to avoid condensation in the main. 

Udel is a slightly yellow but tianspaient engineering thermoplastic. It has low flammability and smoke emission and good electrical properties. It has excellent resistance to water, steam, and alkaline solutions. Specific uses for Udel iaclude microwave cookware, beverage dispensers, coffee brewers, cookware, hair dryers, com poppers, and steam table trays. Its steam resistance makes it particularly fit for a dishwasher environment. Properties of polysulfone resias ate given ia Table 11. 

International Steam Table) inch of water (39.2 F) newton/meter +02 2.490 82... 

Calculated hy P. E. Liley from various steam tables for the lower temperatures and from Paper B-11 hy P H. Kesselman and Yu. I. Blank, 7tli. Int. Conf. Properties of Steam, Tokyo, 1968, for the higher temperatures. 

Extracted aud coudeused from 1967 ASME Steam Tables. Copytigbt reserved. Reproduced by permission. 

Steam Rate Enthalpy data can be obtained from Mollier diagrams or from steam tables (see Sec. 2), from which the theoretical steam rate can be calculated. For example, a throttle inlet condition of 4137 kPa (600 psig) and 399° C (750° F) gives an enthalpy of 3.2 MJ/kg (1380 Btu/lb), and if the end point is at 348 kPa (50 psig), then adiabatic expansion is to 2.69 MJ/kg (1157 Btu/lb). This gives 0.52 MJ/kg (223 Btu/lb) available, and the theoretical steam rate is calculated from the Btu equivalent per Idlowatthour or horsepower-hour ... 

Equation 2 will yield the same result as the Theoretical Steam Rate Tables (Reference 10). Therefore, this is a handy way of getting theoretical steam rates when only a set of steam tables sans Mollier diagram are available. 

The latent heat of vaporization in Figure 28 is expressed in units of Btu per pound of water evaporated. The value is taken from the steam water vapor at various temperatures (i.e., from the steam tables). 

This equation is seldom used, because the tables of the thermodynamic properties of fluids (steam tables) allow the values of the fluid/gas vapor to be accurately obtained. 

Water properties can be found from tables, such as the VDl-Wasser-dampftafeln The NBS/NRC Steam Tables the ASHRAE and CIBSE Guides or Thermodynamic and Transport Properties of Fluids by Mayhew and Rodgers. First we dimension d, and now Eq. (4.65) is... 

Steam tables Tables containing the ther modynamic properties of steam over a range of pressures and superheat. 

The latent heat of vaporization for hydrocarbon compounds is given in Table 2-9. The latent heat of vaporization of water is given by hfj, in the steam table (Table 2-6). 

Read the specific volume of steam at conditions, from steam tables. 

Using the example of Reference [6], assume a pump with characteristic curve and added temperature rise data as showm on Figure 3-59 is to handle boiler feed water at 220°F, with a system available NPSH = 18.8 feet. The v apor pressure of w ater at 220°F is 17.19 psia from steam tables and the SpGr = 0.957. Correcting the 18.8 feet NPSHa psia = 18.8 (l/[2.31/0.957)] = 7.79 psia at 220°F. 

From steam tables (or fluid vapor pressure tables), read at 24.98 psia (for w ater of this example), temperature = 240°F. 

The temperature of the condensing steam at 1.0 in. Hg is 79°F (from steam-tables). 

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