Saturated Steam Temperature Table

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

Prom the saturated steam temperature. table, we have at 100°C and 0.101 35 MPa... 

From the saturated steam temperature table at 100°C, the equilibrium pressure is 0.101 35 MPa and... 

Testing of pressure relieving spring loaded valves at atmospheric temperature requires an adjustment in set pressure at ambient conditions to compensate for higher operating temperatures. For process services see Table 7-UV and for saturated steam, use Table 7-1B. 

Table 1.1 Saturated steam temperatures at various boiler pressures...

What is required here is the lowest saturated steam temperature that satisfies the AT constraint. Data from Tables F.2 and B.2 lead to the following ... 

PROCESS MODELLING AND SIMULATION Table 3.1 Saturated steam temperature... 

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. 

Although hydration under hydrothermal conditions may be rapid, metastable iatermediate phases tend to form, and final equiUbria may not be reached for months at 100—200°C, or weeks at even higher temperatures. Hence, the temperatures of formation given ia Table 6 iadicate the conditions under saturated steam pressure that may be expected to yield appreciable quantities of the compound, although it may not be the most stable phase at the given temperature. The compounds are Hsted ia order of decreasiag basicity, or lime/siHca ratio. Reaction mixtures having ratios C S = 1 yield xonotHte at 150—400°C. Intermediate phases of C—S—H (I), C—S—H (II), and crystalline tobermorite ate formed ia succession. Tobermorite (1.13 nm) appears to persist indefinitely under hydrothermal conditions at 110—140°C it is a principal part of the biader ia many autoclaved cement—silica and lime—silica products. 

Note that the method described assumes that the high-pressure condensate has not been sub-cooled. If any subcooling has taken place, then the figure taken for the enthalpy of water at the higher pressure is reduced by the amount of sub-cooling. The chart or table can still be used if the upstream pressure is taken as that corresponding to saturated steam at the same temperature as the sub-cooled condensate. 

Table 7-1B Set Pressure Compensation for Saturated Steam Service Safety-Relief Valves Between Atmospheric Test Temperature and Actual Operating Temperature ...

Component B is the desired product of the reaction, and the aim is to find the optimum batch time and temperature to maximise the selectivity for B. Saturated steam density data are taken from steam tables and fitted to a polynomial. The model and data for this example are taken from Luyben (1973). 

Assuming that the steam is dry and saturated at 205 kN/m2, then from the Steam Tables in the Appendix, the steam temperature = 394 K at which the total enthalpy = 2530 kJ/kg. 

Derive an equation for the temperature-time relationships of a medium in a fermentor during indirect heating by saturated steam (Figure 10.1c). Use the nomenclature given in Table 10.1. 

Various curing conditions are followed for various product lines. The following are temperature-steam pressure equivalents of saturated steam at sea level. Source Steam Tables of Marks and Davis, Longmans Green Co. 

The direct injection of steam into the medium can be assumed to follow the hyperbolic temperature-time profile of Eq. (8.9), which can be used to calculate the time required to heat the medium from 25°C to 122°C. From the steam table (Felder and Rousseau, 1986), the enthalpy of saturated steam at 345 kPa and water at 25°C is 2,731 and 105 kj/kg, respectively. Therefore, the enthalpy of the saturated steam at 345 kPa relative to raw medium temperature (25°C) is... 

The most common heat carrier for heating industrial reactors is steam, providing an efficient and simple means. The efficiency of steam is due to its high latent heat of condensation (AHv = 2260 kj kg1 at 100 °C). For saturated steam, the temperature can be controlled by its pressure. Some values are presented in Table 9.1. The pressure and latent heat of evaporation corresponding to a given temperature may easily be estimated using Regnault law ... 

Table 9.1 Temperature as a function of pressure for saturated steam.

For the applications that involve water and steam, specific volume can be found using "Saturated Steam Tables," which list the specific volumes for water and saturated steam at different pressures and temperatures. 

Each of these equations may be solved for x. Given a final temperature and the corresponding vapor pressure, values for Svap, Sliq, Hvap, and Hliq are found from the table for saturated steam, and substitution into the equations for x produces two values. The required pressure is the one for which the two values of x agree. This is clearly a trial process. For a final trial temperature of 120 degC, the following values of H and S for saturated liquid and saturated vapor are found in the steam table ... 

TABLE 6.18 Equivalent Saturated Steam Values for Superheated Steam at Various Pressures and Temperatures... 

From the steam table, the enthalpies of saturated steam at 345 kPa and water at 25°C are 2731 and 105 kJ/kg respectively. Therefore the enthalpy of saturated steam at 345 kPa relative to raw medium temperature 25°C is... 

Use the saturation-temperature steam table. Study of the saturation-temperature table shows that there is no temperature value listed for 261°F (127.2°C). Therefore, it will be necessary to interpolate between the next higher and next lower tabulated temperature values. In this instance, these values are 262 and 260°F (127.8 and 126.7°C), respectively. The temperature for which properties are being found (261°F or 127.2°C) is called the intermediate temperature. ... 

Use the superheated-steam table. Choose the superheated-steam table for steam at 1000°F (537.9°C) and 2.6150 ft3/lb (0.16 m3/kg) because the highest temperature at which saturated steam can exist is 705.4°F (374.1°C). This is also the highest temperature tabulated in some saturated-temperature tables. Therefore, the steam is superheated when at a temperature of 1000°F (537.9°C). 

Determine the initial steam temperature from the steam tables. Enter the saturation-pressure table at 400 psia (2758.0 kPa) and read the saturation temperature as 444.59°F (229.2°C). 

Determine the final steam pressure. The final steam temperature (1000°F or 537.8°C) and the final steam volume (2.6150 ft3/lb or 0.16 m3/kg) are known. To determine the final steam pressure, find in the steam tables the state corresponding to the preceding temperature and specific volume. Since a temperature of 1000°F (537.8°C) is higher than any saturation temperature (705.4°F or 374.1°C is the highest saturation temperature for saturated steam), the steam in state 2 must be superheated. Therefore, the superheated-steam tables must be used to determine P2. 

The dissipated work potential is small as we mix two saturated steams at relatively low temperature levels. Mixing process 2 Available data from the steam tables are... 

Example 3 One-Dimensional, Unsteady Conduction Calculation As an example of the use of Eq. (5-21), Taole 5-1, and Table 5-2, consider the cooking time required to raise the center of a spherical, 8-cm-diameter dumpling from 20 to 80°C. The initial temperature is uniform. The dumpling is heated with saturated steam at 95°C. The heat capacity, density, and thermal conductivity are estimated to be c = 3500 J/(kg K), p = 1000 kg/m3, and k = 0.5 W/(m K), respectively. 

Coreflood Tests With Oil-Free Cores. The coreflood experiments were at first performed at ambient temperature and then extended to hot water conditions at 110 C as an approach to saturated steam conditions. Pilot experiments with the light mid-continent crude were extended to the heavier California crude oils, with steamfloods at saturated steam conditions to test the steam stability of "emulsion blocks" created with the heavier oil. The data for these coreflood tests are summarized in Table V. 

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