How to read steam table pdf

Steam Tables and Mollier Diagram 1. Definition Steam is the vapour form of water and is invisible when pure and dry. It does not obey the laws of perfect gases, until it is perfectly dry. When the dry steam is further heated, ii behaves more or less like a perfect gas. The steam is, generally, used as a working substance in the operation of steam Dry Saturated Steam Line. The dry saturated steam line shows steam at its saturation temperature, and depicts finite properties relating only to the dry saturated condition of steam. Set your preferences for these steam tables. Note: - You cannot use commas (,) as decimal points. Please use periods (.) Example: 1.02 not 1,02. Previous - Wet This can help you along the way to reading them with ease: P - Pressure of the system T - Temperature (saturation point) vg - Specific volume of saturated steam hf - Specific enthalpy of water (sensible heat) hfg - Specific enthalpy of evaporation (latent heat) hg - Specific enthalpy of steam (total heat) What type of pressure is used? About These Tables While preparing these tables, the following modifications were made: The nomenclature is different, and so is the tabular format. Density (ρ)is not tabulated, only specific volume (v)is tabulated. Values of thermal (internal) energy (u =h −pv)are computed and tabu-lated. Please note: The tabulation is restricted to 1000 es. The total heat of dry saturated steam or enthalpy of saturated steam is given by sum of the two enthalpies h f +h fg (Refer Table 3.1 and figure 3.1). When the steam contains moisture the total heat of steam will be h g = h f + χh fg where χis the dryness fraction. The temperature of saturated steam is the same as the water from which it SATURATED STEAM TABLES bar g psi °C °F kJ/kg btu/lb kJ/kg btu/lb kJ/kg btu/lb m³/kg ft³/lb 0.00 0.0 100.0 212.0 419.0 180.2 2257.0 970.3 2676.0 1150.5 1.673 26.80 STEAM STEAM. SOME USEFUL CALCULATIONS To calculate actual steam production from the "from & at" rating Steam tables are defined as the thermodynamic data that contain the properties of water or steam. These data are commonly used by engineers. It is normally used to obtain the following properties using steam pressure for saturated steam temperature and saturated temperature for saturated steam pressure. The values of internal energy (uf) of water in saturated liquid state and values of internal energy (ug) of steam in saturated vapor state are calculated by using following relations. uf = hf - pvf and ug = hg - pvg. 21.1.1.2. Extensive properties of wet steam i.e. in the liquid + vapor region. For wet steam, the values of specific volume (v Pressure Tables • Use the pressure table for when you are given the pressure of a saturated mixture • Like the temperature table, use the pressure and the quality to determine the other properties • E.g. For R134a at 300kPa and a quality of 0.25, the specific volume is: kg v m v v v x v v f g f 3. 0175. 0007737 . 25 * (. 0677 . 0007737 Thermodynamic Properties Tables and Charts • Thermodynamic Properties of Steam--- 2 • Thermodynamic Properties of Refrigerant R134a--- 15 • Thermodynamic Properties of Carbon Dioxide R744--- 25 Ideal Gas Process Derivation • Specific Heat Capacities of an Ideal Gas--- 37 • The Adiabatic Process of an Ideal Gas--- 39 Ideal Gas Tables • Properties of Various Ideal Gases (at 300 K)--- 40 Appendix A.4 Saturated Steam Tables: Metric Units Enthalpy (MJ/kg) Absolute Saturated (MJ/kg) Saturated Temperature C