Steam pipes and pressure drop diagrams - imperial and metric units Enthalpy-entropy diagram for water and steam Latent heat is the heat when supplied to or removed from air results in a change in moisture content - the temperature of the air is not changed. Amount of flash steam generated at different pressures - kN/m 2 When condensate leaves the steam traps - flash steam is generated. When condensate passes steam traps - flash steam is generated Tutorial to the basic physics behind flash steam generationįlash Steam Generation - Imperial Units (psig) When flash steam is generated and vented to the surroundings a considerable amount of energy is lostįlash Steam Generation - Fundamental Physics Evaporation of water from a water surface - like a swimming pool or an open tank - depends on water temperature, air temperature, air humidity and air velocity above the water surface - online calculator. Wet steam, the dryness fraction and enthalpy Enthalpy of steam superheated to temperatures above boiling point An introduction to the basic design of steam heating systems
Flash steam produced in condensate pipe lines Steam systems carries heat through pipes from the boiler to consumers as heat exchangers, process equipment etc. Sizing steam and condensate pipes - pressure loss, recommended velocity, capacity and more Thermodynamics of steam and condensate applications Flash steam generation - thermodynamic fundamentals, heat loss, energy recovery and more Steam & condensate systems- properties, capacities, pipe sizing, systems configuration and more The total specific enthalpy of the steam (or heat required to evaporate water to steam) at atmospheric pressure and 212 oF can be summarized to Therefore, at 0 psig - the specific enthalpy of evaporation is 970 Btu/lb.
Therefore, at 0 psig and 212 oF - the specific enthalpy of water is 180 Btu/lb.Īnother 970 Btu/lb of energy is required to evaporate the 1 lb of water at 212 oF to steam at 212 oF. 180 Btu/lb of energy is required to heat 1 lb of water to saturation temperature 212 oF. Vacuum steam is the general term used for saturated steam at temperatures below 100☌.Įxample - Boiling Water at 212 oF and 0 psigĪt atmospheric pressure - 0 psig - water boils at 212 oF.Note! Gauge Pressure = Absolute Pressure - Atmospheric Pressure Properties of Saturated Steam - SI Units.At the critical point it is no longer referred to water or steam and it is not possible keep the water and steam apart. No change of state occurs when pressure increases above the critical point or when heat is added. 1) Atmospheric pressure is used for the table except for 2)Ģ) Critical Point - At 3206.2 psia and 705.40 oF the vapor and liquid are indistinguishable.
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