![]() The process of superheating in the T-s diagram is provided in the figure between state E and saturation vapor curve. In the superheater, further heating at fixed pressure results in increases in both temperature and specific volume. This requires the addition of another type of heat exchanger called a superheater, which produces the superheated steam. The process of superheating is the only way to increase the peak temperature of the Rankine cycle (and to increase efficiency) without increasing the boiler pressure. In order to evaluate the cycle thermal efficiency the enthalpy must be obtained from the superheated steam tables. As can be seen also wet steam turbines use superheated steam especially at the inlet of low-pressure stages. The process of superheating of water vapor in the T-s diagram is provided in the figure between state E and saturation vapor curve. Rankine Cycle – Thermodynamics as Energy Conversion Science Actually, the substances we call gases are highly superheated vapors. ![]() The pressure and temperature of superheated vapor are independent properties, since the temperature may increase while the pressure remains constant. Superheated vapor or superheated steam is a vapor at a temperature higher than its boiling point at the absolute pressure where the temperature is measured. The dry saturated vapor is characterized by the vapor quality, which is equal to unity. If a steam exists entirely as vapor at saturation temperature, it is called saturated vapor or saturated steam or dry steam.
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