About Steam turbine generator outlet temperature standard
For a steam turbine-generator to operate at its optimum level of thermal performance, it must achieve a high initial level of performance and must be able to sustain thermal performance over time. This is best achieved by an ongoing program of evaluation and assessment of ther-mal performance data.
For a steam turbine-generator to operate at its optimum level of thermal performance, it must achieve a high initial level of performance and must be able to sustain thermal performance over time. This is best achieved by an ongoing program of evaluation and assessment of ther-mal performance data.
The steam turbine is a turbine in which the potential energy of heated and compressed steam produced in a special device, a steam generator, or steam of natural origin (for example, from geothermal springs) is converted into kinetic energy (when the steam expands in the turbine blade cascades) and then into mechanical work on the rotating shaft.
The highest inlet steam temperature currently applied to actual supercritical pressure and USC steam turbines is between 566°C and 620°C. However, a next-generation A-USC pressure steam turbine project is aiming at 700°C-class inlet temperature application, as a national development project.
The purpose of this document is to provide guidance on the development of steam purity limits to assist operators of a broader suite of generating plants in minimizing equipment damage and loss of efficiency, and in maximizing plant reliability.
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6 FAQs about [Steam turbine generator outlet temperature standard]
What is the inlet temperature of a steam turbine?
The highest inlet steam temperature currently applied to actual supercritical pressure and USC steam turbines is between 566°C and 620°C. However, a next-generation A-USC pressure steam turbine project is aiming at 700°C-class inlet temperature application, as a national development project.
What is the enthalpy of a turbine inlet steam?
Conditions are: Main Steam (Turbine Inlet) Pressure — 2000 psia Main Steam Temperature — 1000 o F Turbine Outlet Steam Pressure — Atmospheric (14.7 psia) Call this Example 1. The steam tables show that the enthalpy of the turbine inlet steam is 1474.1 Btu per pound of fluid (Btu/lbm).
How can a steam turbine-generator achieve optimum thermal performance?
For a steam turbine-generator to operate at its optimum level of thermal performance, it must achieve a high initial level of performance and must be able to sustain thermal performance over time. This is best achieved by an ongoing program of evaluation and assessment of ther-mal performance data. This program has a three-fold purpose.
How does steam inlet pressure affect turbine performance?
Turbine steam inlet pressure is a major parameter affecting turbine performance. To retain the design efficiency the steam inlet pressure should be maintained. Lowering steam inlet pressure reduces turbine efficiency and increases steam consumption.
How efficient is a steam generation system with isentropic turbine?
A basic steam generation system with isentropic turbine. In reality, turbines are typically 80 to 90 percent efficient, but this factor does not need to be included here to show the importance of condenser performance. Conditions are: Main Steam (Turbine Inlet) Pressure — 2000 psia Main Steam Temperature — 1000 o F
What is a regenerative turbine heat rate?
2.1.7.2.3 TURBINE HEAT RATE APPLICATION. The turbine heat rate for a regenerative turbine is defined as the heat consumption of the turbine in terms of "heat energy in steam" supplied by the steam generator, minus the "heat in the feedwater" as warmed by turbine extraction, divided by the electrical output at the generator terminals.