Abstract
At present, the calculation method of steam extraction efficiency of power plant turbine have five methods: heat balance method, equivalent enthalpy drop method, cyclicfunctional method, composite structure method and matrix method. In this paper, a 600MW grade subcritical thermal power plan is take as an examplefor comparing the calculation by the simple heat balance method and the equivalent enthalpy drop method. The result shows that the computational results of simple heat balance method agree with equivalent enthalpy drop method. So simple heat balance method can be used to replace equivalent enthalpy drop method in order to reduce calculation amount in practicalapplication.
Highlights
The efficiency of steam extraction is the percentage between lost work and steam extraction heat when steam extraction is used for steam supply or heat supply
Heat balance method is a basic analysis methods of thermodynamic systems for coal fired power plants. It is a simple steam-water mass balance and energy balance method. It focuses on singly heater, the steam-water mass balance and energy balance formulas of every heater are derived in order to calculate the steam extraction coefficients
The equivalent enthalpy drop method is widely used to calculate the steam extraction efficients, So the principles won'tbe covered in this paper
Summary
The efficiency of steam extraction is the percentage between lost work and steam extraction heat when steam extraction is used for steam supply or heat supply It can be calculated by heat balance method, equivalent enthalpy drop method, cyclic functional method, composite structure method and matrix method. Heat balance method is a basic analysis methods of thermodynamic systems for coal fired power plants. According to the second law of thermodynamics, it is built base on the concept of heating unit It can qualitative analyse the economics of steam cycle by cycle irreversibility and quantitative analyse the economics of steam cycle by cycle functional. Matrix method is a general term, and not a specific method It combine heat balance equations of every regenerative heater and can completes the thermodynamic calculation by solving linear parametric equations[1]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
