Abstract
In order to calculation the enthalpy of wet steam in the secondary reheat turbine thermal system the thermodynamic system of the secondary reheat steam turbine based on the isentropic ideal expansion process line was corrected, This method simplifies the correction calculation step and increases the accuracy of the correction result. Analysis of the rationality of the improved method shows that: Compared with the existing secondary reheat steam turbine thermal system correction method, the maximum error of the improved thermal system correction method is 0.14%. Therefore, this method can better meet the test accuracy requirements.
Highlights
When carrying out steam turbine thermal experiments, the operating parameters of the unit often have a large deviation from the design value of the unit and have a greater impact on the economics of the unit
In order to further illustrate the consistency of the results obtained by the two, the thermal system of a secondary reheat steam turbine is taken as an example to analyze the similarities and differences between the two correction methods
According to the actual thermal test data, the correction results based on the actual expansion process line and the isentropic ideal expansion process line are shown in Comparing the correction results obtained by the two thermal system correction methods in Fig. 3, it can be seen that the absolute value of the absolute error of the two correction results is 0.00197 MPa, and the error analysis can be seen
Summary
When carrying out steam turbine thermal experiments, the operating parameters of the unit often have a large deviation from the design value of the unit and have a greater impact on the economics of the unit. In the literature [8], the steam turbine thermal correction method based on the isentropic ideal expansion process line is given, but the application of the secondary reheat unit is not given. In practical applications, the steam enthalpy and the low-pressure cylinder exhaust steam of the steam turbine in the wet steam zone required for the correction calculation can only be estimated because the humidity in the steam cannot be determined, so the actual expansion process line of the steam turbine itself There is a large error, which leads to inaccurate results of the various corrections of the thermal system and subsequent thermal economic evaluation and diagnosis.
Sign-in/Register to view highlights & summary 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.
