Preliminary communication
https://doi.org/10.31217/p.34.1.9
Comparison of conventional and heat balance based energy analyses of steam turbine
Vedran Medica-Viola
; Faculty of Engineering, University of Rijeka, Rijeka, Croatia
Sandi Baressi Šegota
orcid.org/0000-0002-3015-1024
; Faculty of Engineering, University of Rijeka, Rijeka, Croatia
Vedran Mrzljak
orcid.org/0000-0003-0323-2600
; Faculty of Engineering, University of Rijeka, Rijeka, Croatia
Daniel Štifanić
orcid.org/0000-0001-9396-2441
; Faculty of Engineering, University of Rijeka, Rijeka, Croatia
Abstract
This paper presents a comparison of conventional and heat balance based energy analyses of steam turbine. Both analyses are compared by using measured operating parameters from low power steam turbine exploitation. The major disadvantage of conventional steam turbine energy analysis is that extracted energy flow streams are not equal in real (polytropic) and ideal (isentropic) expansion processes, while the heat balance based energy analysis successfully resolved mentioned problem. Heat balance based energy analysis require an increase of steam mass flow rates extracted from the turbine in ideal (isentropic) expansion process to ensure always the same energy flow streams to all steam consumers. Increase in steam mass flow rate extracted through each turbine extraction (heat balance based energy analysis) result with a decrease in energy power losses and with an increase in energy efficiency of whole turbine and all of its cylinders (when compared to conventional analysis). All of the obtained conclusions in this research are valid not only for the analyzed low power steam turbine, but also for any other steam turbine with steam extractions.
Keywords
Steam turbine; Conventional energy analysis; Heat balance based energy analysis; Turbine efficiency and losses
Hrčak ID:
238890
URI
Publication date:
30.6.2020.
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