Operational Improvements for Start-Up Time Reduction in Solar Steam Turbines
Författare
Summary, in English
Solar steam turbines are subject to high thermal stresses as a result of temperature gradients during transient operation, which occurs more frequently due to the variability of the solar resource. In order to increase the flexibility of the turbines while preserving lifing requirements, several operational modifications for maintaining turbine temperatures during offline periods are proposed and investigated. The modifications were implemented in a dynamic thermal turbine model and the potential improvements were quantified. The modifications studied included: increasing the gland steam pressure injected to the end-seals, increasing the back pressure and increasing the barring speed. These last two take advantage of the ventilation and friction work. The effects of the modifications were studied both individually as well as in different combinations. The temperatures obtained when applying the combined modifications were compared to regular turbine cool-down temperatures and showed significant improvements on the start-up times of the turbine.
Avdelning/ar
Publiceringsår
2014
Språk
Engelska
Sidor
05-20
Publikation/Tidskrift/Serie
Proceedings of the ASME Turbo Expo: Turbine Technical Conference And Exposition, 2014, Vol 5C
Dokumenttyp
Konferensbidrag
Förlag
Amer. Soc. Mechanical Engineers
Ämne
- Energy Engineering
Conference name
ASME Turbo Expo: Turbine Technical Conference and Exposition
Conference date
2014-06-16 - 2014-06-20
Status
Published