Operational Improvements for Startup Time Reduction in Solar Steam Turbines
(2015) In Journal of Engineering for Gas Turbines and Power 137(4).- Abstract
- 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 lifting 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... (More)
- 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 lifting 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 (CD) temperatures and showed significant improvements on the startup times of the turbine. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/5300393
- author
- Topel, Monika ; Genrup, Magnus LU ; Jocker, Markus ; Spelling, James and Laumert, Bjorn
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Engineering for Gas Turbines and Power
- volume
- 137
- issue
- 4
- article number
- 042604
- publisher
- American Society Of Mechanical Engineers (ASME)
- external identifiers
-
- wos:000350145500024
- scopus:84940473273
- ISSN
- 1528-8919
- DOI
- 10.1115/1.4028661
- language
- English
- LU publication?
- yes
- id
- 963c5db5-f14d-4835-9bbc-b657c73d3a21 (old id 5300393)
- date added to LUP
- 2016-04-01 09:59:14
- date last changed
- 2022-04-27 17:29:08
@article{963c5db5-f14d-4835-9bbc-b657c73d3a21,
abstract = {{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 lifting 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 (CD) temperatures and showed significant improvements on the startup times of the turbine.}},
author = {{Topel, Monika and Genrup, Magnus and Jocker, Markus and Spelling, James and Laumert, Bjorn}},
issn = {{1528-8919}},
language = {{eng}},
number = {{4}},
publisher = {{American Society Of Mechanical Engineers (ASME)}},
series = {{Journal of Engineering for Gas Turbines and Power}},
title = {{Operational Improvements for Startup Time Reduction in Solar Steam Turbines}},
url = {{http://dx.doi.org/10.1115/1.4028661}},
doi = {{10.1115/1.4028661}},
volume = {{137}},
year = {{2015}},
}