Advanced

Thermo-economic study on the implementation of steam turbine concepts for flexible operation on a direct steam generation solar tower power plant

Topel, Monika; Ellakany, Farid; Guédez, Rafael; Genrup, Magnus LU and Laumert, Björn (2016) 21st International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2015 In SolarPACES 2015: International Conference on Concentrating Solar Power and Chemical Energy Systems 1734.
Abstract

Among concentrating solar power technologies, direct steam generation solar tower power plants represent a promising option. These systems eliminate the usage of heat transfer fluids allowing for the power block to be run at greater operating temperatures and therefore further increasing the thermal efficiency of the power cycle. On the other hand, the current state of the art of these systems does not comprise thermal energy storage as there are no currently available and techno-economically feasible storage integration options. This situation makes direct steam generation configurations even more susceptible to the already existing variability of operating conditions due to the fluctuation of the solar supply. In the interest of... (More)

Among concentrating solar power technologies, direct steam generation solar tower power plants represent a promising option. These systems eliminate the usage of heat transfer fluids allowing for the power block to be run at greater operating temperatures and therefore further increasing the thermal efficiency of the power cycle. On the other hand, the current state of the art of these systems does not comprise thermal energy storage as there are no currently available and techno-economically feasible storage integration options. This situation makes direct steam generation configurations even more susceptible to the already existing variability of operating conditions due to the fluctuation of the solar supply. In the interest of improving the annual performance and competitiveness of direct steam generation solar tower systems, the present study examines the influence of implementing two flexibility enhancing concepts which control the steam flow to the turbine as a function of the incoming solar irradiation. The proposed concepts were implemented in a reference plant model previously developed by the authors. Then, a multi-objective optimization was carried out in order to understand which configurations of the steam turbine concepts yield reductions of the levelized cost of electricity at a lower investment costs when compared to the reference model. Results show that the implementation of the proposed strategies can enhance the thermo-economic performance of direct steam generation systems by yielding a reduction of up to 9.2% on the levelized cost of electricity, mainly due to allowing 20% increase in the capacity factor, while increasing the investment costs by 7.8%.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
SolarPACES 2015: International Conference on Concentrating Solar Power and Chemical Energy Systems
volume
1734
publisher
American Institute of Physics Inc.
conference name
21st International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2015
external identifiers
  • scopus:84984538341
ISBN
9780735413863
DOI
10.1063/1.4949147
language
English
LU publication?
yes
id
78bbf391-2619-4950-a121-ba08c3a2d662
date added to LUP
2017-01-27 10:33:25
date last changed
2017-01-27 10:43:41
@inproceedings{78bbf391-2619-4950-a121-ba08c3a2d662,
  abstract     = {<p>Among concentrating solar power technologies, direct steam generation solar tower power plants represent a promising option. These systems eliminate the usage of heat transfer fluids allowing for the power block to be run at greater operating temperatures and therefore further increasing the thermal efficiency of the power cycle. On the other hand, the current state of the art of these systems does not comprise thermal energy storage as there are no currently available and techno-economically feasible storage integration options. This situation makes direct steam generation configurations even more susceptible to the already existing variability of operating conditions due to the fluctuation of the solar supply. In the interest of improving the annual performance and competitiveness of direct steam generation solar tower systems, the present study examines the influence of implementing two flexibility enhancing concepts which control the steam flow to the turbine as a function of the incoming solar irradiation. The proposed concepts were implemented in a reference plant model previously developed by the authors. Then, a multi-objective optimization was carried out in order to understand which configurations of the steam turbine concepts yield reductions of the levelized cost of electricity at a lower investment costs when compared to the reference model. Results show that the implementation of the proposed strategies can enhance the thermo-economic performance of direct steam generation systems by yielding a reduction of up to 9.2% on the levelized cost of electricity, mainly due to allowing 20% increase in the capacity factor, while increasing the investment costs by 7.8%.</p>},
  author       = {Topel, Monika and Ellakany, Farid and Guédez, Rafael and Genrup, Magnus and Laumert, Björn},
  booktitle    = {SolarPACES 2015: International Conference on Concentrating Solar Power and Chemical Energy Systems},
  isbn         = {9780735413863},
  language     = {eng},
  month        = {05},
  publisher    = {American Institute of Physics Inc.},
  title        = {Thermo-economic study on the implementation of steam turbine concepts for flexible operation on a direct steam generation solar tower power plant},
  url          = {http://dx.doi.org/10.1063/1.4949147},
  volume       = {1734},
  year         = {2016},
}