Research Papers: Gas Turbines: Cycle Innovations

Enhancing the Economic Competitiveness of Concentrating Solar Power Plants Through an Innovative Integrated Solar-Combined Cycle With Thermal Energy Storage

[+] Author and Article Information
Rafael Guédez

Department of Energy Technology,
Royal Institute of Technology,
Stockholm SE-100 44, Sweden
e-mail: rafael.guedez@energy.kth.se

James Spelling

Department of Energy Technology,
Royal Institute of Technology,
Stockholm SE-100 44, Sweden
e-mail: james.spelling@energy.kth.se

Björn Laumert

Department of Energy Technology,
Royal Institute of Technology,
Stockholm SE-100 44, Sweden
e-mail: bjorn.laumert@energy.kth.se

1Corresponding author.

Contributed by the Cycle Innovations Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received July 21, 2014; final manuscript received August 5, 2014; published online November 11, 2014. Editor: David Wisler.

J. Eng. Gas Turbines Power 137(4), 041701 (Apr 01, 2015) (9 pages) Paper No: GTP-14-1423; doi: 10.1115/1.4028655 History: Received July 21, 2014; Revised August 05, 2014; Online November 11, 2014

The present work deals with the thermo-economic analysis of an innovative combined power cycle consisting of a molten-salt solar tower power plant with storage supported by additional heat provided from the exhaust of a topping gas-turbine unit. A detailed dynamic model has been elaborated using an in house simulation tool that simultaneously encompasses meteorological, demand and price data. A wide range of possible designs are evaluated in order to show the trade-offs between the objectives of achieving sustainable and economically competitive designs. Results show that optimal designs of the novel concept are a promising cost-effective hybrid option that can successfully fulfill both the roles of a gas peaker plant and a baseload solar power plant in a more effective manner. Moreover, designs are also compared against conventional combined cycle gas turbine (CCGT) power plants and it is shown that, under specific peaking operating strategies (P-OSs), the innovative concept cannot only perform better from an environmental standpoint but also economically.

Copyright © 2015 by ASME
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Fig. 1

Schematic flowsheet of the SSTCC

Grahic Jump Location
Fig. 2

Flow of information and calculation in DYESOPT

Grahic Jump Location
Fig. 3

Meteorological, demand, and price data for Seville (37°N 2°E) from June 18 to June 24 of 2012

Grahic Jump Location
Fig. 4

LEC results for all possible plant designs

Grahic Jump Location
Fig. 5

Trade-off between annual specific CO2 emissions and LEC for optimal plant designs

Grahic Jump Location
Fig. 6

Economic performance sensitivity to natural gas cost

Grahic Jump Location
Fig. 7

LEC sensitivity to air-to-salt heat exchanger cost




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In