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Simulation of Solarized Combined Cycles: Comparison Between Hybrid GT and ISCC Plants

[+] Author Affiliations
G. Barigozzi, G. Franchini, A. Perdichizzi, S. Ravelli

Università degli Studi di Bergamo, Dalmine, BG, Italy

Paper No. GT2013-95483, pp. V004T05A008; 11 pages
doi:10.1115/GT2013-95483
From:
  • ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
  • Volume 4: Ceramics; Concentrating Solar Power Plants; Controls, Diagnostics and Instrumentation; Education; Electric Power; Fans and Blowers
  • San Antonio, Texas, USA, June 3–7, 2013
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5518-8
  • Copyright © 2013 by ASME

abstract

The present paper investigates two different Solarized Combined Cycle layout configurations. In the first scheme, a solarized gas turbine is coupled to a solar tower. Pressurized air at compressor exit is sent to the solar tower receiver before entering the GT combustor. Here temperature is increased up to the nominal turbine inlet value through natural gas combustion. In the second CC layout, solar energy is collected by line focusing parabolic trough collectors and used to produce superheated steam in addition to the one generated in the heat recovery boiler. The goal of the paper is to compare the thermodynamic performance of these CSP technologies when working under realistic operating conditions. Commercial software and in-house computer codes were combined together to predict CSP plant performance both on design and off-design conditions. Plant simulations have shown the beneficial effect of introducing solar energy at high temperature in the Joule-Brayton cycle and the drawback in terms of GT performance penalization due to solarization. Results of yearly simulations on a one hour basis for the two considered plant configurations are presented and discussed. Main thermodynamic parameters such temperatures, pressure levels, air and steam flow rates are reported for two representative days.

Copyright © 2013 by ASME

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