Effect of non-uniform concentrated solar flux on direct steam generation in vertical pipes of solar tower receivers

V. M. Maytorena, J. F. Hinojosa*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The purpose of this work is to analyze the effect of non-uniform concentrated solar radiation on direct steam generation in a vertical tube of solar tower receiver. The modified RPI model was used for the conditions of critical heat flux coupled to a Eulerian two fluid model. The mathematical model was solved with CFD software. The results were validated with experimental data reported in the literature and a parametric study was carried out to determinate the effect of non-uniform concentrated solar radiation, on the steam quality, the volumetric fraction, enthalpies and temperatures of liquid and steam. Non-uniform concentrated solar fluxes favor generation of steam but produce conditions that may influence the structural durability of DSG receivers, like high axial temperature gradients and zones with temperatures above the melting temperature of stainless steel.

Original languageEnglish
Pages (from-to)665-676
Number of pages12
JournalSolar Energy
Volume183
DOIs
StatePublished - 1 May 2019

Bibliographical note

Publisher Copyright:
© 2019 International Solar Energy Society

Keywords

  • Computational modelling
  • Concentrated solar energy
  • Direct steam generation

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