Heat loss characteristics of trapezoidal cavity receiver for solar linear concentrating system

Sendhil Natarajan, K S Reddy, Tapas Mallick

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

In this paper, a numerical study of combined natural convection and surface radiation heat transfer in a solar trapezoidal cavity absorber for Compact Linear Fresnel Reflector (CLFR) is presented. The CFD pack- age, FLUENT 6.3 is used to develop the 2-D, non-Boussinesq, steady state, laminar, combined natural con- vection and surface radiation heat transfer model for a trapezoidal cavity absorber. The validation of the present non-Boussinesq numerical procedure is compared with other closed cavity model. Based on the validated non-Boussinesq model, the combined heat loss coefficients are predicted for various parame- ters such as Grashof number, absorber angles, surface emissivity, aspect ratio, temperature ratio and radi- ation–conduction number. The numerical simulation results are presented in terms of Nusselt number correlation to show the effect of these parameters on combined natural convection and surface radiation heat loss.
Original languageEnglish
Pages (from-to)523-531
Number of pages9
JournalApplied Energy
Volume93
DOIs
Publication statusPublished - May 2012

Keywords

  • Non-Boussinesq
  • Combined natural convection and surface radiation
  • Nusselt number correlation
  • Trapezoidal cavity absorber
  • CLFR

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