Influence of the Concentration Ratio on the Thermal and Economic Performance of Parabolic Trough Collectors

Julian Osorio, Alejandro Rivera-Alvarez

Research output: Contribution to journalArticlepeer-review

16 Scopus Citations

Abstract

The thermal and economic performance of parabolic trough collectors (PTCs) and PTCs with double glass envelope (DGE-PTCs) are analyzed in this work. A model including thermal and optical effects is developed to evaluate the efficiency of vacuum and air-filled DGE-PTCs, while an economic model based on two commercial PTCs (SkyTrough and Ultimate Trough collectors) was developed to assess the economic performance. The efficiency and thermal output per unit cost of the proposed DGE-PTCs are analyzed as a function of the concentration ratio and are respectively compared with the thermal and economic performance of traditional and commercial PTCs. The optimum concentration ratio for maximum thermal performance varies from 11.0 to 23.3 for operation temperatures (THTF) between 100 °C and 400 °C, while the optimum concentration ratio for maximum economic performance ranges between 28.9 and 33.2 for the SkyTrough and between 40.0 and 43.8 for the Ultimate Trough collector designs. The DGE-PTCs present higher thermal and economic performance at high operating temperatures, which presents a valuable opportunity for implementation in new PTC designs pursuing higher operating temperatures to achieve superior thermal cycle efficiencies.

Original languageAmerican English
Pages (from-to)786-802
Number of pages17
JournalRenewable Energy
Volume181
DOIs
StatePublished - Jan 2022

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Ltd

NREL Publication Number

  • NREL/JA-5700-80239

Keywords

  • Concentration ratio
  • Double glass envelope
  • Economic performance
  • Efficiency
  • Parabolic trough collectors

Fingerprint

Dive into the research topics of 'Influence of the Concentration Ratio on the Thermal and Economic Performance of Parabolic Trough Collectors'. Together they form a unique fingerprint.

Cite this