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The performance simulation of all-glass vacuum tubes with coaxial fluid conduit

  • Jeong Tai Kim
  • , Hyun Tae Ahn
  • , Hyunjoo Han
  • , Hyung Taek Kim
  • , Wongee Chun

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

Abstract

A numerical investigation has been carried out for a solar system, which consists of all-glass (double skin) solar vacuum tubes. Water is heated as it flows through the coaxial fluid conduit inserted in each tube. The space between the exterior of the fluid conduit and the glass tube is filled with antifreeze solution. This is to facilitate heat transfer from the solar heated absorber surface to water and to prevent the functional problems due to freezing in frigid weather conditions. Results show good agreement when compared with other experimental data demonstrating the reliability of the present model. The one-dimensional numerical model could be used efficiently in designing all-glass solar collector tubes with different geometrical parameters other than those considered in the present analysis.

Original languageEnglish
Pages (from-to)587-597
Number of pages11
JournalInternational Communications in Heat and Mass Transfer
Volume34
Issue number5
DOIs
Publication statusPublished - May 2007

Bibliographical note

Funding Information:
This work was supported by the grant (No. R01-2006-000-10712-0) from the Basic Research Program of the Korea Science & Engineering Foundation and some authors also were supported by the Second Stage Brain Korea 21 Program of the Ministry of Education and Human Resources Development.

Keywords

  • Analytical approach
  • Coaxial conduit
  • One-dimensional
  • Solar tubular collectors

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