Skip to main content
SpringerLink
Log in

An analytical study on the thermal characteristics of flat-plate and evacuated solar collectors

  • Thermal and Power Engineering
  • Published:
Journal of Mechanical Science and Technology Aims and scope Submit manuscript

Abstract

In this study, we highlighted differences in the standards used in performance tests of solar collectors. We analyzed testing results for different types of solar collectors to determine the effects of the collector area and mass flow rate, which were not necessarily consistent across all tests. Our analysis showed that the factor,F′ (τα), including collector efficiency factor (F′), could be correlated with the flow rate or area regardless of the collector type. Moreover, the collector loss coefficient (F′U L ) per flow rate or area for an evacuated collector was less that of a flat-plate collector; this was also correlated with the flow rate or area, regardless of the type of evacuated collector. As a result of this analysis, we propose a modified heat loss coefficient that includes the effects of all parameters that can be considered in a performance test and show that this coefficient could better describe the thermal characteristics of various types of solar collectors.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. E. Marschall and G. Adams, The efficiency of solar flat-plate collectors,Solar energy. 20 (1978) 413–414.

    Article  Google Scholar 

  2. J. M. Gordon, On non-linear effects in flat-plate collector efficiency curves,Solar energy. 26 (1981) 265–266.

    Article  Google Scholar 

  3. E. Hahne, Parameter Effects on Design and Performance of Flat Plate Solar Collectors,Solar Energy. 34 (1985) 497–504.

    Article  Google Scholar 

  4. DIN Standard No. 4795.

  5. EN Standard No. 12975.

  6. KS Standard No. 9806-3.

  7. P. I. Cooper and R. V. Dunkle, A non-linear flatplate collector model,Solar energy. 26 (1981) 133–140.

    Article  Google Scholar 

  8. J. A. Duffie and W. A. Beckman, Solar Engineering of Thermal Processes, 1st edn, Wiley Interscience, New York, (1980) 197–249.

    Google Scholar 

  9. ISO Standard #9806-1.

Download references

Author information

Authors and Affiliations

  1. New and Renewable Energy Research Department, KIER (Korea Institute of Energy Research), 71-2, Jang-dong, Yuseong-gu, 305-343, Daejeon, Korea

    Jeongbae Kim, Hee Youl Kwak & Dong Won Lee

Authors
  1. Jeongbae Kim
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Hee Youl Kwak
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Dong Won Lee
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Jeongbae Kim.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Kim, J., Kwak, H.Y. & Lee, D.W. An analytical study on the thermal characteristics of flat-plate and evacuated solar collectors. J Mech Sci Technol 21, 2159–2167 (2007). https://doi.org/10.1007/BF03177476

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF03177476

Keywords

Search

Navigation