IDEAS home Printed from https://ideas.repec.org/a/eee/appene/v9y1981i4p257-266.html
   My bibliography  Save this article

A seasonally adjusted concentrator with modifications of absorber shape

Author

Listed:
  • Mullick, S. C.
  • Nanda, S. K.

Abstract

The heat losses from concentrating solar collectors can be reduced by thermally isolating the absorber with an optimal air gap between the absorber and the glass cover. However, in reflectors attempting to attain maximum optical concentration, some of the reflected rays will escape through this gap, resulting in increased losses. A concentrator was fabricated and tested with a plane tubular absorber, the results having been reported earlier. The present paper describes a design procedure for an absorber which avoids the [`]optical' losses through the air gap. The results for the modified absorber are compared with those for the plane tubular one. The intercept factor is improved from 0·8 to 0·92. The surface area of the modified absorber is about 9 % larger than that of the plane tubular one, but the shape is such that the overall heat loss factor is much lower. As a result, the total heat loss for the modified absorber at a temperature 100° C above ambient is only 0·2 % higher than that of the plane tubular one. The improved performance curves are shown. The absorber design is also acceptable from the point of view of strengths of the components involved.

Suggested Citation

  • Mullick, S. C. & Nanda, S. K., 1981. "A seasonally adjusted concentrator with modifications of absorber shape," Applied Energy, Elsevier, vol. 9(4), pages 257-266, December.
    • Handle: RePEc:eee:appene:v:9:y:1981:i:4:p:257-266
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/0306-2619(81)90002-7
    Download Restriction: Full text for ScienceDirect subscribers only
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:appene:v:9:y:1981:i:4:p:257-266. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/description#description .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.