IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v14y2021i20p6543-d654170.html
   My bibliography  Save this article

Verification and Improving the Heat Transfer Model in Radiators in the Wide Change Operating Parameters

Author

Listed:
  • Mieczysław Dzierzgowski

    (Faculty of Building Services, Hydro and Environmental Engineering, Warsaw University of Technology, Nowowiejska 20, 00-953 Warszawa, Poland)

Abstract

Laboratory measurements and analyses conducted in a wide range of changes of water temperature and mass flow rate for different types of radiators allowed to provides limitations and assessment of the current radiators heat transfer model according to E N 442. The inaccuracy to determinate the radiator heat output according to E N 442, in case of low water mass flow rates may achieve up to 22.3% A revised New Extended Heat Transfer Model in Radiators NEHTMiR md is general and suitable for different types of radiators both new radiators and radiators existing after a certain period of operation is presented. The N E H T M i R m d with very high accuracy describes the heat transfer processes not only in the nominal conditions—in which the radiators are designed, but what is particularly important also in operating conditions when the radiators water mass flow differ significantly from the nominal value and at the same time the supply temperature changes in the whole range radiators operating during the heating season. In order to prove that the presented new model N E H T M i R m d is general, the article presents numerous calculation examples for various types of radiators currently used. Achieved the high compatibility of the results of the s i m u l a t i o n calculations with the m e a s u r e m e n t results for different types of radiators: iron elements (not ribbed), plate radiators (medium degree ribbed), convectors (high degree ribbed) in a very wide range of changes in the water mass flow rates and the supply temperature indicates that a verified NEHTMiR md can also be used in designing and simulating calculations of the central heating installations, for the rational conversion of existing installations and district heating systems into low temperature energy efficient systems as well as to directly determine the actual energy efficiency , also to improve the indications of the heat cost allocators . In addition, it may form the basis for the future modification of the European Standards for radiator testing.

Suggested Citation

  • Mieczysław Dzierzgowski, 2021. "Verification and Improving the Heat Transfer Model in Radiators in the Wide Change Operating Parameters," Energies, MDPI, vol. 14(20), pages 1-30, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:20:p:6543-:d:654170
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/14/20/6543/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/14/20/6543/
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Ying Guan & Hongjiang Cui & Jiyou Fei, 2023. "Study on Optimization of Copper to Aluminum for Locomotive Finned Tube Radiator," Energies, MDPI, vol. 16(5), pages 1-13, February.
    2. Guelpa, E. & Capone, M. & Sciacovelli, A. & Vasset, N. & Baviere, R. & Verda, V., 2023. "Reduction of supply temperature in existing district heating: A review of strategies and implementations," Energy, Elsevier, vol. 262(PB).

    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:gam:jeners:v:14:y:2021:i:20:p:6543-:d:654170. 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: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    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.