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2011 | Vol. 32, no. 1 | 77-88
Tytuł artykułu

Measurements of absorbed heat flux and water-side heat transfer coefficient in water wall tubes

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The tubular type instrument (flux tube) was developed to identify boundary conditions in water wall tubes of steam boilers. The meter is constructed from a short length of eccentric tube containing four thermocouples on the fire side below the inner and outer surface of the tube. The fifth thermocouple is located at the rear of the tube on the casing side of the water-wall tube. The boundary conditions on the outer and inner surfaces of the water flux-tube are determined based on temperature measurements at the interior locations. Four K-type sheathed thermocouples of 1 mm in diameter, are inserted into holes, which are parallel to the tube axis. The non-linear least squares problem is solved numerically using the Levenberg-Marquardt method. The heat transfer conditions in adjacent boiler tubes have no impact on the temperature distribution in the flux tubes.
Wydawca

Rocznik
Strony
77-88
Opis fizyczny
Bibliogr. 5 poz.,
Twórcy
autor
autor
autor
  • University of Science and Technology, Department of Energy Systems and Environment Protection, al. Mickiewicza 30, paw. B-3, 30-059 Cracow, Poland, taler@imir.agh.edu.pl
Bibliografia
  • [1] TALER J.: Messung der lokalen Heizflächenbelastung in Feuerräumen von Dampferzeugern. Brennstoff-Wärme-Kraft (BWK) 42(1990) 5, 269-277.
  • [2] TALER J.: Messung der Wärmebelastung der gasdicht verschweißten Verdampfer-Rohrwände in Dampferzeugern. VGB Kraftwerkstechnik 70(1990) 8, 644-650.
  • [3] TALER J., TALER D.: Tubular Type Heat Flux Meter for Monitoring Internal Scale Deposits in Large Steam Boilers. Heat Transfer Engineering 28(2007) 3, 230-239.
  • [4] ALBRECHT M.J., HAWK S.E.: Attachable heat flux measuring device. Patent US 6,485,174 B1, date of Patent: Nov. 26. 2002.
  • [5] PRESS W.H., TEUKOLSKY S.A., VETTERLING W.T., FLANNERY B.P.: Numerical Recipies in Fortran. The Art of Scientific Computing. Cambridge University Press, Cambridge 2007.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-article-BGPK-3177-2204
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