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

• Autorzy: Taler D. , Taler J. , Kowal A.
• 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.

Słowa kluczowe

EN

heat flux meter; inverse heat conduction problem; slagging; steam boiler

PL

kotło parowe; odwrotne przewodzenie ciepła; strumień ciepła; żużel

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2011
• Tom: Vol. 32, no. 1
• Strony: 77--88
• Opis fizyczny: Bibliogr. 5 poz.,

Twórcy

autor

Taler D.

autor

Taler J.

autor

Kowal A.

• University of Science and Technology, Department of Energy Systems and Environment Protection, al. Mickiewicza 30, paw. B-3, 30-059 Cracow, Poland,

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.