Abo Bibliothek: Guest
Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen
Heat Transfer Research
Impact-faktor: 0.404 5-jähriger Impact-Faktor: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561

Volumes:
Volumen 51, 2020 Volumen 50, 2019 Volumen 49, 2018 Volumen 48, 2017 Volumen 47, 2016 Volumen 46, 2015 Volumen 45, 2014 Volumen 44, 2013 Volumen 43, 2012 Volumen 42, 2011 Volumen 41, 2010 Volumen 40, 2009 Volumen 39, 2008 Volumen 38, 2007 Volumen 37, 2006 Volumen 36, 2005 Volumen 35, 2004 Volumen 34, 2003 Volumen 33, 2002 Volumen 32, 2001 Volumen 31, 2000 Volumen 30, 1999 Volumen 29, 1998 Volumen 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.v34.i3-4.110
17 pages

Translation of Heat Transfer Measurements from Laboratory CFBs to the Conditions of CFB-Boilers

C. Breitholtz
Department of Energy Conversion, Chalmers University of Technology, S-412 96 Goteborg, Sweden
B. Leckner
Department of Energy Conversion, Chalmers University of Technology, S-412 96 Goteborg, Sweden

ABSTRAKT

The aim of this work is to find a method for translation of heat transfer data from cold laboratory units to boiler conditions. From a compilation of existing data on heat transfer to walls in hot and cold circulating fluidized beds it is concluded that the results can be translated approximately by compensating for changes in the thermal conductivity of the gas and thermal radiation. A more general methodology is developed by deriving the criteria for thermal similarity. The only criterion that was added to those for fluid-dynamic similarity was the ratio of heat capacity of gas and particles. The thermal scaling is tested by comparing heat transfer measurements in a boiler with measurements in a scaled laboratory model. The results show that the Nusselt numbers were not the same in the boiler and the scaled model, which can be a result of the characteristic length-scale chosen, a too low heat capacity of the scaled particles or a failure to scale the local fluid-dynamics at the wall.


Articles with similar content:

EVAPORATION SYNERGIES BETWEEN LEAD AND ZINC CONTAINED IN A FLY ASH MODEL IN ITS TREATMENT BY PTA
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.5, 2001, issue 2
J. P. Lecompte, J. Jarrige, S. Bernard, Pierre Fauchais
THE DEVOLATILIZATION STEP DURING THE FLUIDIZED BED CONVERSION OF A BIOMASS
International Journal of Energy for a Clean Environment, Vol.4, 2003, issue 2
M. L. Mastellone, F. Perugini, M. Ponte, Umberto Arena
PARTICLE SCALE STUDY OF HEAT TRANSFER IN GAS FLUIDIZATION
International Heat Transfer Conference 13, Vol.0, 2006, issue
Paul Zulli, Z. Y. Zhou, A. B. Yu
ON A POSSIBILITY OF OPTIMIZATION OF STRUCTURAL PARAMETERS AND OPERATING CONDITIONS OF TRANSPIRATION COOLING SYSTEM EMPLOYED IN THE THERMO-STRESSED GAS TURBINE BLADES
Advances in Heat Transfer Engineering, Vol.1, 2003, issue
Eugene M. Seliverstov, Yury V. Polezhaev
THE EFFICIENCY OF THE RADIATION PROCESS IN THE CURING OF POWDER COATINGS WITH GASEOUS INFRARED HEATERS
ICHMT DIGITAL LIBRARY ONLINE, Vol.6, 1997, issue
M. Kogl, B. Leema, Joe Deans