Change search
ReferencesLink to record
Permanent link

Direct link
Influence of non-uniform flow distribution on overall heat transfer in convective bundle of circulating fluidized bed boiler
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Energy and Furnace Technology.
2005 (English)In: Heat and Mass Transfer, ISSN 0947-7411, E-ISSN 1432-1181, Vol. 41, no 11, 981-990 p.Article in journal (Refereed) Published
Abstract [en]

In the paper the results of comparative investigations on heat transfer performance of boiler convective bundle and its additional surface, i.e. membrane water wall are presented. For this purpose the non-uniform flow field was modelled in an isothermal test stand operated in self-modeling mode. Then the heat transfer characteristics of such arrangement were estimated by means of naphthalene heat/mass transfer analogy technique. The bundle samples in the shape of round bars (rods) were cast with naphthalene and placed in 27 locations in the bundle while water-wall-modeling samples were coated with naphthalene by painting. Both types of samples were exposed to cold air flow. The results were then compared to the mean heat transfer performance of the same bundle exposed to uniform flow field. The differences of approximately 10% were noticed. Moreover, the heat transfer coefficients for additional surface were even three times lower than those of the bundle. In view of results obtained in the work, the commonly made assumption of equality of heat transfer coefficients for both the bundle and its additional surface may lead to certain errors in heat transfer calculations and discrepancies between the calculated values of heating surfaces area and later operational needs of steam generator.

Place, publisher, year, edition, pages
2005. Vol. 41, no 11, 981-990 p.
Keyword [en]
heat transfer, boilers, convection
National Category
Mechanical Engineering
URN: urn:nbn:se:kth:diva-38312DOI: 10.1007/s00231-004-0608-3ISI: 000231501700004ScopusID: 2-s2.0-24144464502OAI: diva2:436672
QC 20110824Available from: 2011-08-24 Created: 2011-08-24 Last updated: 2011-08-24Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Kalisz, Sylwester
By organisation
Energy and Furnace Technology
In the same journal
Heat and Mass Transfer
Mechanical Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 24 hits
ReferencesLink to record
Permanent link

Direct link