Numerical calculation of the effect of deposit formation on heat-exchanger efficiency

 
see the original item page
in the repository's web site and access all digital files if the item*
share




1997 (EN)
Numerical calculation of the effect of deposit formation on heat-exchanger efficiency (EN)

Bergeles, G (EN)
Bouris, D (EN)

N/A (EN)

A numerically calculated deposit was used to identify the shape of a fouled tube and an orthogonal curvilinear grid was constructed in and around the deposit. The flow and temperature field was calculated and an implicit boundary condition, accounting for the effects of turbulence, was introduced at the solid-fluid interface for the simultaneous calculation of the temperature held in the fluid and the solid. Validation is presented against experimental and numerical calculations. Finally, a reduction of 8-17% in the heat transfer rate was found to occur for a deposit corresponding to 8 h of operation in a staggered tube bundle heat-exchanger of a lignite utility boiler. Thermal resistance of the deposit was also calculated. (C) 1997 Elsevier Science Ltd. (EN)

journalArticle

Heat resistance (EN)
Computational methods (EN)
Turbulence (EN)
efficiency (EN)
Heat Exchanger (EN)
Thermal Resistance (EN)
Solid fluid interface (EN)
Boundary conditions (EN)
Heat exchangers (EN)
Temperature Field (EN)
Orthogonal curvilinear grid (EN)
deposits (EN)
Tubes (components) (EN)
temperature distributions (EN)
Numerical Calculation (EN)
heat exchangers (EN)
Heat Transfer (EN)
Boiler deposits (EN)
Boundary Condition (EN)
Heat transfer (EN)
pipes (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

International Journal of Heat and Mass Transfer (EN)

1997


PERGAMON-ELSEVIER SCIENCE LTD (EN)



*Institutions are responsible for keeping their URLs functional (digital file, item page in repository site)