Naslov
Heat Transfer Coefficient Analysis between Fluidised Bed and Horizontaly Immersed Coil

Autori
Mudrinić, Saša ; Andrassy, Mladen ; Tadić Mirko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
4th European Thermal Sciences Conference / - Birmingham, 2004

Skup
4th European Thermal Sciences Conference

Mjesto i datum
Birmingham, Ujedinjeno Kraljevstvo, 29.03.2004. - 31.03.2004

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
heat transfer coefficient; immersed coil; fluidised bed

Sažetak
Values of heat transfer coefficients measured at the surface of a spirally shaped pipe coil, horizontally immersed into an air-corundum fluidised system, are presented in the paper. During the experiments, the fluidised bed was operating in the optimal range of gas velocities where maximum bed side heat transfer coefficients are obtained. The pipe coil is fed with hot water which is cooled by the fluidised bed, in which the coil was fully submerged. The tests were performed using three different corundum granulations: 0.185, 0.370 and 0.745 mm. For comparison, the measurement of the heat exchange for the same model and pure gas convention, when the pipe coil is cooled only with pure air was also performed. The measured maximum heat transfer coefficients are in accordance with the values calculated by means of the often-used Zabrodsky formula. Nondimensional correlation function for the investigated fluidization ranges was obtained by means of mathematical computation.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA