TY - JOUR
T1 - Numerical Study on Heat Transfer to an Arc Absorber Designed for a Waste Heat Recovery System around a Cement Kiln
AU - Hosseini, Seyed Mojtaba Mir
AU - Rezaniakolaei, Alireza
AU - Rosendahl, Lasse Aistrup
PY - 2018/3
Y1 - 2018/3
N2 - A numerical study on combined free convection, forced convection, and radiation heat transfers from an industrial isothermal rotating cylinder (cement kiln) is carried out in this work. The investigation is done by the study of two-dimensional (2D) incompressible turbulent flow around the kiln under steady- and unsteady-state solutions. The results of this study show that the average Reynolds and Rayleigh numbers around the cylindrical kiln are 647,812.1 and 1.75986 × 1011, respectively. A heat absorber is specifically designed around the kiln, according to the available space around the kiln, in a sample cement factory. The study investigates the effect of an added absorber on the heat transfer features, for both constant heat flux and constant temperature, on the kiln. The temperature distribution along the absorber circumference is obtained for designing an efficient thermoelectric waste heat recovery system as a future study. It is observed that the contribution of the radiative heat transfer is significant in the total heat transferred from the kiln to the absorber.
AB - A numerical study on combined free convection, forced convection, and radiation heat transfers from an industrial isothermal rotating cylinder (cement kiln) is carried out in this work. The investigation is done by the study of two-dimensional (2D) incompressible turbulent flow around the kiln under steady- and unsteady-state solutions. The results of this study show that the average Reynolds and Rayleigh numbers around the cylindrical kiln are 647,812.1 and 1.75986 × 1011, respectively. A heat absorber is specifically designed around the kiln, according to the available space around the kiln, in a sample cement factory. The study investigates the effect of an added absorber on the heat transfer features, for both constant heat flux and constant temperature, on the kiln. The temperature distribution along the absorber circumference is obtained for designing an efficient thermoelectric waste heat recovery system as a future study. It is observed that the contribution of the radiative heat transfer is significant in the total heat transferred from the kiln to the absorber.
KW - Rotary kiln
KW - Absorber temperature distribution
KW - Waste heat recovery
KW - Computational fluid dynamics (CFD)
KW - Turbulent
KW - Combined heat transfer
KW - combined heat transfer
KW - computational fluid dynamics (CFD)
KW - turbulent
KW - rotary kiln
KW - waste heat recovery
KW - absorber temperature distribution
UR - http://www.scopus.com/inward/record.url?scp=85054060744&partnerID=8YFLogxK
U2 - 10.3390/en11030671
DO - 10.3390/en11030671
M3 - Journal article
SN - 1996-1073
VL - 11
SP - 1
EP - 16
JO - Energies
JF - Energies
IS - 3
M1 - en11030671
ER -