Thermal analysis of CFB boiler tube with inclined perforation of different configuration and fluid temperature to enhance heat transfer

Thermal analysis of CFB boiler tube with inclined perforation of different configuration and fluid temperature to enhance heat transfer

Vikas Kumar1, Dr. Shyam Kumar Birla2
M.tech Scholar1,HOD2
Department of Mechanical Engineering1, 2
Oriental college of Technology, Bhopal, India.

Abstract
Three types of configurations of CFB boiler tube i.e. tube with inclined square, inclined circular, inclined elliptical inclined perforations have been used. An optimized model of CFB boiler tube has been developed with different tube profiles. The simulation of the optimized model gives higher value of temperature distribution with respect to heat transfer coefficient and thermal conductivity with constant temperature of 673K, 773K and 873K. It is also observed from present analysis that CFB boiler tube with inclined elliptical perforation at 673K gives higher thermal distribution also as increase in constant temperature of 873K maximum heat transfer coefficient is observed, Hence CFB boiler tube with circumferentially 12 degree inclined elliptical shaped perforation enhances maximum thermal performance. The configuration of 12 degree inclined elliptical perforated profile gives maximum convergence on all parameters amongst all the configurations used.

Key Words – Circulating Fluidized Bed, Temperature Distribution, Inclined perforations, Heat Transfer Coefficient, Thermal Conductivity, Inclined hole.