Thermal Response Analysis for Economiser by Varying Tube Material and Clamping Arrangement using FEA Software

An economizer is a used with boiler to retain the heat generated from boiler combustion and hence to improve the efficiency of the boiler. The flue gases which exits from boiler chamber are found very hot and are used to preheat boiler feed water. The economizer in present research paper is modelled in Creo-Parametric software and is imported to ANSYS software for the purpose of thermal analysis. Stress concentration in economizer tube is reported several times from the user industries. The problem is tried to solve by suggesting the clamping type improvement i.e use of half curved ‘C’ clamped economizer tubes to reduce stress concentration at clamping surface of tube. Also alternate material of economizer tube is tested i.e. tungsten alloy instead of steel tubes. The result of present paper compared von-mises stresses, total deformation of economizer tube, strain energy and elastic strain for all cases under consideration i.e. full clamp tube and ‘C’ clamp tube both with material steel and tungsten alloy respectively.