Thermo-compressor : Design and CFD Analysis for Sugar Factory

Abstract

Thermo-compressor is design to recirculate steam or boost lower-pressure steam for reuse in a variety of process applications in pulp and paper, petrochemical, food processing, desalination, and specialty chemical production. In thermo-compressor, lower pressure steam mix with higher-pressure steam. The higher-pressure motive steam entrains the lower pressure steam and increases its pressure. The motive steam is introduced through the nozzle of the thermo-compressor. In this part of study, sugar factory data was collected from chalthan sugar factory for design calculation and CFD analysis. Boiler data has been used for calculation of primary nozzle design and turbine exhaust data used for suction chamber as waste steam or low-pressure steam. By using the gas-dynamic compressible flow theory and design methodology of thermo-compressor, major dimension was found for CFD analysis. Firstly, a numerical method has been implemented to evaluate Mach number of supersonic nozzle. The results have been validated using theoretical calculation data. Detail design of thermo-compressor is validated by CFD software ANSYS CFX and same is validated with performance of the same reported in various literature. The parametric study with nine different boundary condition of secondary pressure of thermo-compressor analysis is carried out. The effect of pressure of secondary flow on Exit pressure, Mach number and velocity also presented.