Selecting Nozzle Arrangement of a Chimney Tower to Reduce the Temperature and to Increase the Entrainment Mass Flow

The aim of this research work was to find the best arrangement of nozzles inside the chimney tower to reduce the temperature and to increase the entrainment mass flow. An existing design of the nozzle arrangement was used as the reference. Six configuration models as replacement alternatives were tested by using Computational Fluid Dynamics (CFD), an analysis tool to see the effect of different configurations to the temperature and entrainment mass flow. Some parameters were examined including temperature distribution inside the chimney in conjunction with an evaporative cooling system and the velocity flow. Prior to the analysis of other nozzle arrangements, five meshing types were tried and selected one to get the similar result with the existing design. The simulation results of new nozzle arrangement configuration with 8 nozzles at the top layer and 3 nozzles at the height of 3.5m from the base of the stack produces the optimum capacity in decreasing temperature and increasing the rate of water vapor.