Studies on Heat Exchangers using Miscible System

摘要

An experimental investigation on comparative heat transfer study on a solvent and solution were made using Cross flow and Shell and Tube Heat Exchangers. Steam is the hot fluid, whereas Wafer and Acetic acid-Water miscible solution serves as cold fluid, A series of runs were made between steam and water, steam and Acetic acid solution. In addition to, the volume fraction of Acetic acid was varied and the experiment was held. The flow rate of the cold fluid is maintained from 30 lph to 300 lph for Cross flow Heat Exchanger, for Shell and Tube Heat Exchanger maintained from 120 lph to 720 lph, and the volume fraction of Acetic acid is varied from 10%-50%. Experimental results such as exchanger effectiveness, overall heat transfer coefficients were compared for both the flow systems of Cross flow and Shell and Tube Heat Exchangers. A steady state model for the outlet temperature of both the cold and hot fluid and overall heat transfer coefficient of a plate-fin cross flow heat exchanger for Acetic acid solution- steam system at various compositions of Acetic acid is developed and simulated using MATLAB, which was verified with the experiments conducted. A mathematical model was developed for the outlet temperatures of both the Shell and Tube side fluids, and was simulated using MATLAB program. The model was compared with the experimental findings and found to be valid.