Performance and Thermal Analysis of One Shell Two Tube PassHeat Exchanger with Ethylene Glycol and SIC Nano Fluid

摘要

The one shell two tube pass heat exchanger is equipment in which the heat transfer takes place between two fluids maintained at different temperatures. The two fluids are non-mixing type with the use of shell and tube in which the cold fluid flows in tubes and the hot fluid flows in the shell. The cold fluid in the tubes is allowed to flow twice through the tubes using u-tubes, hence called two tube pass. The thermal performance and analysis of the heat transfer of 1-shell, 2-tube pass heat exchanger is examined using various working fluids. The working fluids used are water, various proportions of Ethylene glycol (pure, 50%, 25%) and silicon carbide (1%, 2%) volume fractions with water as base fluid. The effect of important parameters such as mean temperature, effectiveness and overall heat transfer variations of the working fluids of ethylene glycol and the Nano fluid Sic are compared with water to investigate the heat transfer characteristics. Again a thin strip of rectangular fins are incorporated with in the tubes in order increase the heat transfer. The thermal analysis has been done using the same fluids with application of fins and these parameters are compared with the results of obtained without fins. Using three dimensional steady, turbulent developing flows and conjugate heat transfer in the cross flow shell and tube heat exchange are analysed by using solid works. Comparing the analysis of various proportions of ethylene glycol and silicon carbide Nano fluids with water there has been an increase in overall heat transfer coefficient.