"A CFD study was performed using STAR-CCM+ to validate the software for its competence in the prediction and scaling of condensation heat transfer in the presence of air acting as a non-condensable gas. Three vertical concentric tube heat exchanger geometries with different diameters were studied in the CFD analysis. It was seen that the steam bulk temperatures predicted by STAR-CCM+ closely matched the experimental data. However, the temperatures of outer wall of the steel condenser tubes showed a deviation of 2% to 11% from the experimental values. The error in adiabatic water wall temperatures were found to range from 18% to 6%. In general, the errors were larger closer to the steam inlet and reduced gradually towards the downstream regions. The error in heat transfer coefficients was much larger, with a maximum of 67.8% near the steam inlet. A scaling analysis was performed to study the ability of the software to predict the heat transfer coefficients for different diameter pipes. Although the software predicted that the heat transfer coefficient will reduce with increased diameter, the predictions failed to produce acceptable results. It was concluded that a further improvement is needed to the inbuilt software code for providing better predictions. Additional experiments are required to provide a basis for modifying the inbuilt correlations to provide an acceptable scaling analysis"--Abstract, page iii.
Schlegel, Joshua P.
Alajo, Ayodeji Babatunde
Nuclear Engineering and Radiation Science
M.S. in Nuclear Engineering
Missouri University of Science and Technology
x, 72 pages
© 2017 Varun Kalra
Thesis - Open Access
Electronic OCLC #
Kalra, Varun, "CFD validation and scaling of condensation heat transfer" (2017). Masters Theses. 7649.