Computational Model for High-Pressurized Heat Recovery Steam Generator Heat Transfer Study

This article shows the main stages of computational model development for CFD (Computational Fluid Dynamics) research dedicated to High-Pressurized Heat Recovery Steam Generator (HPHRSG). This project could solve the problem of quick decommissioning and replacement of energy equipment. It has different structure comparing existing units made especially for decreasing the costs of reconstruction.The model was created in ANSYS CFX software. Several approaches have chosen to validate results of the model. The model allows quick geometrical and physical properties change for studying different heat transfer effects. Great attention is paid to the correct choice of mathematical models for studying the flow motion and heat transfer processes. The most applicable way of solving engineering tasks is the RANS (Reynolds Averaged Navier-Stokes equations) method. Several three-dimensional geometry models and computational meshes are shown. Key material features and model parameters are presented. Initial mesh has shown poor results although the mesh quality was high because of inflation layers lack. It is essential in questions of convective heat transfer study to make inflation layers.The results of research have shown that current model’s calculation time reduced by 2 times comparing initial version and accuracy of the results amounts less than 2% comparing the existing approaches.