Numerical modelling of fin side heat transfer and pressure loss for compact heat recovery steam generators

An optimization tool for offshore bottoming cycle and heat recovery steam generator (HRSG) design has previously been developed. The is based on empirical correlations to obtain hydraulic thermal quantities the HRSG. However, as these are experiments with typical onshore designs, they may not be valid compact designs encountered in HRSGs.In order extend validity range of tool, this work presents a numerical model able predict transfer pressure loss finned tube bundles by means Computational Fluid Dynamics (CFD), utilizing periodic domain reduce computational costs. Both steady-state transient models were applied, using Spalart-Allmaras turbulence model, their performance compared. To validate results compared available experimental data, then model’s was selected correlation.Three different fin-tube geometries investigated (two serrated solid) varying layout angles. A parameterized grid generation developed used generate grids geometries. CFD found within 20 % most cases more accurate than correlation. simulations did, however, converge geometry largest angle. framework should therefore applied only layouts. simulations, though being computationally intensive, also large