Abstract
There are many finned-tube banks in a Heat Recovery Steam Generator (HRSG). The development of finned-tube with the excellent heat transfer characteristic is demanded for decreasing the size of the HRSG. In this study, the influences of the flow rate and fin height on the local heat transfer coefficient were evaluated using the CFD analysis. The serrated finned tubes with the bare tube outside diameters of 38.1mm were used. As a result, the local heat transfer coefficients at the upstream side of each fin segment become larger with increasing the flow rate . Moreover, the distribution of the local heat transfer coefficients at the upstream side of each fin segment become more flat with increasing the fin height.
