ISSN Online: 2377-424X
ISBN Print: 0-85295-345-3
International Heat Transfer Conference 10
A MODEL FOR THERMAL-HYDRAULIC ANALYSIS OF HEAT RECOVERY STEAM GENERATORS (HRSG) FOR COMBINED-CYCLE PLANTS. AN APPLICATION TO COMPARISON OF DIFFERENT HRSG SIZINGS
Résumé
A model is presented to evaluate the thermal-hydraulic
performances of a combined-cycle plant HRSG. Horizontal
HRSGs with economizers, superheaters and natural circulation
evaporating sections, operating in a two-pressures cycle, are
considered. Several finned staggered or in-line tube banks
with spiral and circular fins arc considered in each section.
The heat transfer and gas pressure drop in each tube bank and
the steam flow rate in the evaporating sections are evaluated.
Several thermal and geometrical parameters are also estimated
to perform quick thermal design verifications and comparison
between different steam generators sizings. An example of
application is presented, by performing the comparison
between four HRSGs with different sizings of a 340 MWe combined cycle plant.