Gas flow distribution in heat recovery steam generators

摘要

A heat recovery steam generator has a housing defining a horizontally oriented exhaust gas stream path from a gas turbine. The housing has a diffuser portion and a full cross-section portion containing heat recovery assemblies. The diffuser portion expands the exhaust gas stream from the duct at the gas turbine exhaust to the full cross-section portion. Positioned in the diffuser is a diffuser heat recovery assembly for heat recovery and control of the flow distribution of the exhaust gas flow stream.