Sealing Off HRSG Heat Loss

摘要

Heat recovery steam generators (HRSGs) are an excellent way to capture more value from the fuel budget. But achieving the most from an HRSG requires that they be operated as efficiently as possible. One potential weak point, for ex-rnample, is where pipes enter and leave the boiler casing, resulting in hot spots, thermal loss and even unplanned shutdowns.rn"We have experienced several cracks caused by overheating in our bottom panels and excessive thermal growth," said Neal Holden, combustion turbine engineering manager for Progress Energy in Raleigh, N.C. "That is a constant battle: limiting energy loss and keeping the casing temperature down to a reasonable level."