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HRSG Coverage Increases at WTUI as LM Cogen, Combined-Cycle Facilities Multiply

Thermal shock can occur in panel type economizers and HRST Inc’s ShockMaster economizer is designed to resist tube cracking and other issued caused by thermal gradients. Buoyancy instability is also a cycling issue that causes flow stagnation in panel type economizers.

Revision Date:  7/20/2015

Tags:  221112 - Fossil Fuel 化石燃料, HRST, Heat Recovery Steam Generator, Economizer, Thermal Shock, Combined Cycle Journal

How to Boost HRSG Performance and Increase Your Plant’s Bottom Line

The performance thieves lurking in many heat-recovery steam generators sometimes can be eliminated with relatively little effort and at low cost. This article discusses four primary performance thieves: Gas baffling, Gas-side fouling, LP economizer recirculation and Buoyancy instability/vapor locking.

Revision Date:  7/20/2015

Tags:  221112 - Fossil Fuel 化石燃料, HRST, Heat Recovery Steam Generator, Economizer, Performance, Thermal Shock, Corrosion, Heat Recovery, Combined Cycle Journal

How to Reduce the Startup Time of a Legacy Combined Cycle

Legacy HRSGs in service may restrict or limit the plant startup rate, but some possible upgrades can reduce the amount of time it takes to bring a combined cycle online. This article discusses three options: steam sparging, controlling the HP-drum termperate ramp rate independently of the gas turbine startup rate be venting steam, and lay-up practices.

Revision Date:  7/20/2015

Tags:  221112 - Fossil Fuel 化石燃料, HRST, Heat Recovery Steam Generator, Startup, Combined Cycle Journal

Smart Starts Mitigate HRSG Damage, Preserve Reliability

A smart start is one that is able to fulfill these three goals: 1) Avoid damage and preserve reliability (more specifically, minimize damage from thermal stress and overheating); 2) Permit rapid loading of the gas turbine; and 3) Provide steam at the proper flow rate and temperature to the steam turbine.

Revision Date:  7/20/2015

Tags:  221112 - Fossil Fuel 化石燃料, HRST, Heat Recovery Steam Generator, Attemperator, Economizer, Thermal Shock, Startup, Maintenance, Combined Cycle Journal