Heat Transfer Technology

Exhaust gas bypass systems add operational flexibility, efficiency, and safety to a combined cycle power island. The heart of any bypass system is the diverter damper. Siemens’ diverter dampers combine state-of-the-art design principles and technology with empirical field data. While based on a high level of standardization, our diverters are also custom engineered to meet your specific required combustion turbine characteristics, as well as your individual requirements. Stacks, especially, are designed to your precise project specifications.

Simple cycle power plants consist of a combustion turbine and an integrated chimney or exhaust stack. Many power island projects start with a simple cycle design to minimize initial capital costs, reduce equipment installation time, and enable power generation as quickly as possible. Our design portfolio offers base mounted and elbow duct versions.

Siemens’ guillotine-type blanking plates are extensively used in exhaust gas bypass systems as a secondary shut-off device in conjunction with a diverter damper. When your combustion turbine is in operation, the damper creates a “man-safe” environment within the downstream-located HRSG. As a stand-alone solution, the guillotine damper typically utilizes a temperature-proof design with rack-and-pinion drive system and a gas-tight, fully enclosed bonnet. Almost the full cross-section of the duct is available once the guillotine blade fully retracts, resulting in a very low pressure drop.

The primary function of an HRSG stack damper is to slow down the cooling rate of your HRSG between individual gas turbine starts. During sustained shutdowns, stack dampers prevent rain from entering the HRSG. Available in standardized, parametric two-blade, or individual four-blade designs, our stack dampers can be readily retrofitted to existing HRSG stacks.

Siemens’ louver dampers are robust flow control and/or shut-off devices specifically designed for the demanding environment in combustion turbine exhaust installations. Our engineers design and build louver dampers in accordance with your plant-specific parameters and individual specifications. To ensure you have the right damper for your individual needs, we offer various designs, dimensions, and shapes—with or without duct section. Additionally, we use different construction materials based on your plant’s operating temperature and pressure, abrasive or corrosive environment, as well as other process operating conditions.

We provide a full range of spare and wear parts for your complete exhaust gas systems and damper portfolio—available for start-up and commissioning, operational and strategic purposes, as well as fulfilling long-term availability requirements. We have direct counterparts with expert knowledge and lean processes, so that we can offer both quick response times and cost-efficient solutions.

Installation: Technical advisory services support your local contractors or assembly groups. How? With our OEM expertise, we can ensure a smooth and efficient installation. Our specialists are available everywhere you are.

Commissioning: Proper installation and start-up are essential for a reliable and fault-free, long-term operation of mechanically moving equipment in severe flue gas environment conditions. Put your trust in our service expertise ensuring optimal performance during your warranty period, as well as throughout the whole service life of your installed system.

Maintenance: When considering an upgrade—whether it be a simple check or a continuous maintenance program—we offer a comprehensive selection of on-site inspection, survey, and testing services.