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Heat Transfer Technology

An efficiency boost

Steam is an essential element in the energy supply system. As a primary energy source, it fulfills many important functions, whether it’s used to operate a turbine, as process steam for use in industry, or for district heating. Therefore, heat recovery steam generators (HRSG) are important components of many power plants: They substantially increase a plant’s overall efficiency, and help to minimize the costs of fuel. You also benefit from greater flexibility when operating at part load during load changes or by simply utilizing one of our diverter bypass stack systems.  

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Heat Recovery Steam Generators (HRSGs)

Innovative and flexible HRSG solutions

Siemens Heat Transfer Technology (hereafter Siemens) is a reputable OEM HRSG supplier, previously operating under the NEM brand name. We have provided the boilers behind many gas turbines, varying in size from 10 MW up to the largest machines, and for all kinds of fuels and applications. We offer a wide variety of boiler designs in order to be able to meet your specific requirements, focusing on the lowest total installed and/or operational costs. Since we can supply both horizontal and vertical boilers, we can optimize the boiler configuration to the smallest possible plot space available.

The benefit of design: fitting your purpose

Delivery concepts and site construction
We can supply our HRSGs in all kind of prefabricated concepts, which enable you to optimize the total installed costs. They can be delivered in the form of small parts due to transport limitations, or even complete pre-erected units (‘plug & play’ design) in order to minimize construction site costs/risks, whether for onshore or offshore applications.

Fast Start & Cycling Operations
Siemens is a worldwide provider of two types of Fast Start HRSG technologies: Benson® and DrumPlus™. Siemens’ HRSG fast start solutions offer a quick response to power demand, while maintaining the lifetime of any HRSG. This ability is of special importance in so-called spot markets and locations where the daily fluctuation in power is aggravated by power fluctuations of renewables. Siemens’ fast start solutions allow unrestricted gas turbine ramp-up which results in remarkable flexibility, reduced start-up costs, quick delivery to the grid and significantly lower CO and NOx emissions during start-up.

DrumPlus™ heat-recovery steam generator

The innovative drum design used in the DrumPlus HRSGs allows power plants to power up quickly, which is required in many applications today. Reduced wall thicknesses and smaller injectors enable about seven times the life cycle of a conventional drum boiler, while significantly reducing peak stresses. The first of its kind in commercial operation, this fast start boiler technology enables your gas turbines to reach up to 150 MW in just ten minutes – making start-up holds a thing of the past.

Benson® technology

The Benson® boiler is capable of starting up in a very short time; it is also suitable for advanced steam parameters and has a high degree of flexibility. It can be constructed either horizontally or vertically. We are the only vertical Benson HRSG supplier in the world for F-class gas turbines and higher.

Learn more about Benson technology

Drum Type Steam Generator (DTSG)

DTSGs offer a high degree of standardization of the pressure part modules, which enables a significant shorter overall lead time.
The concept results in lower installation costs, less site risks and potentially an earlier PAC for the complete plant.
The major advantages of the DTSG-concept can be summarized as follows:
- Major advantages:
- Smaller footprint
- Complete modular design
- Faster construction time
- Inclusion of SCR and duct burner without impacting footprint
- Ideal for cogeneration applications

Once Through Steam Generator (OTSG)

The OTSG design offers fast start-up and shutdown capabilities. The small footprint makes it suitable for both onshore and offshore applications, like floating platforms. It is able to cope with lesser fuel quality. When required, the HRSG can be designed for dry-running capability. The gas turbine continues operation and can be shut down later, at any given moment.
The design also offers the benefit of a short construction time. Once-Through HRSGs for industrial power and co-generation are compact and flexible.

Download HRSG brochure
Free webinar, Feb 14 - Mar 5

Our highly efficient power plants are now available on floating devices!

Floating power plants’ unique characteristic is the ability to deliver them in one piece; almost completely pre-installed following a smart plug & play philosophy. Our new SeaFloat floating power plant concepts can be utilized for mobile and/or permanent installation to alleviate energy shortages for national grid or industrial application. Mobility, flexibility, decentralized power generation, shorter construction time, reliable technology, robust design, optimization for easy maintenance bring benefits and increase your added value. Join our first webinar:

Register now!

Waste Heat Recovery Units (WHRU)

Harnessing energy to the maximum

The WHRU offers an efficient method of recovering thermal energy from the waste heat of gas turbine exhaust gases. This method allows a significant increase in the efficiency of the turbine train, and a decrease in both fuel demand and pollution. We are able to supply the entire scope for your gas turbine train, bringing the total number of parties required for project realization back to only one. The standardized design fits every type of gas turbine, ranging from 10 to 70 MW. It is therefore in perfect harmony with, but not limited to, the existing Siemens gas turbine portfolio.

Easy construction

The pre-assembled WHRU modules can easily be stacked and can be constructed in a short total time span of less than eight weeks. No inside welding activities are required in order to realize construction.

Flexible configuration

The WHRU modular design provides great flexibility. The standardized configurable modules mean the design can be easily optimized to suit any customer requirement.

Tailor-made production

The WHRU’s pressure part design is calculated and fabricated specifically for each project and customer need.

Download WHRU brochure
Exhaust and diverter solutions

Broad product spectrum for every need

Siemens is recognized globally for quality and innovation in the area of exhaust stacks and diverter systems. Wherever a tight shut-off or good control is required, we’re there with a variety of dampers for the power, oil and gas and environmental industry. Exhaust stacks and bypass systems, incorporating diverters and silencing equipment for gas turbine plants are the main focus in our extensive product portfolio. Choose from a variety of high quality products that best meet your individual needs.

Combined cycle exhaust gas bypass systems with diverter

Providing customizable technology

 

Exhaust gas bypass systems add operational flexibility, efficiency and safety to your combined cycle power island. Our diverter dampers combine state-of-the-art design principles and technology with empirical field data and vast experience. While based on a high standardization level, our diverters are always custom engineered in order to meet your specific project requirements.

Simple cycle exhaust gas stacks

Time and money-efficient

 

Every simple cycle power plant requires an exhaust stack. Our design portfolio offers base-mounted and elbow-duct versions, which are easily convertible with a matching retrofit diverter if required at a later stage. Extreme short delivery times are a major advantage, contributing to fast power generation.

 

 

Guillotine dampers and blanking plates

Putting safety first

 

Our guillotine-type blanking plates are extensively used in bypass systems as a secondary shut-off device in conjunction with diverter dampers. The alternative, as a stand-alone solution, is formed by guillotine dampers utilizing a temperature-resistant design with rack-and-pinion drive system and a gas-tight, fully enclosed bonnet.

 

Stack dampers

 

Keeping your HRSG warm

 

The primary function of our smart, pressure-relieving stack dampers is to slow down the cooling rate of the HRSG. 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 retrofitted to existing HRSGs.

Louver dampers

 

Suitable for the toughest conditions

 

Our louver dampers are robust flow control and/or shut-off devices, specifically designed for the demanding environment in combustion turbine exhaust installations. To ensure that you select the right damper for your individual needs, we offer various designs, dimensions, materials and actuation concepts.

Spare parts and after sales

 

Maintaining high-operational ability

 

We provide a full range of exhaust gas and diverter system spare and wear parts for start-up and commissioning, operational and strategic purposes. With the supply of these parts we enable you to meet the long-term availability requirements of your installation.

Our damper experts with extensive know-how and experience stand for quick response times and cost-efficient solutions.

 

Field services from installation to maintenance

Standing by your side

 

Installation: experienced technical advisors are supporting your local contractors and/or assembly groups during installation.

Commissioning: our service experts are available to provide top-notch start-up and commissioning services.

Maintenance: professional on-site inspections and site surveys are accompanying these crucial products throughout the whole service lifetime. 

 

Download EDS brochure
Azura Power West Africa Ltd. Azura Edo Nigeria

Simple cycle stacks: economical design for easy initial installation

  • Three GT open cycle exhaust gas stacks (convertible) with a stack height of 35 meter downstream SGT5-2000E gas turbine

  • Simple and economical design for ease initial installation

  • Clean breakaway points for faster conversion to combined cycle resulting in decreased GT downtime

Read the customer story
Karabatan Utility Solutions Karabatan Kazakhstan

Diverter damper providing safety and operational advantages in extreme environment

  • The 310 MW combined cycle plant is equipped with four  diverter/blanking plate systems

  • Standardized approach comprises electrical actuators for cost optimized approach

  • 100 percent gas tightness with low auxiliary power consumption

Find out who our customers are
Egyptian Electricity Egypt Megaproject Egypt

Exhaust Gas Bypass Systems (EGBS) for early power and operational flexibility

  • Three of the largest combined cycle power plants in the world, each equipped with eight EGBS downstream SGT5-8000H gas turbines

  • Fast track: all twenty-four  units installed in record time

  • Reliable, simple and combined cycle power generation

Read the customer story
Kallpa
Puerto Bravo
Peru

Simple cycle exhaust gas stacks: economical design for easy initial installation

  • Four GT simple cycle exhaust gas stacks (convertible) with a stack height of 27 m (designed for extension up to 42 m)

  • Simple and economical design for ease of initial installation

  • Clean breakaway points for faster conversion to combined cycle resulting in decreased GT downtime

Find out who our customers are
Panda Power
Sunbury
USA

Stack dampers: prevents cooling down of boilers during short shut down phases

  • Three Stack Dampers for DrumPlus™ HRSGs

  • Stack dampers protect against rain and drainage

  • Overpressure relief in case of process upsets

Learn more about the project
Lakdhanavi Ltd.
Kerawalapitya
Sri Lanka

Louver dampers: aerodynamic design resulting in the lowest pressure drops

  • Two louver dampers with T-box and guillotine with blind plates and bypass stack (50 meters)

  • Most precise flow control ability versus other damper types

  • Rapid blade response time when required, ideal for “flying takeover” boiler operations

Find out who our customers are

Download EDS brochure
Service and warranty

The Siemens’ guarantee

Our high-standard of engineering and maintenance services; our in-depth know-how about the power generation process and its components: This is what operators of power plants around the globe benefit from. With more than eighty years of experience, Siemens is an OEM with the reputation for solving steam generator challenges. With us at your side, you can maximize your performance, while simultaneously lowering both costs and risks. Our engineering staff, tools, and work processes are second to none giving you the competitive edge.

Engineering services

At Siemens, we understand that your needs are as unique as your business. Operational conditions, location, operating environment, and age of the facility often vary. To discuss expectations and possibilities, we will send a senior engineer to your site. Once on site, he or she will thoroughly analyze your individual situation. For new plants, issues like plant operation mode, efficiency, and reliability will be defined exactly. 

High-energy piping assessments

Often difficult to predict, piping failures can be catastrophic. While failure is infrequent, day-to-day operations (especially cycling) might add stress to your system beyond the allowed design limits. Our certified inspectors can provide technical support for ASME FFS-1 fitness-for-service analysis

- Piping stress/flexibility calculations
- Recommendations on repair
- design changes
- Metallurgical analysis of failed sections

HRSG and power boiler inspections

We are highly qualified as an OEM to inspect and provide additional services and parts for your HRSG(s) and fire boilers. Both approach and results are time-tested – maximizing uptime and minimizing risks, costs, and downtime. Incorporating the latest technology and experience, our engineers analyze your needs based on inspections.

Spare parts

Siemens is dedicated to providing customers with the highest-quality replacement parts, delivered in a timely manner. As a leading OEM in the boiler- and HRSG-market, we have unique relationships with equipment vendors allowing us to secure the best quality and overall value for replacement parts.

Downloads, support, and services

Your source of information

This is where you can find material to download, contact details, and links to the services we offer.

Flyers and brochures

Technical papers

 

  • +491805242471

    (Charges depending on provider) (From the German fixed network € 0.14/min. and from the German mobile phone networks max. € 0.42/min.)

Energy Customer Support Center

 

Siemens AG 

Freyeslebenstrasse 1 

91058 Erlangen 

Germany

Plant service

Maintenance, repair, modernization – our Power Generation Services ensure that your facility maintains its value. Enjoy long-term confidence.

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Financing

From consulting to financing – Siemens offers financial solutions for business-to-business customers worldwide. Talk to the experts.

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References

A selection of our projects around the world

Diamantina Power Station Pty Ltd
Mount Isa
Australia

Flexible power for the mining industry in Queensland

  • Four heat-recovery steam generators for efficient combined cycle operation

  • With duct firing for even more flexible operating choices

  • Four exhaust gas bypass stack systems for early power generation and flexibility 

Read the reference brochure
NUON Power Projects
Netherlands

Siemens HRSGs powering the Netherlands

  • Natural gas combined cycle power plant of approx. 1,300 MW

  • Capability to be converted into an Integrated Gasification Combined Cycle (IGCC)

  • Designed for future operation on syngas and prepared for future addition of a boiler house

Learn more about the project
NRG Inc.
El Segundo
USA

Unrestricted gas turbine ramp with FlexPlant

  • Two DrumPlus™ HRSGs offer quick response to power demand

  • Fast gas turbine starts lead to reduced start-up costs 

  • Significant lower NOX emissions during start up

Read the project announcement

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Give your power plant a boost

Does your power plant need to provide flexible dispatch? Or do you want to be able to extract heat? In both these cases, a steam generator is essential: and we’ll find the right technology for your needs.

Talk to us about your particular challenge

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