W-Style® Air Cooled Condenser

An innovative new design with induced draft capabilities for larger power plants

W-Style® Air Cooled Condenser


About W-Style ACC®

W-Style ACC® is an innovative Induced Draft Air-Cooled Condenser (ACC) directly condensing the steam turbine exhaust flow. The condensate returns to the boiler without any water loss.
With its unique “W” heat exchanger structure, the amount of steel and overall height of the ACC are dramatically reduced (compared to traditional forced draft arrangements).

The shortened finned tubes lead to a reduced ACC back pressure and a smaller risk of flow accelerated corrosion. The W-Style ACC® has lower overall steel weight, is less wind sensitive and offers a reduced back pressure at low temperatures. These characteristics result in an improvement of the average annual power plant output.

Features of
W-Style ACC®

The W-Style ACC® module utilizes our proven Single-Row Condenser (SRC®) finned tubes. The heat exchangers are arranged in a “W” shape. Two large steam manifolds at the bottom distribute the steam to the heat exchangers. To improve effective non-condensable gas extraction, the heat exchanger system includes primary, secondary and tertiary tubes. The induced draft axial fans, gearboxes and motors are mounted above the heat exchangers. The “W” structure provides central support for the fan bridge mitigating vibration.

W-Style Air Cooled Condensers steam cylce

Installed projects in pictures


State of the art

W-Style ACC® benefits of improved access for drive system maintenance.


Cost effective

The “W” shaped structure leads to lower overall height, a reduced number of foundations and thus a smaller footprint.



The innovative W-Style ACC® reduces steam velocity in the finned tubes mitigating flow accelerated corrosion inside the finned tubes.



W-Style ACC® offers Induced Draft ACC and decreased wind sensitivity.


Case studies
of W-Style ACC®

Get to know clients that installed a W-style ACC® system.

Case study: Chiahui
Highlighted case
Case study: Chiahui
SPG Dry Cooling has designed, manufactured, delivered and erected the ACC of the 500 MW expansion Chiahui combined cycle project located in the Chiayi county (Taiwan).
View case

Service & Support


Minimize the risk of downtime and expand asset`s lifespan. Tailored to your needs, SPG Dry Cooling offers a variety of maintenance services. Keeping your dry cooling system performing at optimal levels. Our programs allow you to conduct best practices, maintenance and repairs in an efficient way.

Start your journey with
SPG Dry Cooling

All projects require a different and unique approach. Your first
point of contact with SPG Dry Cooling will be our dedicated and
experienced sales team. You will have a committed team
(project manager, engineering team, quality control officer,
logistics officer) at your disposal through the whole process.
Our team members offer a high quality of customer care and
strive for excellence in service delivery. Please reach out for
more information or a personalized quote.

contract (1)

Contract Signature

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Kick-off Meeting

With our Project Manager, Engineering team, Quality Control Officer, Logistics officer, as well as with equivalent representatives from the client-side.


Engineering phase

In the first phase, we will hand the client a basic design of the requested product. In the second phase, we will start with a more detailed design.


Procurement phase

With our Project Manager, Engineering team, Quality Control Officer, Logistics officer, as well as with equivalent representatives from the client side. Our Sales Manager will also be there, and often the client’s procurement manager too.

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Fabrication phase


Delivery to client

We can make the equipment and materials available for client pick-up. Or we can deliver goods to the project site.


Erection on site

Erection services can be provided as an option.



Commissioning supervision is provided by one of our experienced technicians.


Warranty period

Discover our innovative products

Looking for a product that offers optimum energy savings and maximal comfort? Select your product and discover a wide range of benefits.

A-frame Air-cooled condensers immediately condense the steam turbine exhaust flow and return condensate to the boiler without water loss. They are frequently used in electrical power plants and waste to energy plants of all sizes.
ModuleAir® is an innovative modular air-cooled condenser (ACC) that directly condenses steam turbine exhaust flow and return condensate to the boiler without any water loss. With construction savings of up to 25%, compared to a standard A-frame, construction time can be reduced by several months for large power plants.
BoxAir ACC® is an innovative Induced Draft Air-Cooled Condenser (ACC), suitable for all power plants ranging from 1 to 30 MWe. This ACC type consists of standard boxes that are easy to assemble and that offer a short delivery schedule and high reliability level. BoxAir ACC® is used in waste incineration plants, biomass, solar and geothermal power plants and is suited as a capacity increase of an existing power plant.
Hexacool® is a standardised, modular air-cooled condenser (ACC) which is easy to build and robust in performance. It is used in waste-to-energy, biomass, small size electrical power plants and industrial co-generation. Hexacool® induced draft configuration saves up to 15% fan power consumption.
An Indirect Dry Condensing system connects an Indirect Dry Cooling tower (IDCT) with a steam surface or jet condenser. Its tall concrete or steel shell eliminates hot air recirculation. Indirect Dry Cooling solutions offer a reduced maintenance and are suited for large capacity condensing units.
Air-Cooled Heat Exchangers (ACHE) are custom designed heavy-duty fin tube heat exchangers. They allow the direct cooling by air of various process mediums. ACHEs are used in applications in many industries, such as power, chemical, ORC plant, Oil & Gas, steel and several other industries.

Get in touch

Questions about
W-Style ACC® ?

Interested in learning more about W-style ACC® systems? Share your project request, and we'll get in touch with you very soon!