Hybrid System Design

Stick-Built or Modular Design for Power Plant Projects? Actually, Both.

More than 10 years ago, power plants were traditionally stick-built, with each building custom designed and made for that particular plant. The major benefits of this approach were maintenance access and lowest equipment pricing, since a substantial portion of the work was being completed in the field.

Fast forward a few years and three factors started instigating a change in philosophy: centralized organizations, rising construction costs and real estate issues.


Supplementary “Duct” Firing for Combined Cycle Power Plants & How it Compares to TIAC

While both Supplementary or Duct Firing and Turbine Inlet Air Chilling (TIAC) are solutions to offset the megawatt output degradation of gas turbines when ambient temperatures rise, the two technologies take very different approaches.  With TIAC, the combustion gas turbine inlet air is chilled. In the case of duct firing, injection of fuel is utilized to increase the temperature and mass flow rate of the exhaust gases.

Rather than competing, the two technologies – duct firing and turbine inlet cooling – can actually complement each other when used correctly.

For maximum power output, power plant owners can utilizing the reliable power augmentation provided by TIAC, and balance the requirements with duct firing.  This scenario allows them to produce the required power at the lowest possible heat rate.

However, the combination of TIAC with Duct Firing is rare – most owners choose one solution over the other. Let’s look at how Duct Firing works.

Stellar Energy's fabrication facility in Jacksonville, Florida.

10 Benefits of Modular Fabrication

The modular chiller plant is a self-contained chilled water production system. An efficient and affordable alternative to the traditional stick-built chiller plant, the modular chiller plant works equally well in a building mechanical room without an enclosure, and in an open environment with an enclosure to protect the components from the elements.

The modular chiller plant is pre-engineered and fabricated with all system components. Packaged in a skid, the module is pre-piped, wired, tested and shipped to the job site where the water and power connections are made.

Modular does not mean one-size-fits-all. The modular chiller plant can be designed for primary secondary, variable primary or fixed primary operation, and it can be customized to special engineering requirements for component type, manufacturer and model.

Why Modular?  10 Key Reasons