Pick a layout that does not fit your load and you either burn more fuel than you need for decades, or spend years and capital on a combined-cycle plant your site cannot keep busy. Both choices put your project returns at risk.
Layouts Chosen for Your Load, Not a Brochure
USP&E designs and builds gas turbine power plants for industrial, mining, utility and data-centre clients, and the layout question comes up at the start of every project. USP&E brings 150+ power projects in 45+ countries and 25,000 MW contracted since 2002, and our 400+ engineers and project managers can compare layouts against your load profile, fuel and site and deliver the chosen plant. We work under ISO 9001 and ISO 45001 certified systems with FCPA and OFAC controls. USP&E is a full-service EPC and O&M contractor, not a broker.
How a Simple Cycle Plant Works
In simple cycle, the gas turbine drives a generator and the exhaust goes to atmosphere through a stack. The plant is compact: turbine package, fuel gas skid, inlet filtration, exhaust stack, generator step-up transformer and switchgear. It starts fast, especially with aeroderivatives, and can be built quickly.
The trade-off is fuel efficiency. A large share of the fuel’s energy leaves as hot exhaust. Simple cycle suits peaking, backup, bridge power and sites where the plant runs fewer hours or where speed to power matters more than fuel cost.
Simple cycle also keeps your operating team small. With no steam cycle, there is no boiler water chemistry, no condenser and fewer rotating machines to maintain, which matters on remote industrial sites where skilled staff are hard to find and keep.
How a Combined Cycle Plant Works
In combined cycle, the hot exhaust passes through a heat recovery steam generator, which makes steam to drive a steam turbine. That extra generation comes from the same fuel, so combined cycle uses fuel much more efficiently. It also needs much more equipment: HRSG, steam turbine, condenser, cooling system, water treatment and more complex controls.
Combined cycle suits steady base load running most hours of the year. It takes longer to build and start, needs water or air cooling, and requires a larger operations team. A middle path is combined heat and power, where exhaust heat produces steam or hot water for your process instead of a steam turbine.
| Feature | Simple cycle | Combined cycle |
|---|---|---|
| Main equipment | Gas turbine, generator, stack | Adds HRSG, steam turbine, cooling |
| Fuel use | Higher per MWh | Lower per MWh |
| Start and ramp | Fast | Slower |
| Build time and footprint | Shorter, smaller | Longer, larger |
| Best fit | Peaking, backup, bridge | Steady base load |
What Each Layout Needs on Your Site
Both layouts need a reliable gas supply at the right pressure and quality, an electrical connection with protection studies, and space for maintenance access. Combined cycle adds water supply and discharge permits or a large air-cooled condenser, more land and a longer permitting path.
Many industrial buyers start in simple cycle and add heat recovery later, once the load is proven. If that is your plan, leave space and design the exhaust system for the later conversion. The USP&E guide to gas turbine power plants explains the main plant systems.
Choosing Equipment for Either Layout
Your choice of turbine shapes the plant. Aeroderivatives suit fast-start simple cycle, while heavy-duty units such as a remanufactured GE Frame 6B suit base load and heat recovery. Compare used/new gas turbines and natural gas engines/stations for smaller loads, and size gas turbine generators to run near their best load point. For US hyperscale campuses, the New USP&E FX-45 45MW Modular Gas Turbine for the Hyperscale Data Center sector in the USA offers 2028–2030 slots, with USP&E delivering hyperscale EPC/O&M for AI gas turbines, hyperscale generators and gas turbines for compute.
See how natural gas power plants are planned and built, and read this independent aeroderivative gas turbine guide for fast-start options. This site’s guide to EPC and O&M for new and used gas turbines covers delivery.
Where USP&E Supports Your GT Commissioning Project
If your new GT commissioning programme is in the United States, your first conversations run through USP&E’s US offices in Colorado Springs (1755 Telstar Dr, Suite 300) and Knoxville (800 S Gay St, Suite 700). They keep you close to developers, utilities, gas suppliers and US equipment sources, and they can walk your site before anything ships.
Johannesburg (22 Kildoon Rd, Bryanston) runs engineering, protection studies and project controls for new gas turbines, commissioning spares and bridge units, and Cape Town (31 Brickfield Road, Woodstock) adds design and commissioning support. London (162-168 Regent Street) structures the contract, insurance and financing file your lenders will read, while Wuxi, China (No. 1, Ningzhou Road, Wuxi) follows up China supply chain and manufacturing.
For plant buyers, US offices lead site and gas-supply reviews, Johannesburg engineering lays out the plant, and Wuxi expedites transformers and balance-of-plant equipment. Regions served: USA | AFRICA | UK | UAE | CHINA. USP&E has delivered 150+ power projects in 45+ countries, with 25,000 MW contracted since 2002, and is ISO 9001 and ISO 45001 certified.
USP&E Track Record
These approved projects show USP&E delivering gas turbine supply and refurbishment for major clients.
- USP&E has refurbished seven GE Frame 6B gas turbines to zero hours in-house for major US hyperscale data-centre developers.
- Barrick Gold, Loulo-Gounkoto, Mali: USP&E rebuilt and expanded the mine’s Caterpillar engine power station and restored reliable supply to the process plant. Read the case study.
- NEOM, Saudi Arabia: USP&E supplied zero-hour Siemens SGT-400 gas turbines and acted as the single technical and commercial interface. Read the case study.
How to Choose a Gas Turbine Plant Layout
Your 3-step plan: 1. Share your load profile, gas supply and site. 2. Compare simple cycle, CHP and combined cycle. 3. Design, build and commission the plant.
- Record how many hours a year the plant must run and at what load.
- Confirm gas pressure, quality and supply reliability.
- Check water availability and land area for heat recovery.
- Compare simple cycle, CHP and combined cycle on fuel and schedule.
- Leave space for future heat recovery if you start in simple cycle.
FAQ: Natural Gas Turbine Generator Plants
Which USP&E offices support gas turbine plant projects?
USP&E supports gas turbine plants from Colorado Springs and Knoxville for US site and gas-supply reviews, with Johannesburg leading plant layout and engineering and Cape Town supporting commissioning. London handles structuring and finance, and Wuxi expedites transformers and balance-of-plant equipment from Chinese manufacturers.
Has USP&E delivered gas turbine power plants before?
Yes, USP&E has delivered 150+ power projects in 45+ countries, with 25,000 MW contracted since 2002, including gas turbine supply, refurbishment and plant delivery. The track record above lists approved examples you can review before you speak to our team.
Is USP&E a turbine broker?
No, USP&E is a full-service EPC and O&M contractor, not a broker. We design, supply, build and maintain gas turbine plants, so the team that recommends a layout is responsible for delivering it and for how it runs once your plant is in service.
How quickly does USP&E respond to a plant enquiry?
USP&E replies within one working day. Send your load profile, gas supply details, site location and target date, and we will come back with layout options and the turbine packages that fit. Early data on water and land helps us compare combined cycle properly.
What is the difference between simple and combined cycle?
USP&E explains that simple cycle sends turbine exhaust straight to the stack, while combined cycle recovers that heat to make steam for a steam turbine. Combined cycle uses less fuel per MWh but needs more equipment, water or air cooling, land and build time.
Can a simple cycle plant be converted later?
USP&E often designs simple cycle plants for later heat recovery, by leaving space for an HRSG and planning the exhaust system for conversion. This lets you start generating sooner and add combined cycle or combined heat and power once your load is proven.
Is combined heat and power the same as combined cycle?
USP&E treats them as related but different. Combined cycle uses recovered heat to drive a steam turbine for more electricity, while combined heat and power uses that heat directly in your process as steam or hot water. CHP suits sites with steady heat demand.
Which turbines suit simple cycle best?
USP&E usually recommends aeroderivative turbines for simple cycle peaking and bridge duty because they start and ramp quickly. Heavy-duty turbines such as the Frame 6B also run in simple cycle, but they show their strengths in base load and heat recovery applications.
Build the Plant Your Load Needs
With the right layout, your plant earns its fuel every hour it runs. With the wrong one, you carry the cost of that choice for decades. Let USP&E compare the options with you.
Talk to an engineer through the USP&E contact page, on +27 10 822 2324 or at info@uspeglobal.com. You can also search the USP&E inventory for equipment that fits.
Powering Possibility. Built for the Frontier.