FIS sCO₂ Heaters
High-efficiency sCO₂ Fired Heaters
In a supercritical CO₂ (sCO₂) power cycle, CO₂ circulates in a closed loop at high pressure and drives a compact turbine. The turbine has no combustor, so a fired heater supplies the heat, burning natural gas to heat the CO₂ before it reaches the turbine. At pressures above 2,500 psi and outlet temperatures of 550 to 600 °C or higher, the design comes down to tube metal temperature, alloy selection, pressure drop and flame clearance. FIS solves the same problems in refinery heaters.
What We Offer
Rated for your required duty, turndown and efficiency, from pilot units to multi-megawatt commercial heaters
Designed to your cycle's inlet and outlet temperatures, pressures, flow and allowable pressure drop
Coil alloys (austenitic stainless or nickel alloys) and wall thicknesses selected per API 530
Modular, shop-fabricated construction that cuts field work
Containerized option that ships in standard 40-ft containers
Why FIS
30 years designing and revamping refinery fired heaters, much larger than a typical sCO₂ unit
Established relationships with tube mills, burner and fan manufacturers, and qualified fabricators
US fabrication for the shortest schedule, or overseas fabrication when cost matters
FIS manages design, procurement, inspection and shipping
Additional Heat Input Schemes
Waste Heat Recovery Units
If your cycle will take heat from gas turbine exhaust or another hot gas stream instead of a burner, we can design the waste heat recovery unit. It uses the same finned-coil convection module as our fired heaters, sized on its own with a duct, stack and bypass damper. We lay out the coils for maximum heat recovery, evaluate whether supplemental firing is worth adding, and design the system around the exhaust you have.
Heat Transfer Support for Other Heat Sources
If you choose a different heat source, such as a nuclear reactor, molten salt or thermal storage, the heat still has to get into the CO₂ at high pressure and temperature. That is the same heat transfer and metallurgy problem we work on every day. We can develop the heat transfer scheme, design and procure the exchangers, and manage fabrication and inspection, so your team can stay focused on your core technology.
Developing an sCO₂ power cycle?
Send us your cycle state points (flow, temperatures, pressures and duty) and we'll follow up to discuss a heater configuration.