Heat ReCycle solutions

Our Heat ReCycle solution is comprised of a gas turbine power plant with Organic Rankine Cycle- (ORC) technology. The combination of proven gas turbine and ORC technology for efficient recovery of waste heat is our response to the market challenges which various regions of the world are facing today. One billion people do not have any access to electricity, and another billion have a lack of reliable power supply; especially ones that are located in remote and isolated areas. Offering affordable electricity while taking the environment with water-free operation into account can be achieved with a reliable Heat ReCycle power plant solution.

Through the efficient combustion of fuel, the gas turbine generates electricity and produces hot exhaust gas. The thermal energy in the hot exhaust gas is recovered through a Waste Heat Recovery Unit (WHRU), using an organic fluid as the heat exchange medium. The hot organic fluid is used to power an ORC-turbine and generator to generate additional electricity. This combined cycle characterizes itself with simplicity compared to a water-/steam-cycle, at the same time completely eliminating the need for water at all.

The Organic Rankine Cycle's principle is based on a turbogenerator working as a conventional steam turbine to transform thermal energy into mechanical energy and finally into electrical energy through an electrical generator. Instead of generating steam from water, the ORC system vaporizes an organic fluid, characterized by a molecular mass higher than that of water, which leads to a slower rotation of the turbine, lower pressures and no erosion of the metal parts and blades.

The 3 x SGT-400 Heat ReCycle reference configuration is used as an example for explaining this new power plant in further detail. Having a three-on-one (3 gas turbines on 1 ORC turbine) configuration in the typical 50-MW capacity size range enables operational flexibility. Especially for remote locations, the 50-MW size range has traditionally been served by reciprocating engines or simple cycle gas turbines. Now, Heat ReCycle offers a cleaner and more efficient alternative, while providing a great deal of flexibility through this multi-unit set-up.

Heat ReCycle 3 x SGT-400 configuration details	SGT-400 Heat ReCycle
Configuration	3 x SGT-400
Power plant output (ISO)	52 - 58 MWe
Fuel	Natural gas/liquid fuel/dual fuel/other
Frequency 50/60 Hz	50/60 Hz
Power plant efficiency	~ 47 - 50 %
Bottoming cycle	Organic Rankine Cycle
Heat transfer medium	Thermal oil / Cyclopentane
NOX emissionson fuel gas with DLE, 15% O2	≤ 15 ppmvd

The Heat ReCycle 3 x SGT-400 configuration provides flexible, reliable and affordable power while complying with the most stringent emissions standards globally. The multi-unit set-up allows for a great deal of flexibility and plant part load capability while also reaching high efficiencies with the ORC bottoming-cycle. This 50 MW-range power plant is unique in its kind and is competitive against reciprocating engines in the same power range. The benefits include a very high power-density, attractive CAPEX, and better LCoE than similar power solutions for intermediate to base load power generation.

The SGT-400 is a simple, robust twin-shaft gas turbine, suitable for all climates and serves a power band of 10 – 15 MW. The SGT-400 is a leader in operational and fuel flexibility, low emissions, and overall efficiency. A wide range of fuel compositions can be burned while running efficiently at all loads. The turbine can meet stringent emission standards while operating as low as 30% load, and has seamless, true dual-fuel capability. With more than 390 units installed all over the globe and more than 5 million actual operating hours, it is an excellent fit to the Heat ReCycle power plant.

The Waste Heat Recovery Unit (WHRU) offers an efficient method of recovering thermal energy from the waste heat of gas turbine exhaust gases. Unlike a traditional Heat Recovery Steam Generator (HRSG), the WHRU is a single stage system using a once-through principle and is therefore less complex. The WHRU has been completely optimized around the gas turbine and is charaterized by its highly modular design for optimal constructability. The complete WHRU can be installed in less than 6 weeks and offers the lowest total installed cost.

Heat ReCycle solutions

A reliable solution for environmentally sound, affordable electricity Heat ReCycle™

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Developing remote areas

Providing affordable electricity

Producing lower emissions

Offering water-free solutions

Heat ReCycle is a gas turbine power plant with Organic Rankine Cycle (ORC) technology

The Organic Rankine Cycle

Heat ReCycle portfolio

Heat ReCycle 3 x SGT-400 reference plant

Heat ReCycle 3 x SGT-400 power plant details

Heat ReCycle plant overview and main components

Plant overview – integrated plant design concept

SGT-400 gas turbine

The Waste Heat Recovery Unit

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