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Heat ReCycle solutions

It is often impossible to put a price on the value of water, especially in regions where water is a scarce resource. 

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

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.
Stories article
Strories article

Electrifying rural and remote off-grid locations: Why LPG power plants are ideal

Combining gas turbines and an Organic Rankine Cycle, Heat ReCycle offers a compact solution for stand-alone energy requirements. Siemens Energy manager Wolfgang Klink takes us on a short walk in the woods to demonstrate why the use of LPG fuel makes this solution ideally suited for power generation in rural or remote off-grid areas.

Heat ReCycle Solutions

Responses to market requirements

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

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.

Organic Rankine Cycle Technology

The Organic Rankine Cycle

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 Heat ReCycle ORC unit including the air-cooled condenser - below highlighted in yellow- is supplied by the Italian company Turboden S.p.A. With more than 372 ORC installations in over 42 countries providing over 600 MW of power, Turboden is a globally leading company in the field of ORC technology.

Heat ReCycle portfolio

The Heat ReCycle range of power plants provides a wide choice of different industrial and aeroderivative gas turbines. The power plant can be customized for the required project-specific boundaries, such as power output and operating load regime. Heat ReCycle power plant configurations are possible from roughly 10 to almost 100 MWe capacity.

Heat ReCycle 3 x SGT-400 reference plant

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 power plant details

The total power plant output of this configuration is in the range of roughly 52 - 58 MW, depending on the GT version and project conditions. See more plant details in the below table:

Heat ReCycle 3 x SGT-400 configuration details

SGT-400 Heat ReCycle

3 x SGT-400
Power plant output (ISO)
52 - 58 MWe
Natural gas/liquid fuel/dual fuel/other
50/60 Hz
Power plant efficiency
~ 47 - 50 %
Bottoming cycle
Organic Rankine Cycle
Heat transfer medium
Thermal oil / Cyclopentane

NOX emissions

on fuel gas with DLE, 15% O2

≤ 15 ppmvd

Heat ReCycle plant overview and main components


Siemens Energy Heat ReCycle solutions factsheet

Heat ReCycle is a gas turbine based power plant with an Organic Rankine Cycle (ORC) as bottoming cycle. These power plants are designed specifically to reduce both CAPEX and OPEX compared to a water/steam cycle while maintaining a relatively high level of efficiency. Please fill out the form below and receive your download link.

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