Green Turbine

GREEN TURBINEtm has developed a small light weight turbo generator, with a relatively high efficiency. This micro turbo generator is a compact steam turbine with an output in the range of 1-15 kW. Turbines this small did not exist until now.

The advantages related to the other types of generators are:

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  • high power to weight ratio
  • silent operation
  • no vibrations
  • straight forward rugged design
  • long service intervals
  • low cost
  • external combustion, fit for all types of fuel
  • clean combustion, no pollution by lubricants
  • very flexible in electric power type: AC, DC, 1 or 3 phase, voltage, frequency
For proper operation the turbine needs the following components:
  • A condenser (plate heat exchanger)
  • A vacuum pump, also working as a condensate pump
  • An overspeed protector device
  • A rectifier
  • An inverter, if grid connection is required
Green Turbine can offer advice on these components. Please contact us for more information.

More information and specifications:

pdf iconDownload our Brochure (PDF)

pdf iconDownload the Flyer Green Turbine 1.2 kW (PDF)

The Green Turbine 15 kW is currently being developed. The Beta version is expected to be ready in Q3 of 2013

pdf iconDownload the Specs Green Turbine 15 kW (PDF)

Customization options

We can help you explore how the Green Turbine can be made suitable for your application. For example, possible modifications for the use of deviating pressures and / or temperatures or the usage of ORC fluids.

Please, contact us for more information and a quotation

Green Turbine 1.2 kW

greenturbine photo

The GREEN TURBINEtm 1.2 kW is now available for sale.

The weight of a GREEN TURBINEtm of 1,2 kW output is approximately 9 kg, The length is 28 cm, diameter is 19 cm.

Steam pressure is 5,2 bar absolute, condenser pressure is 0,1 bar.
A higher condenser pressure (0,25 bar) is possible but output and efficiency will be lower.
Temperature of the steam is 200 C.

The generators deliver 3 phase AC, frequency 1000 Hz. After rectification the power is fed to a DC/AC converter, capable of conversion to the desired output (e.g. 120 VAC/60 Hz). The smallest size of the GREEN TURBINEtm will deliver 1 kW, the largest size 15 kW.

The modern design (patent pending) does not need guide blades and gears, increasing reliability and efficiency. Losses are further reduced by using a near vacuum for the turbine wheels and generators.

The main advantages are:

  • Low weight
  • Low cost
  • Low maintenance
  • Long life
  • Low noise, low vibration

The high speed, about 30,000 rpm, makes a very compact machine.

The use of a condenser results in a closed feedwater/steam circuit. The heat, released in the condenser, can be used for heating or cooling purposes.


The GREEN TURBINETM is a generator using external combustion, electricity can be generated with every available fuel. External combustion makes its possible to control combustion and therefore emission levels to a very high degree. As the temperature of the steam is relatively low (200 C), waste heat can often be used to fire the turbine, enabling combined cycle applications with the turbine as second stage. This type of application enhances the total efficiency.

A CHP domestic heater with a GREEN TURBINETM can have an overall effiency of 95% or higher and will save 1 ton CO2 annually. That is because part of the electricity we need in a household is self-generated and not purchased from the grid. Public power plants generate electricity with an efficiency of approx. 45%. So 55% of the energy is waste heat, dumped in the environment. The fossil fuel, associated with this 55% waste energy, is converted to CO2 and can be saved if we use CHP. If all 80 million households in the US use CHP units, 80 million tons CO2 annually will be saved. This represents a huge decrease in CO2 output, not only in absolute terms but also relatively.

Another benefit is the fact that 80 million CHP units, having even a small capacity of 1 kW each, represents a total capacity of 80 gigawatt. That is the capacity of 80 large conventional power plants. Those plants, otherwise needed for satisfying increasing demand, will not be built. The corresponding power infrastructure, such as transmission lines, transformer stations etc. are also unnecessary. This represents large capital costs savings and less environmental impact.

In a number of countries, subsidies are available to promote the use of domestic CHP units. This can be a subsidy for investment, tax, or the price for power being fed back into the grid. Those subsidies can have a major impact upon the speed of market penetration.