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Hot Air Turbines

Low impact power stations fueled with biomass or waste

Page last modified
Tuesday, March 30, 2021 - 15:48

Revolutionising the decarbonised distributed generation market by supporting smaller-scale, low impact power stations fuelled with biomass or waste to provide power and heat to our homes and places of work.

How it works:

  • Fresh air is pressurised
  • The pressurised air is heated in a heat exchanger
  • Air depressurises and cools first through the “turbocompressor” needed to pressurise the air in the first place
  • Air depressurises and cools more in a “Power Turbine” to produce electricity

There are multiple sources to heat the air:

  • Waste wood/biomass
  • Municipal waste combustion
  • Pyrolysis gas from biochar production
  • Flare gas (HX not required)


Multi-fuel compatible
High durability / reliability
High exhaust air temperatures are compatible with district heating and industrial processes
Cost is typically <2500 $/kWe
Can be coupled with Organic Rankine high efficiency combined cycle applications
Can be coupled with absorption chillers for cooling applications
Requires flue gas with a temperature above 740 Degrees Celsius


Areas of Application Low carbon distributed power generation
Business Efficiency 10–18% in simple cycle | 22-26% in combined cycle
Capabilities Feasibility studies | Design | Supply and build | Test | Commission
Certifications / licences No specific licences required
Compliance No pressurised liquids or steam reducing | Eliminating the need for pressure vessel compliance
Input Powered by fuels like: RDF | Biomass | Concentrated solar
Maintenance Designed for 24x7 operation | Typical annual maintenance schedule
Output Thermal Power output: 240kWth – 2000kWth | Electrical Power output: 50kWe – 330kWe
Power Thermal Power input: 350kWth – 2800kWth

Relative Business Impact

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Technology Readiness Level


Development Technology demonstration Mature / Proven

About Bluebox Energy Ltd

At Bluebox, we will work with you to understand your heat and electricity needs and get the best economic solution from available technologies such as Organic Rankine Cycles, Steam solutions, hot air turbines and Absorption chillers.

If heat is not required, we might also suggest a combined cycle approach that uses a hot air turbine top cycle and either steam organic Rankine cycle bottoming cycle to maximise electrical efficiency.

We also provide clients with their engineering development projects from thermodynamic analysis, building test platforms and developing control systems.

Technology deployed by:
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