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Stirling Engine

Stirling engine modules to generate clean electricity from waste heat locally

May 2018
Gallery Stirling Engine 1
Gallery Stirling Engine 1


Cool Energy’s novel air engine uses captured waste heat at between 150 and 400° C to produce clean electricity on-site.

In remote locations, electricity is commonly generated with diesel-fueled generators. Recovering the heat from the exhaust manifold with a Stirling engine - extremely efficient compared to internal combustion engines - can produce extra electricity, thereby reducing fuel consumption. The solution has other applications such as solar thermal and biomass generation, and can allow for significantly reduced fuel consumption.

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25kW Low-to-Medium Temperature Stirling Engine by Cool Energy

Label Date May 9, 2018
From United States
Maturity stage Prototype testing in the real world
Looking For Fundraising to build additional licensing partnerships for heat recovery and power generation, and growing their network in the European and Asian market.

The environmental benefits

  • Low-temperature power conversion of recovered heat
  • Unique design maximizes efficiency
  • Common materials that keep costs low
  • Designed for long service life
  • Can be used in combination with other renewable energy systems
  • Can be applied to industrial or remote power generation processes, such as diesel generators or natural gas generators.

The Financial benefits

  • 2-6 year payback time for typical customers, depending on operating profile and avoided electricity or fuel cost.
  • Can generate $230,000 in social benefit from avoided pollution emissions from the grid.

Activity Region

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  • Headquarters
  • Activity

Company Profile

Cool Energy, Inc.

Powering a Clean Tomorrow: Cool Energy makes the 25kW ThermoHeart Engine, converting wasted heat into clean electricity.

View company profile
Headquarters Boulder, CO 80301, USA
Contact the Solution Provider Add to Favorites

The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator Cool Energy, Inc. has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.