Stirling Energy Systems, Inc Stirling Energy Systems (SES) is a systems integration and project management company that is developing equipment for utility-scale renewable energy power plants and distributed electric generating systems ("gensets"). SES is teamed with Kockums Submarine Systems, NASA-Glenn Laboratories, the U.S. Department of Energy (DOE), and The Boeing Company for solar power plants; and Vestas Wind Systems, the premier provider of wind turbine technology for wind systems. SES is positioned to become a premier worldwide renewable energy technology company to meet the global demand for renewable electric generating technologies through the commercialization of its own Stirling cycle engine technology for solar and genset applications, and utilization of Vestas Wind Systems. In the future, SES will also be participating in the biomass, biogas, and hydrogen markets. Headquartered in Phoenix, Arizona, SES was incorporated in Nevada in 1996. SES's engineering and technical demonstration facilities are at the Boeing Aerospace Campus in Huntington Beach, California. SES also has a test site and training facility at the University of Nevada Las Vegas.

STM Power Inc. STM Power Inc. is a developer of on-site, electricity and cogeneration systems using a proprietary Stirling-cycle (external combustion) engine. The Company refers to its products as PowerUnits which it believes produce electricity and heat more economically than other energy conversion technologies competing in the distributed generation market (fuel cells, microturbines and photovoltaic systems). The Company’s first product, a 25 kW PowerUnit, began testing in December 1999. A renewable DG product, the SunDish Solar system, has already been installed in five test facilities. To date, approximately $83 million has been invested in the Company.

"Infinia is one of the world’s leading organizations at harnessing the full potential of Stirling cycle machines.

Originally developed by Robert Stirling in 1816, the Stirling cycle uses a working fluid (typically Helium, Nitrogen or Hydrogen gas) in a closed cylinder containing a piston. Heated on one end and cooled on the other, the expansion and cooling of the gas drives the piston back and forth in the cylinder. The work performed by this piston-motion is used to drive a generator (in Infinia’s case, a patented linear alternator) or to create pressure waves to drive a compression process.

The cycle can be operated in reverse by using the generator as a motor to drive the piston. In this case, the continuous expansion and cooling of the working fluid caused by the piston motion creates a cooling effect. These types of systems are called Stirling coolers (also referred to as cryocoolers) and can maintain temperatures as low as 10 Kelvin (-263°C, and –442 °F)"

Stirling Technology, Inc are committed to the development of sustainable, environmentally friendly technologies. Since 1984 Stirling Technology have been designing Stirling cycle engines for field use. In 1989 are developed a patented Rotary Core Heat Exchanger based on the knowledge of high heat transfer requirements of Stirling engines. Stirling Technology have since been working to perfect the products through the use of high grade modern materials, and by simplifying the designs. Unlike the motors in an original units, the RecoupAerators®of today feature an unique single-motor belt driven system, which uses less energy and functions better than our earlier designs and those still used by other manufacturers of Energy Recovery and Heat Recovery Ventilators.
The ST-5 is a multipurpose external-combustion engine designed for those who either cannot obtain grid electricity easily and economically or have realized the uncertainty of total dependence on utilities to supply their power needs. Virtually any combustible material is a suitable fuel for the ST-5. Among various acceptable fuels are wood, wood pellets, husks and chaff, peanut shells, weeds and hay, cotton waste, other agro-byproducts, and natural gas.
Rugged and reliable, the ST-5 has no spark plugs, carburetor or fuel injectors and is much quieter than an internal combustion

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