STM Power

STM Power develops, designs, assembles and sells ultra low emissions, external combustion, combined heat and power generators using Stirling-cycle engines. The STM PowerUnit is a compact and environmentally friendly generator of electricity and hot water.

STM Power, Inc., is headquartered in Ann Arbor, Michigan. We believe we are the world’s leading manufacturer of on-site, mechanical, electrical and cogeneration systems utilizing external combustion (Stirling-cycle) engine technology. Our PowerUnit, absorbs heat from a wide range of sources and converts it to electricity with minimal emissions and low maintenance requirements. Typical heat sources include standard gaseous and liquid fuels with options to accept landfill and digester gas, petroleum flare gas, other low-grade waste fuels and hydrogen. Waste heat from incinerators, thermal oxidizers, flue gas stacks, or other sources can also be converted to electricity, with zero fuel costs and no incremental emissions.

STM is taking orders now for its units rated at 55 kW, which will be in full commercial production in Q3, 2003. Larger units are under development.

Features and Benefits

  • STM PowerUnits have been designed to achieve 31% net electrical efficiency and 80% in a combined heat and power (CHP) mode.
  • STM PowerUnits are capable of continuous operation with simple maintenance at 10,000 hour intervals.
  • STM Stirling cycle technology is scalable to larger applications.
  • STM PowerUNits will meet the 2003 California Air Resources Board (CARB) regulations for NOx emissions.
  • The products of combustion never come into contact with any moving parts, improving reliability and reducing maintenance.
  • Less than half the number of parts of a typical internal combustion engine.
  • Very low noise and vibration
  • Unprecedented fuel flexibility
  • Can operate using an external heat source instead of fuel

 

How It Works

In contrast to traditional gasoline and diesel internal combustion engines that take in fuel and air inside the cylinder, the STM engine works differently. Instead, the STM engine contains a sealed-in amount of working gas that is used over and over. Rather than burning fuel inside the cylinder, the STM engine uses external heat to expand the gas contained inside the cylinder and push against its pistons. The STM engine then recycles the same captive working gas by cooling and compressing it, then reheating it again to expand and drive the pistons, which in turn drives a generator.

 

PDF Literature

STM Power Product Brochure

 

For More Information

STM Power, Inc.
275 Metty Drive
Ann Arbor, MI 48103 USA

Phone: 734.995.1755
Fax: 734.995.0610 FAX

Go to the STM Power web site at www.stmpower.com

 

 

Source: STM web site 5/2003