STM Stirling Generator set

• Original caption is as follows:

A Stirling engine and induction generator set. This is a 55 kW (electrical) generator set for combined heat and power applications. The total enclosure length is about 2.5 metres, and this assembly has a mass of about 1300 kg.

At the right side is the combustion chamber and heat exchanger. The four-cylinder regenerative Stirling engine is adjacent to the combustor, with the swash-plate drive housing obscured by the center post of the enclosure. At the left of the picture is a 55 kW induction motor used as a generator and to start the Stirling engine.

Below the induction generator terminal box (black cable going to left) is an electrolyzer used to replenish the hydrogen gas working fluid of the engine. To the right of the electrolyzer is a small blower to force combustion air into the burner assembly. The blue hoses circulate cooling water through the cool-side heat exchanger - a hose connection point for cooling water is just above at the right end of the induction generator.

The Stirling engine/generator set shown here is made by STM Power Inc. and is intended for auxiliary power and heat production at large farms, or for plants that produce waste flammable oils. This engine can also be adapted to run on low-heat-value landfill gas or biofuel digester gas.