I checked out EchoGen's web site. I can't find any specifics on the technology. But what I did read shows that their technology is not likely to compete directly with Cyclone.
The lowest power rating for their systems is listed at 250 KW electrical. Even at their most optimistic conversion efficiency of 30% this electrical output would require at least 3 million btu/hour of heat. Cyclone is targeting sources of waste heat at lower outputs with their Waste Heat Engine. For example, the furnace at the Bent Glass facility where a WHE was recently installed has an output of only 500,000 btu/hour. This is more than enough to drive the WHE at full power. Also, I can't mention the WHE and not point out that the low pressure saturated steam exhausted from the engine can be used efficiently in many applications including water heating, space heating, and adsorption cooling... even water distillation is possible, and this could be very useful in some settings.
EchoGen is also targeting the solar thermal market. But again, it appears that their technology cannot be cost effective except in a large scale. Cyclone is developing a 5 hp rated solar thermal engine in partnership with Renovalia that I believe to be based on the WHE design. I believe strongly that the WHE design makes for an ideal small solar thermal engine.
In summary, I can't see EchoGen's technology as being competitive with Cyclone. Not only is their technology targeting different aspects of the waste heat and solar thermal markets as Cyclone, but the Cyclone engines are not restricted to these markets.
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