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Cyclone Power Technologies’ licensee in China completes build of initial prototype engines

External combustion engine developer Cyclone Power Technologies announced that its licensee in China, Great Wall Alternative Power Systems Ltd., has completed the build of the first prototype engines under its license agreement and has begun in-house testing of these units. The engines built by Great Wall are based on Cyclone’s WHE-25 design, and are meant for use with biomass-to-power generator systems. (Earlier post.)

Applications will include distributed combined heat and power (CHP) systems, and power sources for bio-char producing environmental remediation equipment. Initial compressed air testing of Great Wall’s engines has been successful, and steam testing will commence shortly. These units will ultimately be manufactured and sold only in China.

We see a multi-billion dollar market for distributed power in China’s rural areas. With the Cyclone Engine, we can deliver viable, low cost biomass-based power solutions integrated with a bio-char process that can help remediate water and soil pollution. Operating within China can sometimes be challenging, and that has admittedly pushed back our production schedule. We are pleased to be back on track, and fully committed to seeing this project through to completion.

—Great Wall’s Managing Director, Robert Devine

Led by a group of veteran China operators and investors, Great Wall is focused on developing Cyclone’s technologies for the Chinese market. Great Wall’s Chairman Zhan Shan, a PRC national, founded several new energy ventures including China’s first private municipal gas company, and was China’s first technology developer of large-format lithium-ion batteries.

The patented Cyclone Engine is an external combustion engine designed to achieve high thermal efficiencies through a compact heat-regenerative process, and to run on virtually any fuel while minimizing the release of greenhouse gases and criteria pollutants.



This is a nice design and 10% recovery is better than nothing, especially when it can be done 24/7 from waste heat that was doing nothing anyway.

Roger Pham

Biomass is too valuable to be used in a steam engine at lower efficiency than gasification process in IGCC plants at 60% efficiency. Biomass contains valuable organic compounds for use as feedstock in chemical industry.


CC is 60% IGCC is 50%, we went through the numbers on another article here. This could work with waste heat from lots of processes, not just biomass.

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