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Radial Engine For Distributed Power Generation

Clear Energy Systems Inc. focusing research engineering on recip engine

Posted on October 29, 2012

The ARC930TA reciprocating engine began with a fundamental assessment of engine characteristics critical to power generation. The results of this inquiry – focusing on high-kW, high-efficiency and low internal friction – led CES engineers away from the customary adaptations of diesel-cycle mechanics to Otto-cycle purposes, and towards the rediscovery of an engine design with performance dynamics far better suited to power generation, yet often overlooked in the industry.

The radial configured, natural gas-fueled ARC930TA has been completely re-engineered and industrialized, the company said. This wholly new power plant is the result of state-of-the-art engineering methods, computer aided analysis, and precision machining and assembly techniques. Only 157 cm in diameter and 79 cm in length, the 9-cylinder radial configuration weighs just 680 kg yet delivers1156 kW – comparable to other reciprocating engines many times its size and weight, CES said.

Radial engine geometry permits a smaller crankcase and simpler, more mechanically efficient crankshaft with fewer parts and bearings, reduced contact surfaces and lower coefficient of friction. Low master and link rod angles yield transmission of cylinder pressure to the crankshaft, with all rods acting on a single crank journal.

The company said the crankshaft, extremely short and sturdy compared to longer inline and V-block counterparts, incurs no significant torsional distortion or excessive friction. Hundreds of distinct technical improvements have been built into the ARC903TA engine, including modernizations in crankshaft and rods, crankcase, cylinder heads, intake and timing systems, and electronic monitoring, diagnostics and controls. The proprietary design incorporates new bearing technology, advanced piston and ring design, contemporary metallurgy and coatings, and intricate lubrication systems to accommodate a robust duty cycle.

According to CES, the resultant ARC903TA delivers durability, extended maintenance intervals and long service life required for heavy-duty operations while retaining all of the advantages inherent in its original radial design – high kW-to-weight ratio, low parasitic losses and high operating efficiency. Air-cooled and turbocharged, the 930 features dependable, efficient, clean and compact distributed power generation, said the company.