Centrifugal Compressor Cooling” patent Application Published by USPTO


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Lafayette, Colo. —December 13, 2018. The US Patent and Trademark Office recently published Frontline’s patent application titled: Centrifugal Compressor Cooling (US 2018/0355887 A1). The device is a replacement housing for gas turbine compressor with centripetal compressors. A typical application would be as the last stage in a mixed axial centripetal gas turbine compressor, such as a Rolls-Royce Model 250 helicopter engine. The design uses a coolant either fuel or liquid from a heat exchanger to reduce the temperature of the centripetal housing and thus cooling the compressing air. This improves power and if the approach includes the use of fuel as the coolant a small increase in specific fuel consumption is also possible.

A 3D model of the IsoCool™ Centrifugal compressor cooling system by Frontline Aerospace
A 3D model of the IsoCool™ Centrifugal compressor cooling system by Frontline Aerospace
Actual centrifugal cooled compressor part
Actual centrifugal cooled compressor part

“The marketplace for this technology is the large installed base of turboshaft engines that use centripetal compressors. Although this takes some unique design effort for each class of engine being retrofitted, the engine performance improvement is an attractive upgrade for many military drone platforms.” said Wood.

About Frontline Aerospace

Frontline Aerospace, Inc., is an advanced manufacturing company focused on breakthrough energy efficiency technologies that increase the performance, reduce emissions and fuel consumption of gas turbines. The company’s IsoCool compressor and MicroFire recuperator technologies are designed to save money and fuel, increase the payload and range of thousands of in-service helicopters, as well enhance performance in ground-based military, industrial and commercial applications including manufacturing, pipeline pumping and power generation.