Auxilliary Power Unit

The objective of the Phase I study is to define an Auxiliary Power Unit (APU) with an output of 10-15 Kw (7.5 Kw DC and 3-8 Kw AC) which will satisfy the mission requirements. Emphasis will be placed on defining an APU which is suitable for the unique operating requirements of the AAV type vehicles. These include a confined enclosed space, high compartment temperatures and a marine atmosphere. The APU will utilize the RPI SCORE (TM) Series 40 Engine as the generator drive. The candidate engine model is small, lightweight and, depending on the model chosen, produces from one to two horsepower per cubic inch displacement and has the potential for even higher power density (the 70 series rotary demonstrated five horsepower per cubic inch displacement). The engine is a true multifuel engine with the capability of operating on heavy fuels and gasoline. The study will detemine the engine generator combination that provides the ac and dc power needs while optimizing other system requirements such as smoke emission, fuel economy, noise and infrared signature. Included in the study will be an investigation directed toward utilizing the AAV vehicles existing intake, exhaust and cooling system to support the APU.