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A Report On The Free Piston Stirling

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There are two types of Stirling engines to be considered--the "kinematic" engine and the "free-piston" engine. Most of the military missions would use Lhe kinematic Stirling that produces mechanical work directly; and this is the one that has received nearly all the development work to date. The free-piston Stirling is a sealed engine which uses a magnetized power piston to activate alternator coils outside the pressure walls of the engine, thus producing an electrical output. This configuration avoids the working fluid leakage problems associated with the moving seals in a kinematic engine, but may be somewhat less efficient. GENERATOR SETS (MOBILE Electrical power) General Purpose Sets There are a wide variety of military needs for portable gcneration of electric power to support weapons systems, communications, housekeeping power, environmental control, and many other functions. In order to avoid proliferation of makes, models, and sizes, a DoD Standard Family of Mobile Electric Power Sets has been established from which all users of electric power in the field must choose to support their system requirements. This family is shown in Table ES-2. It will be noted that while the power range is 0.5 to 750 kilowatts (kw), the majority of sets are in the 1.5 to 60 kw range, with the smaller end of the range (under 15 kw) being most numerous. With the exception of the very small power range, all the engines used are commercially available diesel engines, and there is a desire

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