Compact, Recuperated, Binary-Fluid Rankine-Cycle Engine

A Rankine-cycle engine that contains a binary working fluid (ammonia + water) and a recuperative heat exchanger has been built and tested. This engine is a prototype of "bottoming"-cycle engines that would be used to extract additional useful power from the exhaust heat of gas turbine engines. Its advantages are well suited to vehicles, where volume and weight are important constraints.