An automotive propulsion concept is presented which
utilizes liquid nitrogen as the working fluid for an open
Rankine cycle. Ambient heat exchangers are used to power
an engine that is configured to maximize heat transfer during
the expansion stroke. If sufficient heat input during the
expansion process can be realized then this cryogenic
propulsive system would provide greater automotive ranges
and lower operating costs than those of electric vehicles
currently being considered for mass production. The
feasibility of meeting this engineering challenge has been
evaluated and several means of achieving quasi-isothermal
expansion are discussed.
QUASI-ISOTHERMAL EXPANSION ENGINE FOR CRYOGENIC AUTOMOTIVE PROPULSION
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