Nitinol engine for low grade heat

Details Nitinol engine for low grade heat Nitinol engine for low grade heat

1978-08-14

1981-12-01

Ostrager, Allen M.

Power plants

Motor operated by expansion and/or contraction of a unit of...

Mass is a solid

F03G 706

Patent

active

043029388

ABSTRACT:
A continuous band of Nitinol wrapping in between a cluster of tightly engaged rollers to form a series of S-shaped bends is used as the principle working medium of a thermal engine to convert low grade heat to mechanical power output. The band, together with the rollers, divides the space into an inner and an outer zone. A stream of warmer water and a stream of cooler water are guided to flow separately through one or the other of the two zones to make uniform and intimate contact with the segments of the Nitinol band alternatively at appropriate intervals. A well defined four-cycle operation of temperature and stress is thus established and can convert a portion of the energy which is available in the thermal gradient of the two water streams into a mechanical shaft power which may be tapped from one of the rollers.

REFERENCES:
patent: 3303642 (1967-02-01), Lee
patent: 4010612 (1977-03-01), Sandoval
patent: 4117680 (1978-10-01), Smith

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