Power plants – Pressure fluid source and motor
Patent
1975-09-15
1976-10-19
Ostrager, Allen M.
Power plants
Pressure fluid source and motor
60527, 60528, 60413, 417321, 417379, F16D 3102
Patent
active
039863549
ABSTRACT:
A method and apparatus are described for recovering useful amounts of low-temperature industrial and solar waste heat energy previously dissipated to ambient. The low-temperature heat energy is used cyclically for heating and expanding thermally expandable wall means shown as a cylindrical walled structure located between two pumping chambers for simultaneously changing the volumes of the chambers in opposite senses, then a cold sink is used cyclically for cooling and contracting said cylindrical walled structure for again simultaneously changing the volumes of both chambers in the opposite senses, i.e. in push-pull relationships. The cyclic change in volumes of the chambers displaces an incompressible fluid which is used for pumping a liquid from a reservoir for performing useful work, and, in one form of the invention, the liquid is directed into an accumulator under pressure, and the pressurized liquid in the accumulator may thereafter be utilized to perform useful work. A heat transfer fluid medium is used in one portion of the cycle to transfer heat energy from the energy source to heat and expand the cylindrical walled structure, and in another portion of the cycle to absorb heat energy from this walled structure to cool and contract it. This heat transfer fluid medium is shown as being compartmentalized into a number of small insulated volumes thereof which progressively serve to heat and cool the expandable wall means of the pumping chambers while minimizing loss of heat energy. For minimizing thermal losses, hydraulic transformers may be included isolating the incompressible fluid (being pulsated by the pumping chambers) from the pressurized liquid. This incompressible pulsating fluid may be a de-gassed liquid or a soft elastomer.
REFERENCES:
patent: 2884866 (1959-05-01), Patterson
patent: 3099222 (1963-07-01), Poliseo
patent: 3259070 (1966-05-01), McKenzie
patent: 3291054 (1966-12-01), McKenzie
patent: 3937019 (1976-02-01), Renner
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