Power plants – Utilizing natural heat – Solar
Patent
1980-04-28
1982-11-16
Davis, Jr., Albert W.
Power plants
Utilizing natural heat
Solar
60660, 60667, 126433, F03G 702
Patent
active
043589294
ABSTRACT:
Various control methods and means are disclosed for varying the temperature of vaporization of a solar-powered system so that the instantaneous power delivered by the heat engine of this system, or by a device driven by this engine, is a maximum for given conditions external to the power system, or to the power system and the driven device, respectively, while ensuring that dry saturated vapor, or vapor with a preselected amount of superheat is supplied to the heat engine.
The power system uses a Rankine power cycle whose working fluid is either vaporized in the absorber of a solar collector, or in a heat exchanger by a separate fluid which absorbs heat by flowing through the solar collector absorber.
Also, various methods and means are disclosed for controlling the foregoing separate heat-transfer fluid so that it absorbs sensible and latent heat in the absorber of the solar collector in essentially the same ratio as the power-cycle working fluid absorbs sensible and latent heat from this heat-transfer fluid.
REFERENCES:
Yamada, T. Control of a Vapor Engine Memoirs of the Defense Academy Japan, vol. XIV, No. 2, pp. 23-39, 6/74.
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