Power plants – Motive fluid energized by externally applied heat – Power system involving change of state
Patent
1985-12-04
1988-04-19
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Power system involving change of state
60669, 290 1A, F01K 1100, F01K 1300
Patent
active
047381116
ABSTRACT:
A modular, frame-mounted power unit for converting heat from a low-grade energy source to electric power. Heat from a source is supplied to the power unit in the form of hot fluid circulated through a heat exchanger associated with a boiler. Liquid refrigerant in the boiler is vaporized and passes through the stages of an organic Rankine cycle, the expansion stage being carried out in a rotary, positive displacement expander. The condensing stage is carried out in a condenser associated with a cold heat exchanger which is connected to a supply of cooling fluid through cooling lines. The output shaft of the expander is connected to drive an electric power generator and individual fluid feed pumps for returning liquid refrigerant from the condenser to the boiler and for circulating hot and cold fluids through the hot and cold heat exchangers, respectively. A cylindrical refrigerant boiler and cylindrical condenser pass through and are mounted to two vertical plates, on which are mounted the expander, power generator, fluid circulating pumps, and feed pumps.
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