Direct contact heat exchanger with phase change of working fluid

Details Direct contact heat exchanger with phase change of working fluid Direct contact heat exchanger with phase change of working fluid

1978-08-03

1980-03-11

Davis, Jr., Albert W.

Power plants

Utilizing natural heat

Geothermal

60659, 165104S, 128 28, 126400, F03G 702

Patent

active

041921445

ABSTRACT:
A direct contact thermal storage heat exchanger which utilizes the liquid-vapor phase change of a working fluid within the heat exchanger, and energy generation systems incorporating the heat exchanger. The heat exchanger is particularly useful in combination with a solar energy receiver. The heat exchanger includes an insulated pressure vessel packed with pebbles or spheres. Working fluid in the vapor phase from a solar heat source enters the unit and condenses, transferring thermal energy to the pebbles. The liquid level of working fluid about the pebbles is decreased during this mode of operation. When it is desirable to release this stored energy the liquid level is increased, and the energy is transferred to the working fluid which forms a vapor, and can be used to drive a turbine or other prime movers.

REFERENCES:
patent: 2933885 (1960-04-01), Benedek et al.
patent: 3977197 (1976-08-01), Brantley, Jr.

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