Heat exchange – Regenerator – Checker brick structure
Patent
1982-09-30
1985-05-28
Davis, Jr., Albert W.
Heat exchange
Regenerator
Checker brick structure
62102, 62467, 62476, 16510412, F25B 1500, F25D 2100
Patent
active
045194416
ABSTRACT:
Thermal energy contained in a flow of hot fluid is employed to produce a heat source liquid at a temperature higher than that of said hot fluid by transferring heat from said hot fluid to a liquid at a relatively low superatmospheric pressure, which liquid contains two chemical substances in combination pursuant to a reversible exothermic chemical reaction, causing said two substances to separate with one remaining in liquid state and the other, which is non-aqueous, volatilizing into gaseous state. The gaseous substance is then separately condensed at said low superatmospheric pressure and the condensate and the said remaining liquid substance are each pumped to a high pressure and then mixed together with the result that the two chemical substances recombine pursuant to said exothermic reaction causing the liquid mixture to heat to a relatively high temperature and thereby produce the said heat source liquid from which heat is transferred to a heat utilizing fluid, e.g. water which is vaporized to produce steam. An illustrative embodiment employs ammonia and water as the two chemical substances which combine to form ammonium hydroxide by a reversible exothermic reaction. Another embodiment operating at a materially higher temperature employs ammonia and molton zinc chloride monammoniacate which combine to form zinc chloride diammoniacate by a reversible exothermic reaction.
REFERENCES:
patent: 3967676 (1976-07-01), Spacil
patent: 4167101 (1979-09-01), Rojey
patent: 4410028 (1983-10-01), Alefeld et al.
Wakao et al., Nitric Acid Cycle Process, Nature, vol. 273, 5/4/78, pp. 25-27.
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