Freeze resistant, Perkins tube type heat exchanger

Details Freeze resistant, Perkins tube type heat exchanger Freeze resistant, Perkins tube type heat exchanger

1998-05-22

1999-08-31

Green, Anthony

Compositions

Frost-preventing, ice-thawing, thermostatic, thermophoric,...

252 67, 252 68, 106 13, C09K 500

Patent

active

059450312

ABSTRACT:
A freeze resistant aqueous coolant solution for use in Perkins tube type heat exchangers is formed of one or more metal salts selected from the alkali metals of Group IA and the alkaline earth metals of Group IIA of the Periodic Table. Depending upon the composition of the metal tubes of the heat exchanger, the concentration of the metal salt ranges from about 5% to about 10% by weight of the solution and the pH of the solution ranges between 7.3 and 11.5.

REFERENCES:
patent: 4857222 (1989-08-01), Itoh et al.
patent: 4877080 (1989-10-01), Ryham
patent: 5016448 (1991-05-01), Plzak
patent: 5108638 (1992-04-01), Iizuka et al.
patent: 5123479 (1992-06-01), Pravda
patent: 5255534 (1993-10-01), Ryan
Japio Patent Abstract No. JP357074549A, abstract of Japanese Patent Specification No. 57-074549, May 1982.
Japio Patent Abstract No. JP361281856A, abstract of Japanese Patent Specification No. 61-281856, Dec. 1986.

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