Method of low-temperature stratified chilled water storage

Details Method of low-temperature stratified chilled water storage Method of low-temperature stratified chilled water storage

1994-06-16

1995-11-14

Tapolcai, William E.

Refrigeration

Processes

Accumulating holdover ice in situ

165 10, 252 70, F25D 300

Patent

active

054655854

ABSTRACT:
The lower-most temperature of the thermal mass in a chilled water stratified storage tank is lowered without reducing its density by the addition of sodium nitrite and sodium nitrate, alone or in combination, preserving thermal stratification so that both warm and chilled water may be stored in the tank, a benefit not previously obtained without the use of chemicals damaging to the environment. A 7% solution of sodium nitrite and sodium nitrate in a 2 to 1 ratio lowers the freezing point of the cooling water to -3.75.degree. C. (25.25.degree. F.) yet still permits the chilled water to stratify in the storage tank.

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patent: 4821794 (1989-04-01), Tsai et al.
patent: 5065598 (1991-11-01), Kurisu et al.
patent: 5348080 (1994-09-01), Kuroda et al.

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