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

C - Chemistry, Metallurgy

09

K

C09K 5/00 (2006.01) C09K 5/06 (2006.01) C23F 11/10 (2006.01) F25B 27/00 (2006.01)

Patent

CA 2162769

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 solution of sodium nitrite and sodium nitrate lowers the freezing point of the cooling water to -13.2°C (8.3°F) yet still permits the chilled water to stratify in the storage tank.

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