Abstract: A cooling apparatus includes a shell adapted to hermetically store liquid water, a heat exchanging structure adapted to receive a substance to cool down, and a vacuum pump. The heat exchanging structure has one or more heat transfer walls, each of the heat transfer walls having a first surface in contact with the liquid water stored in the shell, and a second surface in contact with the substance to cool down. The vacuum pump is operable to create a partial vacuum on a surface of the liquid water, whereby causing a decrease in a temperature of the liquid water in the shell. In other embodiments, methods of cooling a substance are also described.

Abstract: A cooling apparatus includes a shell adapted to hermetically store liquid water, a heat exchanging structure adapted to receive a substance to cool down, and a vacuum pump. The heat exchanging structure has one or more heat transfer walls, each of the heat transfer walls having a first surface in contact with the liquid water stored in the shell, and a second surface in contact with the substance to cool down. The vacuum pump is operable to create a partial vacuum on a surface of the liquid water, whereby causing a decrease in a temperature of the liquid water in the shell. In other embodiments, methods of cooling a substance are also described.