Abstract: Among other things, a chiller for chilling water to be dispensed as part of beverages includes a tank configured to contain a cooling mass for chilling the water. A first tube in the tank is configured to be immersed in the cooling mass and to carry the water along a path from a source towards a location where the chilled water is to be dispensed as part of the beverages. A second tube is configured to be immersed in the cooling mass and to carry a coolant along a recirculation path from a coolant source and back to the coolant source. The coolant has a sufficiently low temperature to cause a frozen mass to be formed as part of the cooling mass within the tank and in the vicinity of the second tube. The first tube and the second tube are configured and positioned relative to one another within the tank so that the frozen mass occupies at least 30 percent of the volume of the cooling mass in the tank but does not touch the first tube.

Abstract: Among other things, a chiller for chilling water to be dispensed as part of beverages includes a tank configured to contain a cooling mass for chilling the water. A first tube in the tank is configured to be immersed in the cooling mass and to carry the water along a path from a source towards a location where the chilled water is to be dispensed as part of the beverages. A second tube is configured to be immersed in the cooling mass and to carry a coolant along a recirculation path from a coolant source and back to the coolant source. The coolant has a sufficiently low temperature to cause a frozen mass to be formed as part of the cooling mass within the tank and in the vicinity of the second tube. The first tube and the second tube are configured and positioned relative to one another within the tank so that the frozen mass occupies at least 30 percent of the volume of the cooling mass in the tank but does not touch the first tube.