Water Ice in Bunker with Forced Air Circulation:

Figure illustrate the sketch of an ice bunker which is fitted in front of an insulated vehicle. Air is sucked over ice through the blower taking its drive from the engine. A half HP blower shall add up a heat corresponding of 0.37 kW. A combination of ice and salt can also be utilized for lower temperatures up to - 9°C.

Ice Bunker in Transport Refrigeration

Using Dry Ice:

Dry ice is utilized in several small retail trucks for the supply of frozen food, like ice-cream. The usual location of the dry-ice blocks is in the ceiling. The cooling is by natural convection. While forced convection is working, dry ice might be placed in bunkers only like water ice. The refrigerating influence formed by the sublimation of dry ice, that takes place at a temperature of - 78.5°C, is 605.5 kJ/kg. In the use of dry ice, care ought to be taken to ignore bums because of low temperature, and suffocation because of lack of oxygen.