The problem of preserving food and increasing their biological stability is one of the important problems of modern food production. The pasteurization process, due to the transition to a temperature of up to 60-70 degrees, remains unchanged preservation of liquid products. The considered system of the tunnel pasteurization process, which is used in the production of beer and other fermentation beverages, makes it possible to increase the energy efficiency of the pasteurization process due to the reuse of heated water and temperature exchange between the chambers of the system and product cooling. Reducing energy consumption for heating by using such an automated system can be up to five times. In addition, the use of this system leads to significant savings in water consumption.