Chill-Freeze_-_Air_Blast |
Cooler_Impingement_CHBabbAir Blast Chiller/Freezer – Chilled Air

Industry: Fruit and Vegetables (NAICS 3114) Meat (NAICS 3116)

NAICS process:


311411 Frozen Fruit and Vegetables

311412 Frozen Specialties

311611 Animal Slaughtering

311612 Meat Processed from Carcasses

311615 Poultry


Process Brief: Chilled air is blasted over the product to achieve rapid cooling


Energy source: Electricity/ some Natural Gas


Energy Intensity: 250-1,700 Btu/lb of product


Air blast chillers and freezers are the most used technology in the food industry. Air is cooled using mechanical (electricity) or thermal (natural gas) methods. An air blast unit blows chilled air at a speed of 5-20 feet per second, which achieves much higher heat transfer rates than still air units. Air blast equipment is very adaptable to a range of products and is critical for cooling recently slaughtered or cooked products before bacterial growth can spread.


Air blast technology is used in a variety of applications but chillers/freezers are common for the storage of fruits, vegetables, and meats. The heat transfer rate on the surface of the product is 2 to 5 times higher than still air technology because the high air velocity reduces the boundary layer of air around a product.


Energy Efficiency

From the CH Babb Company web site:


BABBCO High Velocity Air Impingement coolers are designed to assist in cooling baked products. They have replaced many existing nitrogen and refrigeration cooling systems providing our customers with significant cost savings. Each cooler is custom built to customer specifications so that the cooling needs of various products are accommodated. The units cool the product by distributing cooled air through a series of pressurized stainless steel distribution ducts positioned above and below the conveyor belt. The cooled air impinges upon the product and the belt through a hole pattern in the distribution duct that has a 75% open area for superior cooling capabilities. This cooled air is most often drawn from filtered ambient air through the use of a series of fans. If desired, a variety of options for cooling the air for more efficient cooling of the product is available including evaporation units, refrigeration, or chilled water. Depending on your products’ needs this cooling system can provide many advantages including a reduced workload for your existing spiral freezer.


More information at Cooling – Air Impingement





C.H. Babb Company, Inc.

445 Paramount Drive

Raynham, MA 02767

Telephone: 508-977-0600


Web site:










Source: Overview GRI-03/0075; photo from CH Babb web site 3/2007;

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