ABSTRACT
Cooling tunnels are utilized in many industries to cool
product from unit operations, such as ovens, fryers, and
dryers, and enrobes to packaging temperatures. The com-
mon objective of cooling tunnels is to cool the product
without inducing detrimental changes to product quality.
The cooling rate may need to be controlled to ensure proper
hardening of coatings such as chocolate without inducing
bloom. Too cold of cooling air on baked goods may cause
rapid staling of the product. In baked goods, the humidity of
the cooling air will affect the surface properties and final
moisture content of the product.[1] Cooling tunnels can use
ambient temperature air or refrigerated air depending on the
cooling requirements and the ambient conditions available.
COOLING TUNNEL DESIGN
