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The evaporator section is the part of the system, which does the actual cooling of a product. It is a cold surface of proper size to cool a product to the desired temperature. There are two general types we build for liquid chilling.
1. A coil or plate type, which sits in a product that is agitated. Example 1 Example 2 Example 3 Example 4
2. A shell-and-tube heat exchanger through which a product is pumped. The shell and tube heat exchanger is further subdivided into two classes: DX (direct expansion) heat exchangers, Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 and flooded heat exchanger units Example 1 Example 2 Example 3 Example 4.
For gas chilling and drying applications, either a finned coil (similar to an air cooled condenser), or a shell-and-tube heat exchanger can be used. The type of gas to be cooled and its pressure may restrict the choice.