ABSTRACT
In an attempt to improve the rate of heat transfer and the uniformity of heating, many novel types of heat exchangers have been manufactured. One such category is helical heat exchangers (Figure 25.1). A variety of helical heat exchangers are in use in the food industry; however, the underlying principle and hence the design criteria are not well understood. This has resulted in much use of trial and error in ascertaining the appropriate combination of system and process parameters for the design of a process.
