Helical cooling coils

Helical coils, heat transfer in 496 -- cooling coils 496... 

FIGURE 10.1 Types of stirred tank reactor, (a) Multiphase stirred reactor. I impeller, 2 baffles, 3 cooling coils, 4 gas sparger, (b) Stirred reactor with gas-inducing impeller (dead-end type), (c) Stirred reactor with helical ribbon impeller (used with or without a draft tube). 

As an alternative to jacket cooling or to supplement the jacket, a helical cooling coil can be installed between the impeller and the wall, as shown in Figure 5.1b. The film coefficient for the outside of the coil is given by [1]... 

Vessel with heating coils. In Fig. 4.13-lb an agitated vessel with a helical heating or cooling coil is shown. Correlations for the heat-transfer coefficient to the outside surface of the coils in agitated vessels are listed below for various types of agitators. 

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