Control of heat exchangers

Figure 3.8. Temperature control of heat exchangers without phase change.

FIGURE 13.2. The conventional control of heat exchanger temperatures... 

Except for adiabatic reactor operation, precise control of heat exchange is difficult. The local rate of heat exchange between the reactor and the surrounding and the local temperature are interrelated and depend on the fluid-dynamic conditions inside the reactor. 

Mathisen, K.W., S. Skogestad, and E.A. Wolff, Bypass Selection for Control of Heat Exchanger Networks, Comput. Chem. Eng., 16(S), S263-S272 (1993). 

Suspension systems offer the advantages of processes performed in a heterogeneous medium, such as improved control of heat exchange mechanisms a rednction in the amount of contaminants in the final product ease of material separation in the product and its principal feature, a particle size ranging between 50 and 500 pm, which can be easily controlled by the combination of stirring speed and snspending agent concentration [6,8,9]. 

Sanders, C, W., "Better Control of Heat Exchangers", Chemical Engineering. Sept. 21,... 

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