Up to this chapter, attention has been given to mass integration. As mentioned in Chapter
One, there are two main commodities handled in the process: mass and energy. Both contribute
to the overall performance of the process and both affect the capital and operating costs of the
process. Heat is one of the most important energy forms in the process. The current chapter
provides an overview of heat integration. First, the problem of synthesizing networks of heat
exchangers is discussed while highlighting the analogy with synthesizing networks of mass
exchangers. Next, targeting procedures are presented with the objective of minimizing heating
and cooling utilities while maximizing heat exchange among the process streams.