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22 Cha p te r T w o
high utility usage by the distillery. The steam in question resulted
from the use of a heat pump, and so the steam below the Process
Pinch was eliminated by reducing the heat pump’s size. Although
this approach required that the steam now be used for process
heating above the Process Pinch, overall energy costs were still
reduced owing to the reduced compressor duty.
2.11 Summary
This chapter offered an introduction to and an overview of the field
of PI, its HI roots, the expansion of its application areas, and the
evolution of process optimization methods toward combining
PI techniques and insights with the tools of MPR. The chapter
discussed the philosophy of PI as well as its contribution to
sustainable development and the economic efficiency of projects.
There is a wealth of useful information on these topics, and a
number of excellent sources of further information are described in
Chapters 13 and 14.
