Environmental Engineering Reference
In-Depth Information
decent level of energy integration in any industrial facility, most of the time, needs capital
investment.
This chapter addresses the problem of waste heat recovery via presenting an introduction
to the pinch technology and two industrial applications of heat integration for waste heat
recovery in oil and gas business. Pinch technology, after almost three decades of its
emanation in the late seventies for a reason or another, is still the most widely used method
for energy integration in oil industry.
The chapter comes into two parts; the first part introduces some aspects of Pinch
technology in brief. Pinch technology is now well documented in several literatures and the
references 1 to 4 at the end of this chapter are only few main examples. In this part, I will
show how we can use pinch technology for energy utility targeting, selection of utility mix
and heat exchanger network synthesis using pinch design method [1, 2, 3 and 4]. The second
part introduces two important applications for heat integration in oil industry [5]. The first
application is showing the effect of heat integration on both energy consumption and GHG
emission reduction in an oil-gas separation facility, and in the second application an
evolutionary approach to crude distillation pre-heat train design is introduced.
T
ARGETING
U
SING
G
RAPHICAL
M
ETHOD
Any heat exchanger can be represented as a hot stream that is cooled by a cold stream
and/or cold utility and a cold stream that is heated by a hot stream and/or hot utility with a
specified minimum temperature approach between the hot and the cold called ∆Tmin.
The process exhibited below in the graph shows the situation when the two streams do
not have a chance of overlap that produce heat integration between the hot and the cold.
Figure 1. Two Non-Overlapping Streams
