Page 309 - Design and Operation of Heat Exchangers and their Networks

Optimal design of heat exchanger networks 295

Example H4C5—cont’d
6013
327 14683.51 1899 (24.41441) 40
H1
(100)
4878
220 (83.46773) 160
H2
(160)
3517
714.4022
220 (7.610622) 60
H3
(60)
1231
260 (72.99186) 45
H4 (400)
11715 22343
300 100 C1
(100)
164 (90.54818) 35 C2
4721.730 2849.029 (70)
6104 2925.576
138 85 C3
(350)
170 (320.7601) 60 C4
16651.40 (60)
1694 10744.14 5369.084
300 140 C5
(200)
(96.90193)
Fig. 6.27 Optimal solution for Example H4C5, TAC¼2,892,924$/yr (Pettersson, 2005).
Example H5C5
This example is the well-known 10SP1 synthesis problem proposed by Pho
and Lapidus (1973). Since then, a lot of researchers published their best
solutions of this problem, which gradually approached to its global
optimal design. The original problem data were given in English units
(Pho and Lapidus, 1973, Table 2; Yee et al., 1990, Table 3). Since
Papoulias and Grossmann (1983a), most researchers have used the
problem data transferred from English units to international system of
units (SI). For the unique comparison of the published network

Table 6.28 Problem data for H5C5 (Lewin, 1998).
2
_
Stream T in (K) T out (K) C (kW/K) α (kW/m K) Cost ($/kWyr)
H1 433 366 8.79 1.704
H2 522 411 10.55 1.704
H3 544 422 12.56 1.704
H4 500 339 14.77 1.704
H5 472 339 17.73 1.704
C1 355 450 17.28 1.704
C2 366 478 13.9 1.704
C3 311 494 8.44 1.704
C4 333 433 7.62 1.704
C5 389 495 6.08 1.704
HU 509 509 3.408 37.64
CU 311 355 1.704 18.12
0.6
2
Heat exchanger cost¼145.63A $/yr (A in m )
Continued