Page 294 - Design and Operation of Heat Exchangers and their Networks

280 Design and operation of heat exchangers and their networks

Example H2C2_443K
This example is taken from Linnhoff et al. (1982) by Yee and Grossmann
(1990),as is listed in Table 6.16. The best network without stream split
was found by Wang et al. (2017), of which TAC¼79,233$/yr. If the
stream split is allowed, we can find even better results shown in Fig. 6.16
with TAC¼77,964$/yr, using our hybrid genetic algorithm (Luo
et al., 2009).

Table 6.16 Problem data for H2C2_443K (Yee and Grossmann, 1990).
2
_
Stream T in (K) T out (K) C (kW/K) α (kW/m K) Cost ($/kWyr)
H1 443 333 30 1.6
H2 423 303 15 1.6
C1 293 408 20 1.6
C2 353 413 40 1.6
HU 450 450 4.8 80
CU 293 313 1.6 20
2
Heat exchanger cost (except heaters)¼1000A 0.6 $/yr (A in m )
2
Heat exchanger cost for heaters¼1200A 0.6 $/yr (A in m )
Total annual cost ($/yr)
Solutions in the literature Reported Revised
Own work – 77,964
Wang et al. (2017) a 79,233 79,233
Yee and Grossmann (1990) 80,274 80,272
Zhu et al. (1995) 80,815 80,291
Yee and Grossmann (1990) a 89,832 85,353
Azeez et al. (2013) 90,521 87,594
a
No stream split.

400
201.7 2400 298.3 353
443 293
H1
(30)
1800
423 353
H2
(15)
408 333
(20) C1
413 (15.10036) 303 C2
(40)
Fig. 6.16 Optimal solution for Example H2C2_443K, TAC¼77,964$/yr.