Page 304 - Design and Operation of Heat Exchangers and their Networks

290 Design and operation of heat exchangers and their networks

Example H4C3—cont’d

Total annual cost ($/yr)
Solutions in the literature Reported Revised
Huang and Karimi (2012, 2013) 105,403 105,426
Ciric and Floudas (1991, Fig. 7) 114,460 a 106,877
Vidyashankar and Narasimhan (2008) 108,838 108,047
Xiao et al. (1993) 109,195 108,575
Lv et al. (2017) 109,181
a
After revision, H1C3, H2C3, and H4C2 are deleted.
351.6
160 110
H1
(7.032)
199.9 736.9
249 138
H2
(8.44)
149.9
694.6 384 585.2
227 106
H3
(11.816)
875
271 146
H4
(7)
160 96
(9.144) C1
217 116
C2
(7.296)
210.4
250 140
C3
(18)
(8.191837)
Fig. 6.24 Optimal solution for Example H4C3, TAC¼105,426$/yr (Huang and
Karimi, 2012).

Example H6C1
This example was taken from Papoulias and Grossmann (1983a).The
overall heat transfer coefficients can be found in the literature (Ciric and
Floudas, 1991). For the unique revision and comparison of the local
minimal TACT, we keep the problem data in its original English units
2
and supplement the heat transfer coefficient of H5 to be 0.06kBtu/ft °F,
as is shown in Table 6.25. The best network was obtained by Ciric and
Floudas (1991) shown in Fig. 6.25, with five independent variables and
the revised TAC¼639,188$/yr.